Klaartje de Weerdt

About

Current research and teaching

Since 2014 I work as Professor at the Department of Structural Engineering, NTNU Trondheim. I am dividing my time between research and teaching.

In the autumn I teach Building Materials (TKT4240) to the 1st year Civil Engineering MSc students together with Prof. Tore Kvande. In spring I teach Concrete Structures I (TKT4175) to 3rd year Civil Engineering MSc students together with Prof. Jan Arve Øverli. In addition I contribute to the 4th year Concrete Technology I classes (TKT4215), Concrete Technology for Bridge (KT6004) as part of an experience based MSc program, as well as courses organized by the Norwegian Concrete Association.

Our research team is working on topics oriented towards cement hydration and concrete durability, with other words, concrete from cradle to grave.

Why do we need research on concrete? Cement is the glue of concrete. When it reacts with water it forms solid hydrates which glue the aggregates (stones) in the concrete together to form an artificial rock. The production of conventional Portland cement is associated with large amounts of CO2 emissions. One way of reducing these emissions is by replacing part of the Portland cement with supplementary materials such as limestone, fly ash (by product of coal fired power plants), blast furnace slag (byproduct of iron production), or calcined clay. The resulting composite cements behave differently than the conventional Portland cements both in fresh concrete (e.g. flow, interaction with chemical admixtures etc.) and as a hardened material (e.g. durability and mechanical properties). Research is needed to understand the behavior of these composite cements and to give provide a basis to potentially adapt the practice, regulations and test methods.

Through collaboration with other departments at NTNU and SINTEF we have access to large variety of experimental facilities. For analysis of samples we use amongst others TGA, XRD, SEM, calorimetry, rheology, titration, and ICP-MS. For exposure of concrete we have together with SINTEF access to amongst others carbonation chambers, ASR reactors, spray chambers, frost cabinets.

Publications

2025

Lothenbach, Barbara; Krüger, Miriam E.; Ranger, Maxime; Bergmann, Ana; Hemstad, Petter; Lindgård, Jan. (2025) Report of RILEM TC 301-ASR: relation between pore solution composition and ASR expansion. Materials and Structures
Academic article
Krüger, Miriam E.; Heisig, Anne; Lode, Stefanie; Weerdt, Klaartje de; Machner, Alisa. (2025) The Distribution, Structure, and Chemical Composition of Alkali-Silica Gels in Calcined Clay Concretes. Buildings
Academic article
Weerdt, Klaartje de; Ranger, Maxime; Krüger, Miriam E.; Bergmann, Ana; Hemstad, Petter; Leemann, Andreas. (2025) Report of RILEM TC 301-ASR: Modelling the impact of SCMs, alkali level and w/b ratio on alkali concentration in pore solution. Materials and Structures
Academic article
Hazarika, Amrita; Huang, Liming; Erlingsson, Sigurdur; Weerdt, Klaartje de; Löfgren, Ingemar; Iftikhar, Sahar. (2025) Characterization, activation and reactivity – A case study of Nordic volcanic materials for application as Supplementary Cementitious Materials. Case Studies in Construction Materials
Academic article

2024

Zuschlag, Pamela; Machner, Alisa Lydia; Hemstad, Petter; Kjellsen, Knut Ose; Zajac, Maciej; Haha, Mohsen Ben. (2024) Hydration of Composite Cements Containing Novel SCMs. Nordic Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Weerdt, Klaartje de. (2024) Distribution of sulphate and aluminium in hydrated cement pastes. Cement and Concrete Research
Academic article
Bary, Benoît; Machner, Alisa; Weerdt, Klaartje de. (2024) Simulation of chloride diffusion tests in cement paste and mortar made with CEM II and CEM VI cements. Cement and Concrete Research
Academic article
Bagheri, Mahsa; Lothenbach, Barbara; Lindgård, Jan; Haugen, Marit Kristin; Danner, Tobias; Pedersen, Bård. (2024) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Lindgård, Jan; Pedersen, Bård; Oberhardt, Nikolas; Wigum, Børge Johannes; Ullnæss, Inger Lise; Aasly, Kurt. (2024) Norwegian research project on pyrrhotite in concrete aggregates – aim and status.
Academic chapter/article/Conference paper
Rønning, Terje; Lindgård, Jan; Bagheri, Mahsa; Wigum, Børge Johannes; Danner, Tobias; Weerdt, Klaartje de. (2024) Alkalis Released from Aggregates – Significance for Concrete Performance Testing.
Academic chapter/article/Conference paper
Hov, Sølve; Zabłocka, Kamila; Lopez, Ana Priscilla Paniagua; Weerdt, Klaartje de. (2024) Elemental mapping by micro X-ray fluorescence to assess binder distribution of improved soils. Géotechnique Letters
Academic article
Weerdt, Klaartje de; Bagheri, Mahsa; Lindgård, Jan; Lindstad, Hallvard; Rodrigues, A.; Duchesne, J.. (2024) Changes in cement paste during accelerated mortar bar testing for pyrrhotite containing aggregate. Cement and Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Kjellsen, Knut Ose; Weerdt, Klaartje de. (2024) The effect of varying cement replacement level on alkali metal distribution in cement pastes. Cement & Concrete Composites
Academic article

2023

Bagheri, Mahsa; Lindgård, Jan; Lothenbach, B.; Haugen, Marit Kristin; Danner, Tobias; Wigum, Børge Johannes. (2023) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Gu, Yushan; Machner, Alisa; Weerdt, Klaartje de; Šajna, Aljoša; Hanžič, Lucija; Müller, Arnaud. (2023) Modeling the durability of novel cementitious materials prepared with CEM II/C-M exposed to drying and carbonation. Construction and Building Materials
Academic article
Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje. (2023) Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Wilson, William; Machner, Alisa; Georget, Fabien. (2023) Chloride profiles – What do they tell us and how should they be used?. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Bernard, Ellina; Kunther, Wolfgang; Pedersen, Malene Thostrup; Lothenbach, Barbara. (2023) Phase changes in cementitious materials exposed to saline solutions. Cement and Concrete Research
Academic article

