2025

• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel

2024

• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel
• Zuschlag, Pamela; Machner, Alisa Lydia; Hemstad, Petter; Kjellsen, Knut Ose; Zajac, Maciej; Ben Haha, Mohsen. (2024) Hydration of Composite Cements Containing Novel SCMs. Nordic Concrete Research
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• Rønning, Terje; Lindgård, Jan; Bagheri, Mahsa; Wigum, Børge Johannes; Danner, Tobias; Weerdt, Klaartje de. (2024) Alkalis Released from Aggregates – Significance for Concrete Performance Testing. Springer
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Hov, Sølve; Zabłocka, Kamila; Paniagua Lopez, Ana Priscilla; Weerdt, Klaartje de. (2024) Elemental mapping by micro X-ray fluorescence to assess binder distribution of improved soils. Géotechnique Letters
  Vitenskapelig artikkel
• Hemstad, Petter; Lothenbach, Barbara; Weerdt, Klaartje de. (2024) Distribution of sulphate and aluminium in hydrated cement pastes. Cement and Concrete Research
  Vitenskapelig artikkel

2023

• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• 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 .
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel

2022

• Danner, Tobias; De Weerdt, Klaartje; 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• Wigum, Børge Johannes; Lindgård, Jan; De Weerdt, Klaartje; Pedersen, Bård Magne; Rønning, Terje F.. (2022) Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Manquehual, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• Gu, Yushan; Bary, Benoît; Machner, Alisa; De Weerdt, Klaartje; Bolte, Gerd; Ben Haha, Mohsen. (2022) Multi-scale strategy to estimate the mechanical and diffusive properties of cementitious materials prepared with CEM II/C-M. Cement & Concrete Composites
  Vitenskapelig artikkel
• Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje. (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
  Vitenskapelig artikkel
• 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• El Bitouri, Youssef; Azéma, Nathalie; Le Saoût, Gwenn; Lauten, Rolf Andreas; Weerdt, Klaartje de. (2022) Effect of Plasticizer on Hydration and Rheological Behavior of Cement Pastes. CivilEng
  Vitenskapelig artikkel
• Fjendbo, Simon; De Weerdt, Klaartje; Sørensen, Henrik E.; Geiker, Mette Rica. (2022) When and How Should Chloride Profiles be Calibrated for Paste Fraction?. Nordic Concrete Research
  Vitenskapelig artikkel
• Danner, Tobias; Norden, Geir; De Weerdt, Klaartje; Justnes, Harald. (2022) Low-Grade Kaolinite Clays for Sustainable Binders – Effect of mineralogy and curing temperature on hydration products.
  Faglig kapittel
• Babaahmadi, Arezou; Machner, Alisa; Kunther, Wolfgang; Figueira, João; Hemstad, Petter; De Weerdt, Klaartje. (2022) Chloride binding in Portland composite cements containing metakaolin and silica fume. Cement and Concrete Research
  Vitenskapelig artikkel
• Menéndez, Esperanza; Silva, António Santos; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje; Fernandes, Isabel. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates. Critical review of the test method AAR-8.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• 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
  Vitenskapelig artikkel
• Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2022) Å forutsi kloridinntrenging i betong i sjøvann. Byggeindustrien
  Populærvitenskapelig artikkel
• Manquehual Mery, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel

2021

• Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2021) Portland Clinker-Fly Ash Cements – Relation between Compressive Strength and Microstructure. American Concrete Institute
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje. (2021) Chloride binding in concrete: recent investigations and recognised knowledge gaps: RILEM Robert L’Hermite Medal Paper 2021. Materials and Structures
  Vitenskapelig artikkel
• 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
  Vitenskapelig artikkel
• Hanžič, Lucija; Robič, Sebastijan; Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje; Gu, Yushan. (2021) Experimental carbonation study for a durability assessment of novel cementitious materials. Materials
  Vitenskapelig artikkel
• Machner, Alisa Lydia; Bjørndal, Marie Helene; Šajna, Aljoša; Mikanovic, Nikola; De Weerdt, Klaartje. (2021) Impact of leaching on chloride ingress profiles in concrete. Materials and Structures
  Vitenskapelig artikkel
• Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2021) The square root method for chloride ingress prediction - Applicability and limitations. Materials and Structures
  Vitenskapelig artikkel

