Mechanical properties of small aggregate porous geopolymer concrete

Abstract

This paper presents the research on the influence of the aluminum powder to the volumetric mass, porosity, compressive strength and elastic modulus of small aggregate porous geopolymer concrete (SAPGC). The article also presents research on the effects of molar concentration of NaOH solution and the ratio of alkaline/fly-ash on the mechanical properties of SAPGC. Experimental results show that aluminum powder increases porosity, reduces volumetric mass and correspondingly reduces compressive strength and elastic modulus of SAPGC. Experimental research also leads to the proposal of a improved formula to calculate the elastic modulus of SAPGC from the compressive strength of the material.

Keyword: Small aggregate porous geopolymer concrete (SAPGC); compressive strength; elastic modulus.