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Reactive dicalcium silicate binders: Microstructure and transport properties
The calcium silicate hydrates (C-S-H) are without doubt one of the most important hydration products in a hardened cement paste. Giving the complexity of the microstructure that forms by hydration of ordinary Portland cement (OPC) and the more recently use ...
EPFL2022Resistance of cementitious materials to sulfate attack: quantifying performance with a reliable unidirectional approach
Depending on the environmental conditions, concrete materials can come into contact with sulfate ions which are widely present in rivers, underground water, sewers, seawater and soil. Sulfates can react with the cement paste in concrete and cause damage wh ...
EPFL2022Towards tailored cement-based materials with ground calcium carbonates
Emmanuel Denarié, Lionel Sofia
Proportioning the dosage of Ground Calcium Carbonates (GCC) in cementitious materials, beyond current normative levels, is one of the most promising ways towards sustainability of mortar and concrete technology. Performance parameters such as the water/bin ...
2021A Contribution to the Design of Textile Reinforced Concrete Structures
The reduction of green-house gas emissions is one of the global challenges that our society is facing and the production of cement plays a major role because concrete is the most used material worldwide. For every 1000 kg of cement produced, 900 kg of CO2, ...
EPFL2020Opération Béton
By studying approximately a century of cement and concrete in Switzerland, this project examines the relations between institutions, discourse, and technology as they intersect in the material. The project is framed so that the establishment of organizatio ...
ETH Zurich2020Characterization of interfacial transition zone in concrete prepared with carbonated modeled recycled concrete aggregates
Treatment by accelerated carbonation has been widely studied to enhance the quality of recycled concrete aggregates (RCA) and hence the performance of new concrete produced with the RCA. This is often ascribed to the densification of RCA. This study invest ...
PERGAMON-ELSEVIER SCIENCE LTD2020Evolution of microstructural changes in cement paste during environmental drying
Karen Scrivener, Fabien Jacques Michel Georget, Hamed Maraghechi, Wioletta Soja
Exposure of concrete to the atmosphere changes the microstructure of the cement paste. However, knowledge about the alteration of the porosity due to drying is typically not considered in deterioration processes of the hardened cement paste. The purpose of ...
PERGAMON-ELSEVIER SCIENCE LTD2020Environmental impacts and decarbonization strategies in the cement and concrete industries
Karen Scrivener, Aurélie Rosine Favier
The use of cement and concrete, among the most widely used man-made materials, is under scrutiny. Owing to their large-scale use, production of cement and concrete results in substantial emission of greenhouse gases and places strain on the availability of ...
2020Understanding the carbonation of concrete with supplementary cementitious materials: a critical review by RILEM TC 281-CCC
Karen Scrivener, Barbara Lothenbach
Blended cements, where Portland cement clinker is partially replaced by supplementary cementitious materials (SCMs), provide the most feasible route for reducing carbon dioxide emissions associated with concrete production. However, lowering the clinker co ...
SPRINGER2020Concrete Performance of Limestone Calcined Clay Cement (LC3) Compared with Conventional Cements
Karen Scrivener, Lionel Sofia, François Henri Avet
This study aims to demonstrate the robustness of concrete made of limestone calcined clay cement (LC3). Two campaigns were carried out using 375 kg.m(-3) and 500 kg.m(-3) of binder and targeting plastic and self-placing workability, respectively. The concr ...
AMER SOC TESTING MATERIALS2019