2022

Danner, Tobias; Weerdt, Klaartje De; Pedersen, Bård Magne; Lindgård, Jan. (2022) Investigations on the feasibility of the CWE method to verify potential alkali release from aggregates in Norwegian field concrete.
Academic chapter/article/Conference paper
Danner, Tobias; Norden, Geir; Weerdt, Klaartje De; Justnes, Harald. (2022) Low-Grade Kaolinite Clays for Sustainable Binders – Effect of mineralogy and curing temperature on hydration products.
Chapter
Weerdt, Klaartje De; Hemstad, Petter; Justnes, Harald; Østnor, Tone Anita; Rønning, Terje F.; Lindgård, Jan. (2022) Fundamental study on ASR kinetics - effect of temperature on aggregate reactivity and pore-water composition.
Academic chapter/article/Conference paper
Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; Weerdt, Klaartje De. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates and petrographic analysis. Critical review of the test method AAR-8. Materiales de construcción
Academic article
Babaahmadi, Arezou; Machner, Alisa; Kunther, Wolfgang; Figueira, João; Hemstad, Petter; Weerdt, Klaartje De. (2022) Chloride binding in Portland composite cements containing metakaolin and silica fume. Cement and Concrete Research
Academic article
Menéndez, Esperanza; Silva, António Santos; Duchesne, Josée; Berra, Mario; Weerdt, Klaartje De; Fernandes, Isabel. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates. Critical review of the test method AAR-8.
Academic chapter/article/Conference paper
Mery, Cristobal Javier Manquehual; Jakobsen, Pål Drevland; Holter, Karl Gunnar; Weerdt, Klaartje De; Danner, Tobias Alexander; Bruland, Amund. (2022) Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel. Construction and Building Materials
Academic article
Bitouri, Youssef El; Azéma, Nathalie; Saoût, Gwenn Le; Lauten, Rolf Andreas; Weerdt, Klaartje de. (2022) Effect of Plasticizer on Hydration and Rheological Behavior of Cement Pastes. CivilEng
Academic article
Fjendbo, Simon; Weerdt, Klaartje De; Sørensen, Henrik E.; Geiker, Mette Rica. (2022) When and How Should Chloride Profiles be Calibrated for Paste Fraction?. Nordic Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Geiker, Mette Rica. (2022) Å forutsi kloridinntrenging i betong i sjøvann. Byggeindustrien
Popular scientific article
Machner, Alisa; Bjørndal, Marie Helene; Justnes, Harald; Hanžič, Lucija; Šajna, Aljoša; Gu, Yushan. (2022) Effect of leaching on the composition of hydration phases during chloride exposure of mortar. Cement and Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2022) Correlating the development of chloride profiles and microstructural changes in marine concrete up to ten years. Cement & Concrete Composites
Academic article
Manquehual, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; Weerdt, Klaartje De; Bruland, Amund. (2022) Investigation of leaching in steel fiber-reinforced shotcrete exposed to fresh and saline groundwater in a subsea road tunnel. Cement and Concrete Research
Academic article
Lindstad, Hallvard; Lindgård, Jan; Pedersen, Bård Magne; Wigum, Børge Johannes; Aasly, Kurt; Ullnæss, Inger Lise. (2022) Pyrrhotite in concrete aggregate. Introduction to mechanism, damage potential and ongoing research.
Academic chapter/article/Conference paper
Wigum, Børge Johannes; Lindgård, Jan; Weerdt, Klaartje De; Pedersen, Bård Magne; Rønning, Terje F.. (2022) Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research.
Academic chapter/article/Conference paper
Gu, Yushan; Bary, Benoît; Machner, Alisa; Weerdt, Klaartje De; Bolte, Gerd; Haha, Mohsen Ben. (2022) Multi-scale strategy to estimate the mechanical and diffusive properties of cementitious materials prepared with CEM II/C-M. Cement & Concrete Composites
Academic article

2021

Justnes, Harald; Weerdt, Klaartje De; Østnor, Tone Anita. (2021) Portland Clinker-Fly Ash Cements – Relation between Compressive Strength and Microstructure.
Academic chapter/article/Conference paper
Hanžič, Lucija; Robič, Sebastijan; Machner, Alisa; Bjørndal, Marie Helene; Weerdt, Klaartje De; Gu, Yushan. (2021) Experimental carbonation study for a durability assessment of novel cementitious materials. Materials
Academic article
Weerdt, Klaartje De. (2021) Chloride binding in concrete: recent investigations and recognised knowledge gaps: RILEM Robert L’Hermite Medal Paper 2021. Materials and Structures
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Geiker, Mette Rica. (2021) The square root method for chloride ingress prediction - Applicability and limitations. Materials and Structures
Academic article
Machner, Alisa Lydia; Bjørndal, Marie Helene; Šajna, Aljoša; Mikanovic, Nikola; Weerdt, Klaartje De. (2021) Impact of leaching on chloride ingress profiles in concrete. Materials and Structures
Academic article
Snellings, Ruben; Machner, Alisa Lydia; Bolte, Gerd; Kamyab, Hadi; Durdzinski, Pawel; Teck, Priscilla. (2021) Hydration kinetics of ternary slag-limestone cements: Impact of water to binder ratio and curing temperature. Cement and Concrete Research
Academic article

2020

Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric; Bayle, Sandrine; Souche, Jean-Claude; Weerdt, Klaartje De. (2020) In vitro and in situ tests to evaluate the bacterial colonization of cementitious materials in the marine environment. Cement & Concrete Composites
Academic article
Hemstad, Petter; Machner, Alisa; Weerdt, Klaartje De. (2020) The effect of artificial leaching with HCl on chloride binding in ordinary Portland cement paste. Cement and Concrete Research
Academic article
Grimstad, Gustav; Lopez, Ana Priscilla Paniagua; Weerdt, Klaartje De. (2020) På vegen mot karbonnegativ stabil grunn. Byggeindustrien
Popular scientific article
Minerbe, Marielle Guéguen; Feugeas, Françoise; Lors, Christine; Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric. (2020) The influence of carbonation on the biocolonization of cementitious materials in the marine environment. Matériaux & Techniques
Academic article

2019

Machner, Alisa; Bjørndal, Marie Helene; Weerdt, Klaartje De. (2019) Ny sement for bedre miljø. Byggeindustrien
Popular scientific article
Weerdt, Klaartje De; Geiker, Mette Rica; Plusquellec, Gilles; Lindgård, Jan; Duchsne, Josee; Fournier, Benoit. (2019) Strategies for Quantification of Alkali Metal Release from Aggregates in Concrete.
Academic chapter/article/Conference paper
Revert, Andres Belda; Hornbostel, Karla; Weerdt, Klaartje De; Geiker, Mette Rica. (2019) Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism. Cement and Concrete Research
Academic article
Justnes, Harald; Weerdt, Klaartje De; Østnor, Tone Anita. (2019) Relation between strength of cements based on different clinkers and their microstructure.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Lothenbach, Barbara; Geiker, Mette Rica. (2019) Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar. Cement and Concrete Research
Academic article
Danielsen, Svein Willy; Hagelia, Per; Wigum, Børge Johannes; Weerdt, Klaartje De; Aasly, Kurt; Lindgård, Jan. (2019) Magnetkis i betongtilslag. Effekt på betongs bestandighet. Statens vegvesen Statens vegvesen
Report
Weerdt, Klaartje De; Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara. (2019) Effect of carbonation on the pore solution of mortar. Cement and Concrete Research
Academic article

2018

Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf A; Weerdt, Klaartje De. (2018) The effect of calcium lignosulfonate on ettringite formation in cement paste. Cement and Concrete Research
Academic article
Peng, Ya; Pedersen, Bård; Ng, Serina; Weerdt, Klaartje De; Jacobsen, Stefan. (2018) Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste. Nordic Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Weerdt, Klaartje De. (2018) Determining the free alkali metal content in concrete – Case study of an ASR-affected dam. Cement and Concrete Research
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion, impact of sampling technique on predicted service life.
Academic chapter/article/Conference paper
Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara; Weerdt, Klaartje De. (2018) Changes in pore solution composition in mortar due to carbonation.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2018) Impact of Accelerated Carbonation on Microstructure and Phase Assemblage. Nordic Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Chloride-binding capacity of hydrotalcite in cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Stability of the hydrate phase assemblage in Portland composite cements containing dolomite and metakaolin after leaching, carbonation, and chloride exposure. Cement & Concrete Composites
Academic article
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles. (2018) Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and µXRF. MATEC Web of Conferences
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion: Investigation of the corrosion onset. Construction and Building Materials
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Armeringskorrosjon i miljøvennlig betong. Byggeindustrien
Popular scientific article
Machner, Alisa; Hemstad, Petter; Weerdt, Klaartje De. (2018) Towards the Understanding of the pH Dependency of the Chloride Binding of Portland Cement Pastes. Nordic Concrete Research
Academic article
Li, Xuerun; Snellings, Ruben; Antoni, Mathieu; Alderete, Natalia Mariel; Haha, Mohsen Ben; Bishnoi, Shashank. (2018) Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1. Materials and Structures
Academic article

