曹诚　孙伟　秦鸿根

摘　要：通过对高掺量粉煤灰碾压混凝土的力学性能的测试和对其中粉煤灰掺量的影响及提高水泥标号对粉煤灰激发效果的机理分析，得出以下结论：高掺量粉煤灰碾压混凝土的早期强度随粉煤灰掺量的提高呈下降趋势，但随龄期增长增幅增大；提高粉煤灰掺量有利于降低碾压混凝土的脆性；提高水泥标号对高掺量粉煤灰碾压混凝土的早期强度有利，但降低了抗折强度的后期增幅。

关键词：粉煤灰；高掺量；碾压混凝土；强度


An study of mechanical properties of roller compacted concrete
with high volume fly ash

CAO Cheng
（Tianjin Municipal and Highway Research Institute, Tianjin 300074，China）
SUN Wei　QIN Hong-gen
（Southeast University, China）

Abstract：By testing the mechanical properties of RCC, and analyzing the influence of fly ash volume and the mechanism of cement activating-effect on fly ash, following conclusions are given in the paper. Early age strength of RCC with high volume fly ash decreases with the increment of fly ash volume, but it increases by a big margin with the curing age. Increasing the fly ash volume in RCC is beneficial to decreasing its brittleness. Raising the cement index does good to the early age strength of RCC with high volume fly ash, but it is unfavourable to later period increasing-extent of flexural strength.
Key words：fly ash; high volume; roller compacted concrete; strength