Effects of elevated temperatures on the thermal behavior and mechanical performance of fly ash geopolymer paste, mortar and lightweight concrete

This paper reports a comparative study of the influence of elevated temperature on geopolymer paste, mortars and lightweight aggregate geopolymer concrete (LWAGC) systems made by using fly ash (FA) as only source material. The mechanical, thermo-physical and macro/micro-structural properties of the geopolymers before and after the exposure to elevated temperatures of 400, 600 and 800 °C have been investigated. The sequential changes in the...