2017

Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut O.; Geiker, Mette Rica; Weerdt, Klaartje De. (2017) Portland metakaolin cement containing dolomite or limestone – Similarities and differences in phase assemblage and compressive strength. Construction and Building Materials
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2017) Investigation of the products of the dolomite reaction in Portland cement pastes.
Academic chapter/article/Conference paper
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; Weerdt, Klaartje De. (2017) On the effect of calcium lignosulfonate on the rheology and setting time of cement paste. Cement and Concrete Research
Academic article
Revert, Andres Belda; Geiker, Mette Rica; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth. (2017) SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V.
Academic chapter/article/Conference paper
Machner, Alisa; Weerdt, Klaartje De; Geiker, Mette Rica; Kjellsen, Knut O.. (2017) Bedre egenskaper med dolomitt i sement. Byggeindustrien
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Enemark-Rasmussen, Kasper. (2017) Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution. Cement & Concrete Composites
Academic article
Danner, Tobias; Weerdt, Klaartje De; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2017) State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Hisdal, Jorun-Marie; Weerdt, Klaartje De; Strømmen, Ingvald; Kvande, Tore. (2017) UROP ruler. Byggeindustrien
Article in business/trade/industry journal
Luong, Judy Yuen Wah; Aarstad, Kari; Weerdt, Klaartje De; Bjøntegaard, Øyvind. (2017) Excavated rock materials from tunnels for sprayed concrete.
Academic chapter/article/Conference paper
Plusquellec, Gilles; Weerdt, Klaartje De. (2017) Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Weerdt, Klaartje De; Plusquellec, Gilles; Lindgård, Jan; Wigum, Børge Johannes; Kermit, Peter Holiman. (2017) Determining alkali content in ASR performance-tested concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Weerdt, Klaartje De; Plusquellec, Gilles; Danner, Tobias; Geiker, Mette Rica. (2017) Ser betong i nytt lys med mikro-XRF. Byggeindustrien
Popular scientific article
Revert, Andres Belda; Hornbostel, Karla; Weerdt, Klaartje De; Geiker, Mette Rica. (2017) Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Hepsøe, Per Martin; Lindgård, Jan. (2017) Relative humidity measurements in concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Geiker, Mette Rica; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater.
Academic chapter/article/Conference paper
Geiker, Mette Rica; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress. Nordic Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; Weerdt, Klaartje De. (2017) Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison. Cement and Concrete Research
Academic article
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Østnor, Tone Anita; Lothenbach, Barbara; Winnefeld, Frank. (2017) Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; Weerdt, Klaartje De. (2017) On the mechanisms of consumption of calcium lignosulfonate by cement paste. Cement and Concrete Research
Academic article

2016

Vurucu, Havvagul; Weerdt, Klaartje De; Plusquellec, Gilles. (2016) Alkali-silica reaction in concrete dams: Alkali leaching in the Votna dam. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Weerdt, Klaartje De; Geiker, Mette Rica. (2016) Workshop on Moisture in Concrete, Trondheim, Norway 6–7 February 2012. Measurement of moisture and relative humidity in concrete. FA 3 Technical performance. FA 3.2 Service life. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Colombo, Alessia; Geiker, Mette Rica; Weerdt, Klaartje De. (2016) Plastifiserende stoffer til betong på nanonivå. Byggeindustrien
Popular scientific article
Weerdt, Klaartje de; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut concrete surfaces on chloride ingress resistance of concrete in marine splash zone. Sustainable Construction Materials and Technologies
Academic article
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Lothenbach, Barbara; Kaufmann, J.; Garzon, Sergio Ferreiro. (2016) Chloride resistance of Portland cement – calcined clay – limestone mortars.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Carbonation Characterization of Mortar with Portland Cement and Fly Ash, Comparison of Techniques. Nordic Concrete Research
Academic article
Weerdt, Klaartje De; Orsakova, Denisa; Muller, Arnaud CA; Larsen, Claus K; Pedersen, Bård; Geiker, Mette Rica. (2016) Towards the understanding of chloride profiles in marine exposed concrete, impact of leaching and moisture content. Construction and Building Materials
Academic article
Jakobsen, Ulla Hjorth; Weerdt, Klaartje De; Geiker, Mette Rica. (2016) Elemental zonation in marine concrete. Cement and Concrete Research
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Karbonatisering av miljøvennlig betong. Byggeindustrien
Popular scientific article
Plusquellec, Gilles; Geiker, Mette Rica; Duchesne, Josée; Lindgård, Jan; Weerdt, Klaartje De. (2016) Review of methods to determine the pH and the free alkali content of the pore solution in concrete. The International Conference on Alkali-Aggregate Reaction (ICAAR)
Academic article
Weerdt, Klaartje De; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut surface on chloride ingress resistance of concrete in marine splash zone.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Investigation of the effect of partial replacement of Portland Cement by Fly Ash on carbonation using TGA and SEM-EDS.
Academic chapter/article/Conference paper
Plusquellec, Gilles; Weerdt, Klaartje De. (2016) Alkalireaksjoner i betong - rollen til alkalier. Byggeindustrien
Popular scientific article
Shi, Z; Geiker, Mette Rica; Weerdt, Klaartje De; Østnor, Tone Anita; Lothenback, B.; Winnefeld, F.. (2016) Impact of cations on chloride binding in hydrated portland cement – metakaolin – limestone blends.
Academic chapter/article/Conference paper

2015

Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; Weerdt, Klaartje De. (2015) Critical investigation of TGA sample preparation for composite cements.
Academic chapter/article/Conference paper
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Lothenbach, Barbara; Kaufmann, Josef; Kunther, Wolfgang. (2015) Durability of portland cement blends including calcined clay and limestone: Interactions with sulfate, chloride and carbonate ions. RILEM Bookseries
Academic article
Jensen, MM; Weerdt, Klaartje De; Johannesson, B; Geiker, Mette Rica. (2015) Use of a multi-species reactive transport model to simulate chloride ingress in mortar exposed to NaCl solution or sea-water. Computational Materials Science
Academic article
Weerdt, Klaartje De; Geiker, Mette Rica; Orsakova, Denisa. (2015) Investigation of concrete from Solsvik field station - 4 concrete cores investigated after 16 years of submerged exposure. Norwegian Public Roads Administration Report Norwegian Public Roads Administration Report
Report
Hammer, Tor Arne; Kjellmark, Gunrid; Smeplass, Sverre; Weerdt, Klaartje De. (2015) Practical methods to assess segregation risk of SCC on site. FA: Competitive constructions. SP 2.1 Robust and highly flowable concrete with controlled surface quality. SINTEF Byggforsk SINTEF Byggforsk
Report
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald. (2015) Microstructure of clinker – fly ash interactions. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De; Geiker, Mette Rica. (2015) Hvor er kloridene i betong?. Anleggsmagasinet
Popular scientific article
Colombo, Alessia; Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2015) Effect of fly ash on the consumption of lignosulfonate by cement paste.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Geiker, Mette Rica. (2015) Carbonation front characterization: pH colour indicators.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Colombo, Alessia; Coppola, L.; Justnes, Harald; Geiker, Mette Rica. (2015) Impact of the associated cation on chloride binding of Portland cement paste. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Justnes, Harald; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2015) M-S-H formation in marine exposed concrete.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2015) The effect of sea water on the phase assemblage of hydrated cement paste. Cement & Concrete Composites
Academic article
Lothenbach, Barbara; Durdzinski, Pawel; Weerdt, Klaartje De. (2015) Thermogravimetric Analysis.
Academic chapter/article/Conference paper

