不同粉煤灰掺量混凝土抗冻融性能研究

通过液压伺服试验系统，研究不同粉煤灰掺量下混凝土的抗冻融性能。对不同粉煤灰掺量的混凝土试块分别进行冻融循环试验，并在不同循环次数下对试块进行单轴压缩强度测试及质量变化进行测定，并研究了混凝土的冻融损伤演化方程和冻融损伤本构关系。研究表明：在混凝土中掺入一定的粉煤灰能够改善其抗冻、抗裂性能，且掺有粉煤灰的混凝土的后期强度大于普通混凝土后期强度，实验所得结论为低温环境下混凝土在实际工程中的应用提供了一定的参考价值。

Study on the Anti-frost Property of Concrete with Different Dosage Fly Ash

Hydraulic servo testing system was adopted to study the anti-frost property of concrete with different dosage of fly ash. Freezing-thawing cycles were conducted on the concrete with different dosage of fly ash, after which uniaxial compressive tests were performed and mass of the concrete was measured. The freeze-thaw damage evolution equation and damage mechanism of concrete were analyzed. Results show that the anti-frost property and anti-cracking ability of concrete can be improved when a certain amount of fly ash was added. In addition, the late strength of concrete with fly ash is stronger than the ordinary concrete, which provides a certain reference value for the concrete application in low temperature in the actual project.