J. Phys. IV France 123 (2005) 189-192
Effect of an organic additive on the rheology of an aluminous cement paste and consequences on the densification of the hardened materialY. El Hafiane1, A. Smith1, J.P. Bonnet1 and B. Tanouti2
1 GEMH (EA 3178), École Nationale Supérieure de Céramique Industrielle, 47 à 73 avenue Albert Thomas, 87065 Limoges Cedex, France
2 LCSM, Faculté des Sciences Semlalia, avenue Moulay Abdellah, 40000 Marrakech, Maroc
The material used in the present work is Secar 71 (Lafarge) mixed with water containing an organic additive (acetic acid noted HOAc). The rheological behavior of these pastes is studied. The best dispersion is obtained when the mass content of the additive with respect to the cement is equal to 0.5%. The microstructural characterizations of samples aged 4 days at 20C and 95 % relative humidity reveal a significant increase in the density and a reduction in porosity for very small percentages of additive. The remarkable effect of the acetic acid on the microstructure of hardened material is correlated with its good dispersing action.
Key words: Aluminous cement, Rheological behavior, Dispersion, Organic additive, Microstructural properties.
© EDP Sciences 2005