2014

Geiker, Mette Rica; Weerdt, Klaartje De; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Hendriks, Max; Larsen, Claus K. (2014) Prediction of reinforcement corrosion in concrete structures.
Academic chapter/article/Conference paper
Peng, Ya; Weerdt, Klaartje De; Pedersen, Bård; Jacobsen, Stefan. (2014) Hydrostatic pressure to measure sedimentation and bleeding.
Academic chapter/article/Conference paper
Østnor, Tone Anita; Aarstad, Kari; Kaspersen, Kristin; Weerdt, Klaartje De. (2014) Brukermanual for BetongGUI – analyse og karakterisering av porer på betongoverflaten. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Weerdt, Klaartje De; Justnes, Harald. (2014) The Effect of Excessive Sea Water on the Phase Assemblage of Hydrated Cement Paste.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Ytterdal, Silje Gystad; Geiker, Mette Rica. (2014) On the impact of phase changes on chloride profiles in concrete.
Academic chapter/article/Conference paper
Peng, Ya; Jacobsen, Stefan; Weerdt, Klaartje De; Pedersen, Bård. (2014) Model and test methods for stability of fresh cement paste. Advances in Civil Engineering Materials
Academic article
Colombo, Alessia; Danner, Tobias; Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald; Geiker, Mette Rica. (2014) Changes in the phase assemblage of concrete exposed to sea water. Cement & Concrete Composites
Academic article
Peng, Ya; Weerdt, Klaartje De; Pedersen, Bård; Jacobsen, Stefan. (2014) Measuring sedimentation and bleeding of fresh paste with hydrostatic pressure. Nordic Concrete Research
Academic article
Weerdt, Klaartje De; Hammer, Tor Arne. (2014) Betong som ikke skiller seg.
Popular scientific chapter/article
Aarstad, Kari; Østnor, Tone Anita; Kaspersen, Kristin; Weerdt, Klaartje De. (2014) Snakker ikke nok om utseendet (betongoverflater).
Popular scientific chapter/article
Weerdt, Klaartje De; Orsáková, D.; Geiker, Mette Rica. (2014) The impact of sulphate and magnesium on chloride binding in Portland cement paste. Cement and Concrete Research
Academic article

2013

Justnes, Harald; Weerdt, Klaartje De; Geiker, Mette Rica. (2013) CHLORIDE BINDINGS IN CONCRETE EXPOSED TO SEA WATER AND SALT SOLUTIONS.
Academic chapter/article/Conference paper
Martius-Hammer, Tor Arne; Smeplass, Sverre; Weerdt, Klaartje De; Peng, Ya. (2013) Stability of SCC – robustness for changes in water content and sand grading. FA 2 Competitive constructions. SP 2.1 Robust highly flowable concrete. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald. (2013) Fly ash – Limestone Synergy in Ternary Cements. FA 1 Environmentally friendly concrete. SP 1.1 Low carbon-footprint binder systems. SINTEF Community SINTEF Community
Report
Wirthova, Michaela; Weerdt, Klaartje De; Jacobsen, Stefan. (2013) Static yield stress measurements on SCC, mortar and matrix. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald; Haha, Mohsen Ben; Kjellsen, Knut Ose. (2013) Fly-ash limestone synergy in triple cement.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2013) 10 year old concrete wall in tidal zone examined by SEM-EDS.
Academic chapter/article/Conference paper
Geiker, Mette Rica; Weerdt, Klaartje De; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Max, Hendriks. (2013) Levetid av armerte betongkonstruksjoner.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Colombo, Alessia; Geiker, Mette Rica. (2013) Impact of the associated cation on chloride binding in Portland cement paste.
Academic chapter/article/Conference paper

2012

Kaspersen, Kristin; Østnor, Tone Anita; Eide, Mari Bøhnsdalen; Weerdt, Klaartje De. (2012) Characterisation of concrete surfaces in Askimporten tunnel: COIN project report 45 - 2012. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) Modelling the reaction of fly ash and slag in blended cements.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) Changes in the phase assemblage of concrete exposed to seawater - case study.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) On the application of thermodynamic modelling for the prediction of the hydrate assemblage formed by blended cements.
Academic chapter/article/Conference paper
Peng, Ya; Jacobsen, Stefan; Weerdt, Klaartje De; Pedersen, Bård; Marstrander, Britt Blom. (2012) Overview of Rheological Parameters Affecting Stability of SCC.
Academic chapter/article/Conference paper
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2012) Rheology of matrix and SCC with different mineral fillers and admixtures : FA 2 Competitive constructions : SP 2.1 High quality manufactured sand for concrete. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De; Haha, M. Ben; Saout, G. Le; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2012) The effect of temperature on the hydration of composite cements containing limestone powder and fly ash. Materials and Structures
Academic article
Weerdt, Klaartje De; Eide, Mari Bøhnsdalen; Smeplass, Sverre; Wirthova, Micheala. (2012) The effect of stabilization with either filler or chemical stabilizer on the surface quality of concrete elements : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete. SINTEF Community SINTEF Community
Report

2011

Weerdt, Klaartje De; Vikan, Hedda Vestøl. (2011) Rheological properties of stabilized SCC – using fillers, admixtures or a combination : FA 2 Competitive constructions SP 2.1 Robust highly flowable concrete. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2011) Nordic Concrete rheology workshop : – Trondheim, Norway 3–4 October 2011 : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete and SP 2.3 High quality manufactured sand for concrete / Klaartje De Weerdt (editor). SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2011) Geopolymers – State of the art : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems. SINTEF Community SINTEF Community
Report
Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper
Østnor, Tone Anita; Weerdt, Klaartje De; Justnes, Harald; Bjøntegaard, Øyvind. (2011) Reactivity and microstructure of ternary cement pastes.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald; Lothenbach, Barbara; Haha, Mohsen Ben. (2011) The effect of limestone powder additions on strength and microstructure of fly ash blended cements.
Academic chapter/article/Conference paper
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda; Rudberg, Espen André; Weerdt, Klaartje De. (2011) Rheology of matrix with different crushed mineral fillers and admixtures.
Academic chapter/article/Conference paper
Weerdt, Klaartje De. (2011) Blended cement with reduced CO2 emission- utilizing the fly ash-limestone synergy. Norges teknisk-naturvitenskapelige universitet Doktoravhandlinger ved NTNU, 1503-8181 (2011:32)
Doctoral dissertation
Justnes, Harald; Østnor, Tone Anita; Weerdt, Klaartje De; Vikan, Hedda Vestøl. (2011) Calcined marl and clay as mineral addition for more sustainable concrete structures.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Kjellsen, Knut O.; Sellevold, Erik Johan; Justnes, Harald. (2011) Synergy between fly ash and limestone powder in ternary cements. Cement & Concrete Composites
Academic article
Weerdt, Klaartje De; Haha, M. Ben; Saout, G. Le; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2011) Hydration mechanisms of ternary Portland cement containing limestone powder and fly ash. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Justnes, Harald; Kjellsen, Knut O.. (2011) Synergetic effect between fly ash and limestone powder in Portland composite cement.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Sellevold, Erik Johan; Kjellsen, Knut O.; Justnes, Harald. (2011) Fly ash-limestone ternary cements: effect of component fineness. Advances in Cement Research
Academic article
Vikan, Hedda Vestøl; Weerdt, Klaartje De; Smeplass, Sverre. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper

2010

Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2010) Stability of SCC - chemical stabilisers versus filler : FA 2.1 Robust highly flowable concrete, SP 2.1.4 Workability. SINTEF Community SINTEF Community
Report
Haha, M. Ben; Weerdt, Klaartje De; Lothenbach, Barbara. (2010) Quanfification of the degree of reaction of fly ash. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Justnes, Harald; Kjellsen, Knut O.; Sellevold, Erik Johan. (2010) Fly ash-limestone ternary composite cements: synergetic effect at 28 days. Nordic Concrete Research
Academic article

