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1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels 2 P2MC-ENSMSE - Département Poudres et Matériaux Multi-Composants 3 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires 4 PC2M - Physico-Chimie des Matériaux Multicomposants 5 GEMPPM - Groupe d-études de métallurgie physique et de physique des matériaux

Abstract : This paper is about the influence of polysaccharides on cement hydration. Three polysaccharides were studied: a cellulose ether CE, a starch ether SE and a dextrin YD. In a concentrated media as well as in a dilute media, admixture CE only revealed a slight effect on cement hydration. Portlandite and ettringite formation and gypsum consumption were slowed down by SE adjunction. Admixture YD induced an acceleration of ettringite formation as well as gypsum consumption whereas portiandite formation was blocked by this compound.

Mots-clés : polysaccharides Cement hydration organic admixtures polysaccharides.

Author: Arnaud Peschard - Alexandre Govin - Emmanuel Fredon - Philippe Grosseau - Gilles Fantozzi -



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