Effect of the mix composition on rheological behavior of a fresh granular-cement paste material

Abstract

In this paper, the effect of the mix composition on rheological behavior of a mixture is studied by considering a two-phase model for a mixture. A mixture is decomposed into a granular and a paste phase. Paste itself is divided into the void paste and the excess paste. The slump test is used for evaluation of rheological behavior of a mixture. The results show that the granular-cement paste mixtures can be split into three main classes viz Granular-High Paste, Granular-Intermediate Paste and Granular-Low Paste. In Granular-High Paste class, the behavior is governed by the excess paste and the capacity of deformation of mixtures is maximal. In Granular-Low Paste class, the behavior is governed by the void paste and the capacity of deformation of mixtures is minimal. In Granular-Intermediate Paste class the behavior is determined by both the excess paste and the void paste, and the deformability is in between that of the two other extreme cases.Structural EngineeringCivil Engineering and Geoscience