An investigation on alkali-activated fly ash pastes modified with quartz powder subjected to elevated temperatures

In this study, the opportunity of employing quartz powder (QP) to improve the workability as well as the compressive strength of alkali-activated fly ash (AAFA) pastes before and after exposure to thermal loads has been investigated. Fly ash (FA) was partially substituted with QP at percentages ranging from 0% to 30% with an interval of 5%, by weight. After curing, specimens were exposed to different thermal loads ranging from 400 °C to 1000 °C...