2008

Weerdt, Klaartje De; Justnes, Harald. (2008) The reactivity of Fly Ash and Limestone in Cementitious Systems.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2008) Comparing Intergrinding and Separate Grinding of Blended Cements.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2008) Microstructure of Binder from the Pozzolanic Reaction between Lime and Siliceous Fly Ash, and the effect of Limestone Addition.
Academic chapter/article/Conference paper

2007

Weerdt, Klaartje De. (2007) Ternary Blended Cements with Fly Ash and Limestone. Part I: Activation of Fly Ash. State of the art. SINTEF Community SINTEF Community
Report

Journal publications

Lothenbach, Barbara; Krüger, Miriam E.; Ranger, Maxime; Bergmann, Ana; Hemstad, Petter; Lindgård, Jan. (2025) Report of RILEM TC 301-ASR: relation between pore solution composition and ASR expansion. Materials and Structures
Academic article
Krüger, Miriam E.; Heisig, Anne; Lode, Stefanie; Weerdt, Klaartje de; Machner, Alisa. (2025) The Distribution, Structure, and Chemical Composition of Alkali-Silica Gels in Calcined Clay Concretes. Buildings
Academic article
Weerdt, Klaartje de; Ranger, Maxime; Krüger, Miriam E.; Bergmann, Ana; Hemstad, Petter; Leemann, Andreas. (2025) Report of RILEM TC 301-ASR: Modelling the impact of SCMs, alkali level and w/b ratio on alkali concentration in pore solution. Materials and Structures
Academic article
Hazarika, Amrita; Huang, Liming; Erlingsson, Sigurdur; Weerdt, Klaartje de; Löfgren, Ingemar; Iftikhar, Sahar. (2025) Characterization, activation and reactivity – A case study of Nordic volcanic materials for application as Supplementary Cementitious Materials. Case Studies in Construction Materials
Academic article
Zuschlag, Pamela; Machner, Alisa Lydia; Hemstad, Petter; Kjellsen, Knut Ose; Zajac, Maciej; Haha, Mohsen Ben. (2024) Hydration of Composite Cements Containing Novel SCMs. Nordic Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Weerdt, Klaartje de. (2024) Distribution of sulphate and aluminium in hydrated cement pastes. Cement and Concrete Research
Academic article
Bary, Benoît; Machner, Alisa; Weerdt, Klaartje de. (2024) Simulation of chloride diffusion tests in cement paste and mortar made with CEM II and CEM VI cements. Cement and Concrete Research
Academic article
Hov, Sølve; Zabłocka, Kamila; Lopez, Ana Priscilla Paniagua; Weerdt, Klaartje de. (2024) Elemental mapping by micro X-ray fluorescence to assess binder distribution of improved soils. Géotechnique Letters
Academic article
Weerdt, Klaartje de; Bagheri, Mahsa; Lindgård, Jan; Lindstad, Hallvard; Rodrigues, A.; Duchesne, J.. (2024) Changes in cement paste during accelerated mortar bar testing for pyrrhotite containing aggregate. Cement and Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Kjellsen, Knut Ose; Weerdt, Klaartje de. (2024) The effect of varying cement replacement level on alkali metal distribution in cement pastes. Cement & Concrete Composites
Academic article
Gu, Yushan; Machner, Alisa; Weerdt, Klaartje de; Šajna, Aljoša; Hanžič, Lucija; Müller, Arnaud. (2023) Modeling the durability of novel cementitious materials prepared with CEM II/C-M exposed to drying and carbonation. Construction and Building Materials
Academic article
Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje. (2023) Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Wilson, William; Machner, Alisa; Georget, Fabien. (2023) Chloride profiles – What do they tell us and how should they be used?. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Bernard, Ellina; Kunther, Wolfgang; Pedersen, Malene Thostrup; Lothenbach, Barbara. (2023) Phase changes in cementitious materials exposed to saline solutions. Cement and Concrete Research
Academic article
Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; Weerdt, Klaartje De. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates and petrographic analysis. Critical review of the test method AAR-8. Materiales de construcción
Academic article
Babaahmadi, Arezou; Machner, Alisa; Kunther, Wolfgang; Figueira, João; Hemstad, Petter; Weerdt, Klaartje De. (2022) Chloride binding in Portland composite cements containing metakaolin and silica fume. Cement and Concrete Research
Academic article
Mery, Cristobal Javier Manquehual; Jakobsen, Pål Drevland; Holter, Karl Gunnar; Weerdt, Klaartje De; Danner, Tobias Alexander; Bruland, Amund. (2022) Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel. Construction and Building Materials
Academic article
Bitouri, Youssef El; Azéma, Nathalie; Saoût, Gwenn Le; Lauten, Rolf Andreas; Weerdt, Klaartje de. (2022) Effect of Plasticizer on Hydration and Rheological Behavior of Cement Pastes. CivilEng
Academic article
Fjendbo, Simon; Weerdt, Klaartje De; Sørensen, Henrik E.; Geiker, Mette Rica. (2022) When and How Should Chloride Profiles be Calibrated for Paste Fraction?. Nordic Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Geiker, Mette Rica. (2022) Å forutsi kloridinntrenging i betong i sjøvann. Byggeindustrien
Popular scientific article
Machner, Alisa; Bjørndal, Marie Helene; Justnes, Harald; Hanžič, Lucija; Šajna, Aljoša; Gu, Yushan. (2022) Effect of leaching on the composition of hydration phases during chloride exposure of mortar. Cement and Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2022) Correlating the development of chloride profiles and microstructural changes in marine concrete up to ten years. Cement & Concrete Composites
Academic article
Manquehual, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; Weerdt, Klaartje De; Bruland, Amund. (2022) Investigation of leaching in steel fiber-reinforced shotcrete exposed to fresh and saline groundwater in a subsea road tunnel. Cement and Concrete Research
Academic article
Gu, Yushan; Bary, Benoît; Machner, Alisa; Weerdt, Klaartje De; Bolte, Gerd; Haha, Mohsen Ben. (2022) Multi-scale strategy to estimate the mechanical and diffusive properties of cementitious materials prepared with CEM II/C-M. Cement & Concrete Composites
Academic article
Hanžič, Lucija; Robič, Sebastijan; Machner, Alisa; Bjørndal, Marie Helene; Weerdt, Klaartje De; Gu, Yushan. (2021) Experimental carbonation study for a durability assessment of novel cementitious materials. Materials
Academic article
Weerdt, Klaartje De. (2021) Chloride binding in concrete: recent investigations and recognised knowledge gaps: RILEM Robert L’Hermite Medal Paper 2021. Materials and Structures
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; Weerdt, Klaartje De; Geiker, Mette Rica. (2021) The square root method for chloride ingress prediction - Applicability and limitations. Materials and Structures
Academic article
Machner, Alisa Lydia; Bjørndal, Marie Helene; Šajna, Aljoša; Mikanovic, Nikola; Weerdt, Klaartje De. (2021) Impact of leaching on chloride ingress profiles in concrete. Materials and Structures
Academic article
Snellings, Ruben; Machner, Alisa Lydia; Bolte, Gerd; Kamyab, Hadi; Durdzinski, Pawel; Teck, Priscilla. (2021) Hydration kinetics of ternary slag-limestone cements: Impact of water to binder ratio and curing temperature. Cement and Concrete Research
Academic article
Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric; Bayle, Sandrine; Souche, Jean-Claude; Weerdt, Klaartje De. (2020) In vitro and in situ tests to evaluate the bacterial colonization of cementitious materials in the marine environment. Cement & Concrete Composites
Academic article
Hemstad, Petter; Machner, Alisa; Weerdt, Klaartje De. (2020) The effect of artificial leaching with HCl on chloride binding in ordinary Portland cement paste. Cement and Concrete Research
Academic article
Grimstad, Gustav; Lopez, Ana Priscilla Paniagua; Weerdt, Klaartje De. (2020) På vegen mot karbonnegativ stabil grunn. Byggeindustrien
Popular scientific article
Minerbe, Marielle Guéguen; Feugeas, Françoise; Lors, Christine; Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric. (2020) The influence of carbonation on the biocolonization of cementitious materials in the marine environment. Matériaux & Techniques
Academic article
Machner, Alisa; Bjørndal, Marie Helene; Weerdt, Klaartje De. (2019) Ny sement for bedre miljø. Byggeindustrien
Popular scientific article