2020

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

2019

• De Weerdt, Klaartje; Lothenbach, Barbara; Geiker, Mette Rica. (2019) Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar. Cement and Concrete Research
  Vitenskapelig artikkel
• Danielsen, Svein Willy; Hagelia, Per; Wigum, Børge Johannes; De Weerdt, Klaartje; Aasly, Kurt; Lindgård, Jan. (2019) Magnetkis i betongtilslag. Effekt på betongs bestandighet. Nordic Concrete Research (463)
  Rapport
• De Weerdt, Klaartje; Geiker, Mette Rica; Plusquellec, Gilles; Lindgård, Jan; Duchsne, Josee; Fournier, Benoit. (2019) Strategies for Quantification of Alkali Metal Release from Aggregates in Concrete. Rilem publications
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Plusquellec, Gilles; Belda Revert, Andres; Geiker, Mette Rica; Lothenbach, Barbara. (2019) Effect of carbonation on the pore solution of mortar. Cement and Concrete Research
  Vitenskapelig artikkel
• Belda Revert, Andres; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2019) Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism. Cement and Concrete Research
  Vitenskapelig artikkel
• Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2019) Relation between strength of cements based on different clinkers and their microstructure.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje. (2019) Ny sement for bedre miljø. Byggeindustrien
  Populærvitenskapelig artikkel

2018

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

2017

• Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• Hisdal, Jorun-Marie; De Weerdt, Klaartje; Strømmen, Ingvald; Kvande, Tore. (2017) UROP ruler. Byggeindustrien
  Fagartikkel
• De Weerdt, Klaartje; Hepsøe, Per Martin; Lindgård, Jan. (2017) Relative humidity measurements in concrete. NTNU
  Mastergradsoppgave
• Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2017) State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete. NTNU
  Rapport
• Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; De Weerdt, Klaartje. (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
  Vitenskapelig artikkel
• Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the effect of calcium lignosulfonate on the rheology and setting time of cement paste. Cement and Concrete Research
  Vitenskapelig artikkel
• Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut O.; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Portland metakaolin cement containing dolomite or limestone – Similarities and differences in phase assemblage and compressive strength. Construction and Building Materials
  Vitenskapelig artikkel
• Revert, Andres Belda; Geiker, Mette Rica; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla. (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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Revert, Andres Belda; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Plusquellec, Gilles; Lindgård, Jan; Wigum, Børge Johannes; Kermit, Peter Holiman. (2017) Determining alkali content in ASR performance-tested concrete. NTNU
  Mastergradsoppgave
• Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress. Nordic Concrete Research
  Vitenskapelig artikkel
• Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Investigation of the products of the dolomite reaction in Portland cement pastes.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Plusquellec, Gilles; Danner, Tobias; Geiker, Mette Rica. (2017) Ser betong i nytt lys med mikro-XRF. Byggeindustrien
  Populærvitenskapelig artikkel
• Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the mechanisms of consumption of calcium lignosulfonate by cement paste. Cement and Concrete Research
  Vitenskapelig artikkel
• Plusquellec, Gilles; De Weerdt, Klaartje. (2017) Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition. NTNU
  Rapport
• Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Luong, Judy Yuen Wah; Aarstad, Kari; De Weerdt, Klaartje; Bjøntegaard, Øyvind. (2017) Excavated rock materials from tunnels for sprayed concrete.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Machner, Alisa; De Weerdt, Klaartje; Geiker, Mette Rica; Kjellsen, Knut O.. (2017) Bedre egenskaper med dolomitt i sement. Byggeindustrien
  Populærvitenskapelig artikkel

2016

• 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
  Vitenskapelig artikkel
• Shi, Z; Geiker, Mette Rica; De Weerdt, Klaartje; Østnor, Tone Anita; Lothenback, B.; Winnefeld, F.. (2016) Impact of cations on chloride binding in hydrated portland cement – metakaolin – limestone blends.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Carbonation Characterization of Mortar with Portland Cement and Fly Ash, Comparison of Techniques. Nordic Concrete Research
  Vitenskapelig artikkel
• Plusquellec, Gilles; De Weerdt, Klaartje. (2016) Alkalireaksjoner i betong - rollen til alkalier. Byggeindustrien
  Populærvitenskapelig artikkel
• Plusquellec, Gilles; Geiker, Mette Rica; Duchesne, Josée; Lindgård, Jan; De Weerdt, Klaartje. (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)
  Vitenskapelig artikkel
• De Weerdt, Klaartje; 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.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Lothenbach, Barbara; Kaufmann, J.; Garzon, Sergio Ferreiro. (2016) Chloride resistance of Portland cement – calcined clay – limestone mortars.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Revert, Andres Belda; De Weerdt, Klaartje; 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. Rilem publications
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Vurucu, Havvagul; De Weerdt, Klaartje; Plusquellec, Gilles. (2016) Alkali-silica reaction in concrete dams: Alkali leaching in the Votna dam. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
  Mastergradsoppgave
• Colombo, Alessia; Geiker, Mette Rica; De Weerdt, Klaartje. (2016) Plastifiserende stoffer til betong på nanonivå. Byggeindustrien
  Populærvitenskapelig artikkel
• De Weerdt, Klaartje; 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 COIN Projet report (81)
  Rapport
• Jakobsen, Ulla Hjorth; De Weerdt, Klaartje; Geiker, Mette Rica. (2016) Elemental zonation in marine concrete. Cement and Concrete Research
  Vitenskapelig artikkel
• Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Karbonatisering av miljøvennlig betong. Byggeindustrien
  Populærvitenskapelig artikkel
• De Weerdt, Klaartje; 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
  Vitenskapelig artikkel

