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混凝土中的气孔结构对抗冻性有重要影响。通过系统地试验,分析了道面混凝土中含气量与气泡间距系数、抗冻性之间的关系。结果表明,对于干硬性的道面混凝土:当含气量大于3%,气泡间距系数小于450μm时,可达到300次抗冻要求;当含气量在4%左右,气泡间距系数小于350μm时,可达到500次抗冻要求。
The stomatal structure in concrete has an important influence on frost resistance. Through systematically testing, the relationship between air content and bubble spacing coefficient and frost resistance in pavement concrete was analyzed. The results show that for hard concrete pavement concrete, when the gas content is more than 3% and the bubble spacing coefficient is less than 450μm, it can reach 300 times freezing resistance requirements. When the gas content is about 4% and the bubble spacing coefficient is less than 350μm, 500 antifreeze requirements.