Estimation of Adiabatic Temperature Rise of HVFA Concrete by Simplified Method

Abstract

There is a large demand in consumption of fly ash due to current increase of coal power plants. Fly ash in concrete as admixture contributes to decrease heat of hydration. The larger amount of fly ash is in concrete, the lower heat of hydration is generated in the early age. This is caused by substitution of fly ash for cement, which implies that less cement is mixed in the concrete. Present paper describes adiabatic temperatures of the high volume fly ash concrete. The estimated adiabatic temperature in the concrete standard specification evaluates a little higher for amounts less than 200kg/m³ of cement in concrete, and an equation of adiabatic temperature for these amounts of cement is herein proposed.