Revert, Andres Belda; Hornbostel, Karla; Weerdt, Klaartje De; Geiker, Mette Rica. (2019) Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Lothenbach, Barbara; Geiker, Mette Rica. (2019) Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara. (2019) Effect of carbonation on the pore solution of mortar. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf A; Weerdt, Klaartje De. (2018) The effect of calcium lignosulfonate on ettringite formation in cement paste. Cement and Concrete Research
Academic article
Peng, Ya; Pedersen, Bård; Ng, Serina; Weerdt, Klaartje De; Jacobsen, Stefan. (2018) Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste. Nordic Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Weerdt, Klaartje De. (2018) Determining the free alkali metal content in concrete – Case study of an ASR-affected dam. Cement and Concrete Research
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2018) Impact of Accelerated Carbonation on Microstructure and Phase Assemblage. Nordic Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Chloride-binding capacity of hydrotalcite in cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2018) Stability of the hydrate phase assemblage in Portland composite cements containing dolomite and metakaolin after leaching, carbonation, and chloride exposure. Cement & Concrete Composites
Academic article
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles. (2018) Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and µXRF. MATEC Web of Conferences
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion: Investigation of the corrosion onset. Construction and Building Materials
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Armeringskorrosjon i miljøvennlig betong. Byggeindustrien
Popular scientific article
Machner, Alisa; Hemstad, Petter; Weerdt, Klaartje De. (2018) Towards the Understanding of the pH Dependency of the Chloride Binding of Portland Cement Pastes. Nordic Concrete Research
Academic article
Li, Xuerun; Snellings, Ruben; Antoni, Mathieu; Alderete, Natalia Mariel; Haha, Mohsen Ben; Bishnoi, Shashank. (2018) Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1. Materials and Structures
Academic article
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut O.; Geiker, Mette Rica; Weerdt, Klaartje De. (2017) Portland metakaolin cement containing dolomite or limestone – Similarities and differences in phase assemblage and compressive strength. Construction and Building Materials
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; Weerdt, Klaartje De. (2017) On the effect of calcium lignosulfonate on the rheology and setting time of cement paste. Cement and Concrete Research
Academic article
Machner, Alisa; Weerdt, Klaartje De; Geiker, Mette Rica; Kjellsen, Knut O.. (2017) Bedre egenskaper med dolomitt i sement. Byggeindustrien
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Enemark-Rasmussen, Kasper. (2017) Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution. Cement & Concrete Composites
Academic article
Hisdal, Jorun-Marie; Weerdt, Klaartje De; Strømmen, Ingvald; Kvande, Tore. (2017) UROP ruler. Byggeindustrien
Article in business/trade/industry journal
Weerdt, Klaartje De; Plusquellec, Gilles; Danner, Tobias; Geiker, Mette Rica. (2017) Ser betong i nytt lys med mikro-XRF. Byggeindustrien
Popular scientific article
Geiker, Mette Rica; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress. Nordic Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; Weerdt, Klaartje De. (2017) Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison. Cement and Concrete Research
Academic article
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Østnor, Tone Anita; Lothenbach, Barbara; Winnefeld, Frank. (2017) Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; Weerdt, Klaartje De. (2017) On the mechanisms of consumption of calcium lignosulfonate by cement paste. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Weerdt, Klaartje De. (2016) Plastifiserende stoffer til betong på nanonivå. Byggeindustrien
Popular scientific article
Weerdt, Klaartje de; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut concrete surfaces on chloride ingress resistance of concrete in marine splash zone. Sustainable Construction Materials and Technologies
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Carbonation Characterization of Mortar with Portland Cement and Fly Ash, Comparison of Techniques. Nordic Concrete Research
Academic article
Weerdt, Klaartje De; Orsakova, Denisa; Muller, Arnaud CA; Larsen, Claus K; Pedersen, Bård; Geiker, Mette Rica. (2016) Towards the understanding of chloride profiles in marine exposed concrete, impact of leaching and moisture content. Construction and Building Materials
Academic article
Jakobsen, Ulla Hjorth; Weerdt, Klaartje De; Geiker, Mette Rica. (2016) Elemental zonation in marine concrete. Cement and Concrete Research
Academic article
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Karbonatisering av miljøvennlig betong. Byggeindustrien
Popular scientific article
Plusquellec, Gilles; Geiker, Mette Rica; Duchesne, Josée; Lindgård, Jan; Weerdt, Klaartje De. (2016) Review of methods to determine the pH and the free alkali content of the pore solution in concrete. The International Conference on Alkali-Aggregate Reaction (ICAAR)
Academic article
Plusquellec, Gilles; Weerdt, Klaartje De. (2016) Alkalireaksjoner i betong - rollen til alkalier. Byggeindustrien
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Lothenbach, Barbara; Kaufmann, Josef; Kunther, Wolfgang. (2015) Durability of portland cement blends including calcined clay and limestone: Interactions with sulfate, chloride and carbonate ions. RILEM Bookseries
Academic article
Jensen, MM; Weerdt, Klaartje De; Johannesson, B; Geiker, Mette Rica. (2015) Use of a multi-species reactive transport model to simulate chloride ingress in mortar exposed to NaCl solution or sea-water. Computational Materials Science
Academic article
Weerdt, Klaartje De; Geiker, Mette Rica. (2015) Hvor er kloridene i betong?. Anleggsmagasinet
Popular scientific article
Weerdt, Klaartje De; Colombo, Alessia; Coppola, L.; Justnes, Harald; Geiker, Mette Rica. (2015) Impact of the associated cation on chloride binding of Portland cement paste. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Justnes, Harald. (2015) The effect of sea water on the phase assemblage of hydrated cement paste. Cement & Concrete Composites
Academic article
Peng, Ya; Jacobsen, Stefan; Weerdt, Klaartje De; Pedersen, Bård. (2014) Model and test methods for stability of fresh cement paste. Advances in Civil Engineering Materials
Academic article
Weerdt, Klaartje De; Justnes, Harald; Geiker, Mette Rica. (2014) Changes in the phase assemblage of concrete exposed to sea water. Cement & Concrete Composites
Academic article
Peng, Ya; Weerdt, Klaartje De; Pedersen, Bård; Jacobsen, Stefan. (2014) Measuring sedimentation and bleeding of fresh paste with hydrostatic pressure. Nordic Concrete Research
Academic article
Weerdt, Klaartje De; Orsáková, D.; Geiker, Mette Rica. (2014) The impact of sulphate and magnesium on chloride binding in Portland cement paste. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Haha, M. Ben; Saout, G. Le; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2012) The effect of temperature on the hydration of composite cements containing limestone powder and fly ash. Materials and Structures
Academic article
Weerdt, Klaartje De; Kjellsen, Knut O.; Sellevold, Erik Johan; Justnes, Harald. (2011) Synergy between fly ash and limestone powder in ternary cements. Cement & Concrete Composites
Academic article
Weerdt, Klaartje De; Haha, M. Ben; Saout, G. Le; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2011) Hydration mechanisms of ternary Portland cement containing limestone powder and fly ash. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Sellevold, Erik Johan; Kjellsen, Knut O.; Justnes, Harald. (2011) Fly ash-limestone ternary cements: effect of component fineness. Advances in Cement Research
Academic article
Haha, M. Ben; Weerdt, Klaartje De; Lothenbach, Barbara. (2010) Quanfification of the degree of reaction of fly ash. Cement and Concrete Research
Academic article
Weerdt, Klaartje De; Justnes, Harald; Kjellsen, Knut O.; Sellevold, Erik Johan. (2010) Fly ash-limestone ternary composite cements: synergetic effect at 28 days. Nordic Concrete Research
Academic article

