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当今混凝土受冻融循环的损害,导致混凝土的各项性能下降。本文根据已有的研究对混凝土的抗冻性能进行分析,发现在混凝土的配比中加入粉煤灰,矿粉对混凝土的抗冻性能有影响,因此本文研究掺合料对混凝土的抗冻影响。试验中对这些预制好的混凝土进行快速的冻融循环后做力学性能和表面孔隙试验。发现掺合料对混凝土的抗冻性能有积极的作用,其中粉煤灰掺合料在35%时对提高混凝土的抗冻性能最好。
Concrete is affected by the freeze-thaw cycle today, leading to a decline in various properties of concrete. According to the existing research, this paper analyzes the frost resistance of concrete, and finds that the addition of fly ash in the proportioning of concrete affects the frost resistance of the concrete. Therefore, this paper studies the antifreeze effect of admixture on concrete . The test of these prefabricated concrete after rapid freeze-thaw cycles do mechanical properties and surface porosity test. It is found that the admixture has a positive effect on the frost resistance of the concrete, of which the fly ash admixture is the best for improving the frost resistance of the concrete at 35%.