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应用比强度概念分析了碾压高掺量粉煤灰混凝土（ Ｈ Ｆ Ｒ Ｃ Ｃ） 的结构形成和强度发展过程中粉煤灰效应的贡献及机理．试验和分析结果表明： Ｈ Ｆ Ｒ Ｃ Ｃ 的早期强度随粉煤灰掺量的提高而下降；随龄期的增长， Ｈ Ｆ Ｒ Ｃ Ｃ 的强度发展加速，不同粉煤灰掺量的 Ｈ Ｆ Ｒ Ｃ Ｃ 中的粉煤灰效应对强度的贡献也从早期的负效应逐渐转变为正效应；粉煤灰效应对 Ｈ Ｆ Ｒ Ｃ Ｃ 抗折强度的贡献大于抗压强度．
The concept of specific strength was used to analyze the contribution and mechanism of fly ash effect in the process of structure formation and strength development of roller compacted high volume fly ash concrete (H F R C C). The test and analysis results show that the early strength of H F R C C decreases with the increase of fly ash content; with the increase of age, the strength of H F R C C is accelerated, H F with different fly ash content The contribution of fly ash effect in R C C to the strength also gradually changed from the early negative effect to the positive effect; the fly ash effect contributed more to the flexural strength of H F R C C than the compressive strength.