The analysis on strength and fly ash effect of roller-compacted concrete with high volume fly ash

In this paper, the strength of roller-compacted concrete with high volume fly ash (HFRCC) is examined. By using the notion of specific strength, the qualified contribution of fly ash effect to construction formation and strength development of HFRCC is also analyzed. The research results show that: (1) The strength at early ages of HFRCC is poor, while the fly ash effect is low or negative. (2) The strength of HFRCC increases rapidly following its curing age; meanwhile, the fly ash effect gradually improves and is more beneficial to raising flexural strength. (3) With increasing proportion of fly ash, its effect on HFRCC at long curing age becomes more remarkable.