Part of book/report

Bagheri, Mahsa; Lothenbach, Barbara; Lindgård, Jan; Haugen, Marit Kristin; Danner, Tobias; Pedersen, Bård. (2024) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Lindgård, Jan; Pedersen, Bård; Oberhardt, Nikolas; Wigum, Børge Johannes; Ullnæss, Inger Lise; Aasly, Kurt. (2024) Norwegian research project on pyrrhotite in concrete aggregates – aim and status.
Academic chapter/article/Conference paper
Rønning, Terje; Lindgård, Jan; Bagheri, Mahsa; Wigum, Børge Johannes; Danner, Tobias; Weerdt, Klaartje de. (2024) Alkalis Released from Aggregates – Significance for Concrete Performance Testing.
Academic chapter/article/Conference paper
Bagheri, Mahsa; Lindgård, Jan; Lothenbach, B.; Haugen, Marit Kristin; Danner, Tobias; Wigum, Børge Johannes. (2023) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Danner, Tobias; Weerdt, Klaartje De; Pedersen, Bård Magne; Lindgård, Jan. (2022) Investigations on the feasibility of the CWE method to verify potential alkali release from aggregates in Norwegian field concrete.
Academic chapter/article/Conference paper
Danner, Tobias; Norden, Geir; Weerdt, Klaartje De; Justnes, Harald. (2022) Low-Grade Kaolinite Clays for Sustainable Binders – Effect of mineralogy and curing temperature on hydration products.
Chapter
Weerdt, Klaartje De; Hemstad, Petter; Justnes, Harald; Østnor, Tone Anita; Rønning, Terje F.; Lindgård, Jan. (2022) Fundamental study on ASR kinetics - effect of temperature on aggregate reactivity and pore-water composition.
Academic chapter/article/Conference paper
Menéndez, Esperanza; Silva, António Santos; Duchesne, Josée; Berra, Mario; Weerdt, Klaartje De; Fernandes, Isabel. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates. Critical review of the test method AAR-8.
Academic chapter/article/Conference paper
Lindstad, Hallvard; Lindgård, Jan; Pedersen, Bård Magne; Wigum, Børge Johannes; Aasly, Kurt; Ullnæss, Inger Lise. (2022) Pyrrhotite in concrete aggregate. Introduction to mechanism, damage potential and ongoing research.
Academic chapter/article/Conference paper
Wigum, Børge Johannes; Lindgård, Jan; Weerdt, Klaartje De; Pedersen, Bård Magne; Rønning, Terje F.. (2022) Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research.
Academic chapter/article/Conference paper
Justnes, Harald; Weerdt, Klaartje De; Østnor, Tone Anita. (2021) Portland Clinker-Fly Ash Cements – Relation between Compressive Strength and Microstructure.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica; Plusquellec, Gilles; Lindgård, Jan; Duchsne, Josee; Fournier, Benoit. (2019) Strategies for Quantification of Alkali Metal Release from Aggregates in Concrete.
Academic chapter/article/Conference paper
Justnes, Harald; Weerdt, Klaartje De; Østnor, Tone Anita. (2019) Relation between strength of cements based on different clinkers and their microstructure.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion, impact of sampling technique on predicted service life.
Academic chapter/article/Conference paper
Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara; Weerdt, Klaartje De. (2018) Changes in pore solution composition in mortar due to carbonation.
Academic chapter/article/Conference paper
Machner, Alisa; Zajac, Maciej; Haha, Mohsen Ben; Kjellsen, Knut Ose; Geiker, Mette Rica; Weerdt, Klaartje De. (2017) Investigation of the products of the dolomite reaction in Portland cement pastes.
Academic chapter/article/Conference paper
Revert, Andres Belda; Geiker, Mette Rica; Weerdt, Klaartje De; Jakobsen, Ulla Hjorth. (2017) SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V.
Academic chapter/article/Conference paper
Danner, Tobias; Weerdt, Klaartje De; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE.
Academic chapter/article/Conference paper
Luong, Judy Yuen Wah; Aarstad, Kari; Weerdt, Klaartje De; Bjøntegaard, Øyvind. (2017) Excavated rock materials from tunnels for sprayed concrete.
Academic chapter/article/Conference paper
Revert, Andres Belda; Hornbostel, Karla; Weerdt, Klaartje De; Geiker, Mette Rica. (2017) Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique.
Academic chapter/article/Conference paper
Geiker, Mette Rica; Weerdt, Klaartje De; Garzón, Sergio Ferreiro; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater.
Academic chapter/article/Conference paper
Shi, Zhenguo; Geiker, Mette Rica; Weerdt, Klaartje De; Lothenbach, Barbara; Kaufmann, J.; Garzon, Sergio Ferreiro. (2016) Chloride resistance of Portland cement – calcined clay – limestone mortars.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut surface on chloride ingress resistance of concrete in marine splash zone.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2016) Investigation of the effect of partial replacement of Portland Cement by Fly Ash on carbonation using TGA and SEM-EDS.
Academic chapter/article/Conference paper
Shi, Z; Geiker, Mette Rica; Weerdt, Klaartje De; Østnor, Tone Anita; Lothenback, B.; Winnefeld, F.. (2016) Impact of cations on chloride binding in hydrated portland cement – metakaolin – limestone blends.
Academic chapter/article/Conference paper
Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; Weerdt, Klaartje De. (2015) Critical investigation of TGA sample preparation for composite cements.
Academic chapter/article/Conference paper
Colombo, Alessia; Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2015) Effect of fly ash on the consumption of lignosulfonate by cement paste.
Academic chapter/article/Conference paper
Revert, Andres Belda; Weerdt, Klaartje De; Geiker, Mette Rica. (2015) Carbonation front characterization: pH colour indicators.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2015) M-S-H formation in marine exposed concrete.
Academic chapter/article/Conference paper
Lothenbach, Barbara; Durdzinski, Pawel; Weerdt, Klaartje De. (2015) Thermogravimetric Analysis.
Academic chapter/article/Conference paper
Geiker, Mette Rica; Weerdt, Klaartje De; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Hendriks, Max; Larsen, Claus K. (2014) Prediction of reinforcement corrosion in concrete structures.
Academic chapter/article/Conference paper
Peng, Ya; Weerdt, Klaartje De; Pedersen, Bård; Jacobsen, Stefan. (2014) Hydrostatic pressure to measure sedimentation and bleeding.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2014) The Effect of Excessive Sea Water on the Phase Assemblage of Hydrated Cement Paste.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Ytterdal, Silje Gystad; Geiker, Mette Rica. (2014) On the impact of phase changes on chloride profiles in concrete.
Academic chapter/article/Conference paper
Colombo, Alessia; Danner, Tobias; Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Hammer, Tor Arne. (2014) Betong som ikke skiller seg.
Popular scientific chapter/article
Aarstad, Kari; Østnor, Tone Anita; Kaspersen, Kristin; Weerdt, Klaartje De. (2014) Snakker ikke nok om utseendet (betongoverflater).
Popular scientific chapter/article
Justnes, Harald; Weerdt, Klaartje De; Geiker, Mette Rica. (2013) CHLORIDE BINDINGS IN CONCRETE EXPOSED TO SEA WATER AND SALT SOLUTIONS.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald; Haha, Mohsen Ben; Kjellsen, Knut Ose. (2013) Fly-ash limestone synergy in triple cement.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica; Justnes, Harald. (2013) 10 year old concrete wall in tidal zone examined by SEM-EDS.
Academic chapter/article/Conference paper
Geiker, Mette Rica; Weerdt, Klaartje De; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Max, Hendriks. (2013) Levetid av armerte betongkonstruksjoner.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Colombo, Alessia; Geiker, Mette Rica. (2013) Impact of the associated cation on chloride binding in Portland cement paste.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) Modelling the reaction of fly ash and slag in blended cements.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) Changes in the phase assemblage of concrete exposed to seawater - case study.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Geiker, Mette Rica. (2012) On the application of thermodynamic modelling for the prediction of the hydrate assemblage formed by blended cements.
Academic chapter/article/Conference paper
Peng, Ya; Jacobsen, Stefan; Weerdt, Klaartje De; Pedersen, Bård; Marstrander, Britt Blom. (2012) Overview of Rheological Parameters Affecting Stability of SCC.
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper
Østnor, Tone Anita; Weerdt, Klaartje De; Justnes, Harald; Bjøntegaard, Øyvind. (2011) Reactivity and microstructure of ternary cement pastes.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald; Lothenbach, Barbara; Haha, Mohsen Ben. (2011) The effect of limestone powder additions on strength and microstructure of fly ash blended cements.
Academic chapter/article/Conference paper
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda; Rudberg, Espen André; Weerdt, Klaartje De. (2011) Rheology of matrix with different crushed mineral fillers and admixtures.
Academic chapter/article/Conference paper
Justnes, Harald; Østnor, Tone Anita; Weerdt, Klaartje De; Vikan, Hedda Vestøl. (2011) Calcined marl and clay as mineral addition for more sustainable concrete structures.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald; Kjellsen, Knut O.. (2011) Synergetic effect between fly ash and limestone powder in Portland composite cement.
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; Weerdt, Klaartje De; Smeplass, Sverre. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2008) The reactivity of Fly Ash and Limestone in Cementitious Systems.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2008) Comparing Intergrinding and Separate Grinding of Blended Cements.
Academic chapter/article/Conference paper
Weerdt, Klaartje De; Justnes, Harald. (2008) Microstructure of Binder from the Pozzolanic Reaction between Lime and Siliceous Fly Ash, and the effect of Limestone Addition.
Academic chapter/article/Conference paper

