Fundamental Study on Production Method of Concrete by Post-Addition of Silica Fume Slurry to Concrete in Truck Agitator

Abstract

Three-component concrete made using blast furnace slag cement with admixture of silica fume has been reported to greatly improve chloride penetration resistance, and its broader use is desired. In this study, silica fume slurry is post-added to concrete in a truck agitator, the concrete is further agitated, and the fundamental properties of the resulting concrete are examined. As a result, it is found that the chloride diffusion coefficient of the concrete is lowered by post-addition of silica fume slurry. This suggests that it is possible to produce three-component concrete with post-addition of silica fume slurry in a truck agitator.