Publications de Theodor Alexandre Emmanuele Chappex

The Effect of Aluminum in Solution on the Dissolution of Amorphous Silica and its Relation to Cementitious Systems

Karen Scrivener, Theodor Alexandre Emmanuele Chappex

One of the most serious causes of degradation of concrete is the alkalisilica reaction. Amorphous silicates present in certain aggregates react with the alkaline pore solution of the concrete to form a gel, which absorbs water and swells, leading to the ex ...

Wiley-Blackwell2013

Alkali fixation of C-S-H in blended cement pastes and its relation to alkali silica reaction

Karen Scrivener, Theodor Alexandre Emmanuele Chappex

Supplementary cementitious materials (SCM) are known to reduce or even stop expansion due to alkali silica reaction (ASR) in concretes with reactive aggregates. Studies indicate that the main reason for this is the decrease in alkalinity of the pore soluti ...

Pergamon-Elsevier Science Ltd2012

The influence of aluminium on the dissolution of amorphous silica and its relation to alkali silica reaction

Karen Scrivener, Theodor Alexandre Emmanuele Chappex

It is known that the addition of supplementary cementitious materials (SCMs) in concretes reduces or even stops expansion due to alkali silica reaction (ASR). It has been widely shown that the main mechanism controlling ASR in blends is the alkali fixation ...

Pergamon-Elsevier Science Ltd2012

The role of aluminium from supplementary cementitious materials in controlling alkali-silica reaction

Theodor Alexandre Emmanuele Chappex

Alkali silica reaction (ASR) is a long-term reaction between certain aggregates containing amorphous silicate phases and the alkalis from the cement paste. These silicates react with the alkalis present in the pore solution of the cement paste and form an ...

EPFL2012

Controlling Alkali Silica Reaction by understanding alkalis fixation in C-S-H

Karen Scrivener, Theodor Alexandre Emmanuele Chappex

2011

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