Report

Danielsen, Svein Willy; Hagelia, Per; Wigum, Børge Johannes; Weerdt, Klaartje De; Aasly, Kurt; Lindgård, Jan. (2019) Magnetkis i betongtilslag. Effekt på betongs bestandighet. Statens vegvesen Statens vegvesen
Report
Revert, Andres Belda; Weerdt, Klaartje De; Hornbostel, Karla; Geiker, Mette Rica. (2017) State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Plusquellec, Gilles; Weerdt, Klaartje De. (2017) Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Weerdt, Klaartje De; Plusquellec, Gilles; Lindgård, Jan; Wigum, Børge Johannes; Kermit, Peter Holiman. (2017) Determining alkali content in ASR performance-tested concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Weerdt, Klaartje De; Hepsøe, Per Martin; Lindgård, Jan. (2017) Relative humidity measurements in concrete. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Vurucu, Havvagul; Weerdt, Klaartje De; Plusquellec, Gilles. (2016) Alkali-silica reaction in concrete dams: Alkali leaching in the Votna dam. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Weerdt, Klaartje De; Geiker, Mette Rica. (2016) Workshop on Moisture in Concrete, Trondheim, Norway 6–7 February 2012. Measurement of moisture and relative humidity in concrete. FA 3 Technical performance. FA 3.2 Service life. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Weerdt, Klaartje De; Geiker, Mette Rica; Orsakova, Denisa. (2015) Investigation of concrete from Solsvik field station - 4 concrete cores investigated after 16 years of submerged exposure. Norwegian Public Roads Administration Report Norwegian Public Roads Administration Report
Report
Hammer, Tor Arne; Kjellmark, Gunrid; Smeplass, Sverre; Weerdt, Klaartje De. (2015) Practical methods to assess segregation risk of SCC on site. FA: Competitive constructions. SP 2.1 Robust and highly flowable concrete with controlled surface quality. SINTEF Byggforsk SINTEF Byggforsk
Report
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald. (2015) Microstructure of clinker – fly ash interactions. SINTEF Community SINTEF Community
Report
Østnor, Tone Anita; Aarstad, Kari; Kaspersen, Kristin; Weerdt, Klaartje De. (2014) Brukermanual for BetongGUI – analyse og karakterisering av porer på betongoverflaten. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Martius-Hammer, Tor Arne; Smeplass, Sverre; Weerdt, Klaartje De; Peng, Ya. (2013) Stability of SCC – robustness for changes in water content and sand grading. FA 2 Competitive constructions. SP 2.1 Robust highly flowable concrete. SINTEF akademisk forlag SINTEF akademisk forlag
Report
Weerdt, Klaartje De; Østnor, Tone Anita; Justnes, Harald. (2013) Fly ash – Limestone Synergy in Ternary Cements. FA 1 Environmentally friendly concrete. SP 1.1 Low carbon-footprint binder systems. SINTEF Community SINTEF Community
Report
Wirthova, Michaela; Weerdt, Klaartje De; Jacobsen, Stefan. (2013) Static yield stress measurements on SCC, mortar and matrix. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Kaspersen, Kristin; Østnor, Tone Anita; Eide, Mari Bøhnsdalen; Weerdt, Klaartje De. (2012) Characterisation of concrete surfaces in Askimporten tunnel: COIN project report 45 - 2012. SINTEF Community SINTEF Community
Report
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2012) Rheology of matrix and SCC with different mineral fillers and admixtures : FA 2 Competitive constructions : SP 2.1 High quality manufactured sand for concrete. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De; Eide, Mari Bøhnsdalen; Smeplass, Sverre; Wirthova, Micheala. (2012) The effect of stabilization with either filler or chemical stabilizer on the surface quality of concrete elements : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De; Vikan, Hedda Vestøl. (2011) Rheological properties of stabilized SCC – using fillers, admixtures or a combination : FA 2 Competitive constructions SP 2.1 Robust highly flowable concrete. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2011) Nordic Concrete rheology workshop : – Trondheim, Norway 3–4 October 2011 : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete and SP 2.3 High quality manufactured sand for concrete / Klaartje De Weerdt (editor). SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2011) Geopolymers – State of the art : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2011) Blended cement with reduced CO2 emission- utilizing the fly ash-limestone synergy. Norges teknisk-naturvitenskapelige universitet Doktoravhandlinger ved NTNU, 1503-8181 (2011:32)
Doctoral dissertation
Vikan, Hedda Vestøl; Weerdt, Klaartje De. (2010) Stability of SCC - chemical stabilisers versus filler : FA 2.1 Robust highly flowable concrete, SP 2.1.4 Workability. SINTEF Community SINTEF Community
Report
Weerdt, Klaartje De. (2007) Ternary Blended Cements with Fly Ash and Limestone. Part I: Activation of Fly Ash. State of the art. SINTEF Community SINTEF Community
Report

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