冻融环境下引气粉煤灰混凝土性能研究

Study on air-entraining fly-ash concrete in freeze-thaw environment

进行了快速冻融作用下的混凝土室内模拟试验,研究了冻融循环作用下混凝土的质量变化和动弹性模量变化规律。试验结果表明:水胶比、粉煤灰掺量及引气剂掺量均是影响混凝土抗冻性的重要因素。通过分析试验数据,进而建立了考虑水胶比、粉煤灰掺量及引气剂掺量的冻融循环后混凝土质量变化模型和动弹模量变化模型,与试验结果拟合精度较高。这些结论为冻融环境下混凝土耐久性研究提供了参考和依据。

The experimental study of fly-ash air-entraining concrete specimens suffering freeze-thaw cycle were carried out.The weight and the dynamic elastic modulus were measured.The testing results were discussed and considering the water-cement ratio, fly ash contents and the air-an- training agents, the prediction model of weight and the dynamic elastic modulus of concrete is built,which the function relation has good correla- tion.The conclusions can provide the reference for the study of the concrete durability in freeze-thaw environment.