Influence of different types and contents of gypsum on mechanical properties and porosity of sulphate activated binder

Abstract Fly ash (FA) is pozzolanic, while blast furnace slag (GGBS) latent hydraulic. These two materials react slowly in the presence of water to harden. Adding an alkali activator such as strong hydroxide could boost hardening process, but safe handling highly corrosive primary concern. Therefore, present work prescribed various types gypsum activate FA and GGBS a binder phase for making mortar. It aimed investigate influence different contents on mechanical properties porosity sulphate-activated binder. Gypsum less material provide calcium sulphate ions activating FA. The main component was sulphate. provides sources that promote more C-S-H be formed. A few were studied with their effect FA/GGBS blended Furthermore, strength gypsum-activated GGBS/FA mortar assessed. containing white exhibited best performance among all gypsum. On other hand, red dental established effective pore refinements, lowering mortar’s total porosity. In conclusion, most suitable blend examined.