Abstract
The relationship between a) the adsorption characteristics of the dispersing components in polycarboxylate-based AE high-range water-reducing agents onto various type of fine particles and b) the fluidity of a paste of the fine particles, was studied. The results of the study indicated that as the relative surface area of the same type of fine particle increases, the adsorption amount of the dispersant per unite weight of fine particle increases, but the adsorption amount per unite surface area of the particle remains constant. This result suggests that it is possible to estimate the amount of dispersant required for dispersing particles whose relative surface area are different, such as blast furnace slag and limestone fine particle. It is also believed that the lower surface tension of the paste water after adsorption saturation reduces the viscosity of the fine particle paste, thereby increasing the paste's fluidity.
