Interfacial transition zone between geopolymer paste and several fine aggregates

Abstract

It is now known that the adhesion between geopolymer paste and the surface of aggregates, whether the adhesion between the paste and the fine or coarse aggregate is important and affects the compressive strength of geopolymer mortar or geopolymer concrete. In this test, the adhesion ability of geopolymer paste with total adhesion characteristics between geopolymer paste and different types of fine aggregates fragments, including river sand, recycled concrete, crushed limestone and crushed container glass by investigated the joints between geopolymer paste and fine aggregates surfaces using Scanning Electron Micro Scope. From the investigation, it was found that geopolymer mortar with river sand as the mixture, providing the highest compressive strength. Because the adhesion between the fine aggregate and geopolymer paste is dense, which is consistent with the results of scanning electron microscopy.