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陶粒混凝土广泛应用于桥隧工程中,其抗冻性能尤为重要。文章通过慢冻法对比试验,发现陶粒混凝土的质量损失率和强度损失率均低于普通水泥混凝土,得出陶粒混凝土的抗冻性能优于普通水泥混凝土的结论。通过扫描电子显微镜微观分析试验(SEM),对陶粒改善水泥混凝土抗冻性能的机理进行分析。结果表明:陶粒混凝土一方面具有许多微观孔,从而为冰冻水压力提供了缓冲空间,另一方面,陶粒改善了水泥石与集料的界面粘结力,从而阻断了水的冻胀作用,进而提高其抗冻性能。
Ceramsite concrete is widely used in bridge tunnel project, its frost resistance is particularly important. Through the slow-freezing method, the article finds that the mass loss rate and the strength loss rate of ceramsite concrete are lower than ordinary cement concrete, and the conclusion is obtained that frost resistance of ceramsite concrete is better than ordinary cement concrete. Through scanning electron microscopy (SEM) microscopy analysis of the mechanism of ceramic frost to improve the frost resistance of concrete. The results show that on the one hand, ceramsite concrete has many microscopic pores, which provide buffer space for the freezing water pressure. On the other hand, ceramsite improves the interfacial adhesion between cement stone and aggregate, thus blocking the frost heaving Role, thereby enhancing its frost resistance.