Charge and surface energy interface among particles in cement and pozzolan suspensions

Abstract

This study was conducted to determine the interaction mechanisms among particles during the hydration of composite cements prepared with crystal and amorphous pozzolans. Chemical, physical, mineralogical and electro-kinetic analyses of samples were conducted. Furthermore, free surface energy components defined with Van Oss, Chaudhury and Good equations and contact angle values of samples were determined by using the thin layer wicking method. The results demonstrate that particle charges, hydrophilic/ hydrophobic properties of surfaces and surface energies could be effective in interactions of ordinary Portland cement and pozzolan suspensions.