Investigation of the freeze-thaw resistance of eco-porous concrete containing fly ash

Abstract

Laboratory tests were conducted to evaluate the freeze-thaw resistance of eco-porous concrete containing fly ash. In order to address the freeze-thaw resistance of eco-porous concrete, the mass loss, compressive strength and relative dynamic modulus of elasticity (RDME) were obtained. Furthermore, based on the RDME, the freeze-thaw damage index (FTI) was provided to evaluate the internal damage. The results showed that the higher the amount of fly ash, the poorer is the frost resistance of porous concrete. The mass, compressive strength and RDME of specimens decreased with the increasing freeze-thaw cycles. The compressive strength decreased with an increase in fly ash, but the initial compressive strength is sufficient for requirements. Therefore, the content of fly ash should be controlled when producing eco-porous concrete and predicting its performance under freeze-thaw attacks with the explored method.