2015

• De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald. (2015) Microstructure of clinker – fly ash interactions. COIN Projet report (69)
  Rapport
• Revert, Andres Belda; De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Carbonation front characterization: pH colour indicators.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; De Weerdt, Klaartje. (2015) Critical investigation of TGA sample preparation for composite cements.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Hvor er kloridene i betong?. Anleggsmagasinet
  Populærvitenskapelig artikkel
• Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• Hammer, Tor Arne; Kjellmark, Gunrid; Smeplass, Sverre; De Weerdt, Klaartje. (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. COIN Projet report (59)
  Rapport
• De Weerdt, Klaartje; Geiker, Mette Rica; Orsakova, Denisa. (2015) Investigation of concrete from Solsvik field station - 4 concrete cores investigated after 16 years of submerged exposure. Statens vegvesens rapporter (353)
  Rapport
• De Weerdt, Klaartje; 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
  Vitenskapelig artikkel
• De Weerdt, Klaartje; Justnes, Harald. (2015) The effect of sea water on the phase assemblage of hydrated cement paste. Cement & Concrete Composites
  Vitenskapelig artikkel
• De Weerdt, Klaartje; Justnes, Harald; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2015) M-S-H formation in marine exposed concrete.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Colombo, Alessia; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2015) Effect of fly ash on the consumption of lignosulfonate by cement paste.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Lothenbach, Barbara; Durdzinski, Pawel; De Weerdt, Klaartje. (2015) Thermogravimetric Analysis. CRC Press
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Jensen, MM; De Weerdt, Klaartje; 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
  Vitenskapelig artikkel

2014

• De Weerdt, Klaartje; Justnes, Harald. (2014) The Effect of Excessive Sea Water on the Phase Assemblage of Hydrated Cement Paste.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Measuring sedimentation and bleeding of fresh paste with hydrostatic pressure. Nordic Concrete Research
  Vitenskapelig artikkel
• De Weerdt, Klaartje; Orsáková, D.; Geiker, Mette Rica. (2014) The impact of sulphate and magnesium on chloride binding in Portland cement paste. Cement and Concrete Research
  Vitenskapelig artikkel
• Colombo, Alessia; Danner, Tobias ; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Hydrostatic pressure to measure sedimentation and bleeding.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Aarstad, Kari; Østnor, Tone Anita; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Snakker ikke nok om utseendet (betongoverflater). SINTEF akademisk forlag
  Populærvitenskapelig kapittel/artikkel
• De Weerdt, Klaartje; Hammer, Tor Arne. (2014) Betong som ikke skiller seg. SINTEF akademisk forlag
  Populærvitenskapelig kapittel/artikkel
• Østnor, Tone Anita; Aarstad, Kari; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Brukermanual for BetongGUI – analyse og karakterisering av porer på betongoverflaten. SINTEF akademisk forlag COIN Projet report (51)
  Rapport
• Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Hendriks, Max ; Larsen, Claus K. (2014) Prediction of reinforcement corrosion in concrete structures.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Ytterdal, Silje Gystad; Geiker, Mette Rica. (2014) On the impact of phase changes on chloride profiles in concrete.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Justnes, Harald; Geiker, Mette Rica. (2014) Changes in the phase assemblage of concrete exposed to sea water. Cement & Concrete Composites
  Vitenskapelig artikkel
• Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård. (2014) Model and test methods for stability of fresh cement paste. Advances in Civil Engineering Materials
  Vitenskapelig artikkel

2013

• Martius-Hammer, Tor Arne; Smeplass, Sverre; De Weerdt, Klaartje; 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. COIN Projet report (47)
  Rapport
• De Weerdt, Klaartje; 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. COIN Projet report (46)
  Rapport
• Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Max, Hendriks. (2013) Levetid av armerte betongkonstruksjoner.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Colombo, Alessia; Geiker, Mette Rica. (2013) Impact of the associated cation on chloride binding in Portland cement paste.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Justnes, Harald; De Weerdt, Klaartje; Geiker, Mette Rica. (2013) CHLORIDE BINDINGS IN CONCRETE EXPOSED TO SEA WATER AND SALT SOLUTIONS. Rilem publications
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald; Ben Haha, Mohsen; Kjellsen, Knut Ose. (2013) Fly-ash limestone synergy in triple cement.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Wirthova, Michaela; De Weerdt, Klaartje; Jacobsen, Stefan. (2013) Static yield stress measurements on SCC, mortar and matrix. NTNU, Dept of Structural Engineering
  Rapport
• De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2013) 10 year old concrete wall in tidal zone examined by SEM-EDS.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2012

