曹誠　孫偉　秦鴻根

摘　要：通過對高摻量粉煤灰碾壓混凝土的力學性能的測試和對其中粉煤灰摻量的影響及提高水泥標號對粉煤灰激發效果的機理分析，得出以下結論：高摻量粉煤灰碾壓混凝土的早期強度隨粉煤灰摻量的提高呈下降趨勢，但隨齡期增長增幅增大；提高粉煤灰摻量有利于降低碾壓混凝土的脆性；提高水泥標號對高摻量粉煤灰碾壓混凝土的早期強度有利，但降低了抗折強度的后期增幅。

關鍵詞：粉煤灰；高摻量；碾壓混凝土；強度


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