Abstract
This study aims to evaluate an effect of the γ-C2S and Quartz substitution ratio to OPC, on the sulfuric acid resistance in autoclaved cementitious materials, such as paste, mortar and concrete. Furthermore, to evaluate the application of a laboratory test, comparing an actual environment testing to an accelerating test in a laboratory has been carried out. As a result, in case of quartz substitution ratio 50% and γ-C2S substitution ratio 40% with autoclaved curing, the high sulfuric acid resistance obtained. Because the sulfate ion penetration was inhibited due to silica gel and C-S-H gel produced by resolutions of tobermorite or residual γ-C2S at the surface part. Also, accelerating test in a laboratory is useful comparing an actual environment testing. Because the accelerating test in a laboratory and the actual environment testing show the same tendency.
