The use of silica rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials. At the levels of substitution normally used, major changes are the lower Ca/Si ratio in the C-S-H ...

Pergamon-Elsevier Science Ltd2011

Physical and microstructural aspects of iron sulfide degradation in concrete

Karen Scrivener, Emmanuel Gallucci

The microstructural aspects of iron sulfide degradation in dam concrete were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) in both dam concrete samples and laboratory concrete. The results show that iron sulfid ...

Pergamon-Elsevier Science Ltd2011

Challenges in Modeling Cementitious Materials

Karen Scrivener

In order to meet the demands of sustainable development the range of cementitious materials used will need to become more diverse. To master the use of this range of materials, modelling has an essential role to play in linking composition and processing t ...

R I L E M Publications, 91 Ave President Wilson, 94235 Cachen, France2010

Fred glasser cement science symposium

Karen Scrivener

2010

Influence of the gypsum conetent on the phase assemblage and the microstructure of tricalcium aluminate - gypsum pastes

Karen Scrivener, Alexandra Quennoz

2010

Micro-mechanical modelling of alkali-silica-reaction-induced degradation using the AMIE framework

Cyrille Dunant, Karen Scrivener

AMIE. a finite element/extended finite element framework, has been designed to provide the tools to run detailed microstructural simulations; this paper demonstrates the possibility of simulating the mechanisms underlying the alkali-silica-reaction (ASR). ...

Pergamon-Elsevier Science Ltd2010

Investigation of Cement Substitution by Combined Addition of Calcined Clays and Limestone

Mathieu Antoni, Karen Scrivener, John Espen Rossen

2010

Hydration of roman cements used for architectural restoration

Karen Scrivener, Christophe Gosselin

2010

Effect of mixing on early hydration of cementitous systems

Patrick Juilland, Karen Scrivener, Emmanuel Gallucci, Ajay Kumar

2010

Mechanisms of cement hydration

Karen Scrivener

The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of tricalc ...

Pergamon-Elsevier Science Ltd2010

Editorial

Karen Scrivener

Pergamon-Elsevier Science Ltd2010

Contrôle de la réaction alcali silice par l’immobilisation des alcalins dans le C-S-H à l’aide d’additions minérales

Karen Scrivener, Theodor Alexandre Emmanuele Chappex

2010

Early age strength enhancement of blended cement systems by CaCl2 and diethanol-isopropanolamine

Karen Scrivener

The enhancement of the 1 day strength of cementinous systems by a combination of calcium chlonde (CaCl2) and diethanol-isopropanolamine (DEIPA) was studied, particularly in blended cement systems A combination of quantitative X-ray diffraction with Rietvel ...

Pergamon-Elsevier Science Ltd2010

Influence of self heating and Li2SO4 addition on the microstructural development of calcium aluminate cement

Karen Scrivener, Emmanuel Gallucci, Christophe Gosselin

Hydrated Calcium Aluminate Cement (CAC) is known to have a complex microstructure involving different phase assemblages strongly dependant on the temperature. This work presents an experimental approach to study the microstructure of CAC pastes from the fi ...

Pergamon-Elsevier Science Ltd2010

Decoupling method for heat evolution curves of model cements - Influence of the presence of C3A-gypsum on the alite hydration

Cyrille Dunant, Karen Scrivener, Emmanuel Gallucci, Alexandra Quennoz

2010

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