• De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; 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
  Vitenskapelig artikkel
• Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård; Marstrander, Britt Blom. (2012) Overview of Rheological Parameters Affecting Stability of SCC. American Concrete Institute
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Modelling the reaction of fly ash and slag in blended cements.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Changes in the phase assemblage of concrete exposed to seawater - case study.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje. (2012) 50 prosent mindre CO2-utslipp med lavkarbonsement. Murmesteren
  Intervju tidsskrift
• De Weerdt, Klaartje; 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. COIN Projet report (39)
  Rapport
• De Weerdt, Klaartje; Geiker, Mette Rica. (2012) On the application of thermodynamic modelling for the prediction of the hydrate assemblage formed by blended cements.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Kaspersen, Kristin; Østnor, Tone Anita; Eide, Mari Bøhnsdalen; De Weerdt, Klaartje. (2012) Characterisation of concrete surfaces in Askimporten tunnel: COIN project report 45 - 2012. COIN Projet report (45)
  Rapport
• Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; De Weerdt, Klaartje. (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. COIN Projet report (41)
  Rapport

2011

• De Weerdt, Klaartje. (2011) Blended Cement with Reduced CO2 Emission - Utilizing the Fly Ash - Limestone Synergy. Tapir Akademisk Forlag Tapir Akademisk Forlag
  Doktorgradsavhandling
• De Weerdt, Klaartje; Kjellsen, Knut O.; Sellevold, Erik Johan; Justnes, Harald. (2011) Synergy between fly ash and limestone powder in ternary cements. Cement & Concrete Composites
  Vitenskapelig artikkel
• Justnes, Harald; Østnor, Tone Anita; De Weerdt, Klaartje; Vikan, Hedda Vestøl. (2011) Calcined marl and clay as mineral addition for more sustainable concrete structures. CI-Premier Pte Ltd
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Vikan, Hedda Vestøl; De Weerdt, Klaartje; Smeplass, Sverre. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures. Rilem publications
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Justnes, Harald; Lothenbach, Barbara; Ben Haha, Mohsen. (2011) The effect of limestone powder additions on strength and microstructure of fly ash blended cements. Consejo Superior de Investigaciones Científicas (CSIC)
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Østnor, Tone Anita; De Weerdt, Klaartje; Justnes, Harald; Bjøntegaard, Øyvind. (2011) Reactivity and microstructure of ternary cement pastes. Consejo Superior de Investigaciones Científicas (CSIC)
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Sellevold, Erik Johan; Kjellsen, Knut O.; Justnes, Harald. (2011) Fly ash-limestone ternary cements: effect of component fineness. Advances in Cement Research
  Vitenskapelig artikkel
• Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda; Rudberg, Espen André; De Weerdt, Klaartje. (2011) Rheology of matrix with different crushed mineral fillers and admixtures.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.. (2011) Synergetic effect between fly ash and limestone powder in Portland composite cement.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2011) Hydration mechanisms of ternary Portland cement containing limestone powder and fly ash. Cement and Concrete Research
  Vitenskapelig artikkel
• De Weerdt, Klaartje; 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. COIN Projet report (38)
  Rapport
• De Weerdt, Klaartje. (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). COIN Projet report (35)
  Rapport
• De Weerdt, Klaartje. (2011) Geopolymers – State of the art : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems. COIN Projet report (37)
  Rapport

2010

• De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.; Sellevold, Erik Johan. (2010) Fly ash-limestone ternary composite cements: synergetic effect at 28 days. Nordic Concrete Research
  Vitenskapelig artikkel
• Ben Haha, M.; De Weerdt, Klaartje; Lothenbach, Barbara. (2010) Quanfification of the degree of reaction of fly ash. Cement and Concrete Research
  Vitenskapelig artikkel
• Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2010) Stability of SCC - chemical stabilisers versus filler : FA 2.1 Robust highly flowable concrete, SP 2.1.4 Workability. COIN Projet report (25)
  Rapport

2008

• De Weerdt, Klaartje; Justnes, Harald. (2008) The reactivity of Fly Ash and Limestone in Cementitious Systems.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Justnes, Harald. (2008) Comparing Intergrinding and Separate Grinding of Blended Cements.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• De Weerdt, Klaartje; Justnes, Harald. (2008) Microstructure of Binder from the Pozzolanic Reaction between Lime and Siliceous Fly Ash, and the effect of Limestone Addition.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2007

• De Weerdt, Klaartje. (2007) Ternary Blended Cements with Fly Ash and Limestone. Part I: Activation of Fly Ash. State of the art. SINTEF Rapport (SBF BK A07023)
  Rapport