2019 Volume 73 Issue 1 Pages 459-464
Three-component concrete, in which silica fume is mixed with blast furnace slag cement, has been reported that chloride penetration resistance is greatly improved. Its spread is desired. In this study, silica fume slurry is post-added to a track agitator and the concrete was mixed. The fundamental properties of this concrete were examined. As a result, even if the slurry was added, the decreases in the slump and the air content of the concrete were small. Furthermore, there was no decline in the compressive strength and the coefficient of variation was also small. The bubble spacing factor also shows a sufficiently small value, which suggests that it is possible to add a silica fume slurry with a track agitator to produce a three-component concrete. Furthermore, it is suggested that it is possible to adjust properties of fresh concrete by post-addition of super plasticizers and AE agent.
