粉煤灰对高流态混凝土抗裂性能的影响

Influence of fly ash on early - age crack of high - flowing concrete

在新拌混凝土工作性能、硬化后抗压强度相当的条件下,通过平板法试验研究粉煤灰掺量及其品种高 流态混凝土抗裂性能的影响,并确定不同品种粉煤灰最佳掺量,为配制抗裂性能较好的高流态混凝土提供参考．

The study focuses on the effect of variety and content of fly ash on early - age crack of high -flowing concrete (HFC) , which was based on the HFC with equivalent workability of fresh concrete and equivalent strength. The modified flat - type specimen was used to study early - age crack of HFC. The test results show that the optimal content of different variety of fly ash with which the early - age crack resistance performance of HFC was higher than with others content was different. The test results provide useful references for confecting the mixture of HFC with high cracking resistance property.