Abstract
Considering their good performance and environmental friendliness, fly ash based construction materials have great potential as an alternative to ordinary Portland cement. This study investigates the effect of using reactive mineral admixtures such as fly ash as cement replacement on delayed ettringite formation through high volume fly ash mortar cast in the laboratory and exposed to a high curing temperature over a 28-days study period. The delayed ettringite formation (DEF) is seen as a form of internal sulfate attack of cementitious materials, it is a chemical reaction that can cause damage to concrete heated to a temperature above about 70 °C. To achieve the aim of this study, a portion of cement was replaced by class F fly ash with 50% by mass of binder under both standard curing conditions and heat treatment curing conditions. Experiments involved the mechanical strengths and as well as microstructural characteristics.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
