Effects of aluminate rich slag on compressive strength, drying shrinkage and microstructure of blast furnace slag cement

The results showed that a quaternary binder of OPC-GGBFS-ARS-Gypsum has a beneficial effect on the compressive strength and drying shrinkage. The ettringite formed in the OPC-GGBFS-Gypsum binder were like sharp needles while the ettringite formed in the OPC-GGBFS-ARS-Gypsum binder were like thick needles. Because of such ettringite formation differences, the compressive strength and drying shrinkage of the quaternary binder was better than that of the ternary binder.