摘要
本文对砼进行了孔结构与抗冻性关系和气泡特性与抗冻性关系的试验研究。试验结果表明,采用压汞法测试砼的孔径分布,与砼的抗冻性无明显的相关性,并分析了造成该结果的原因。试验结果还表明,气泡间距系数、新拌砼含气量、硬化砼含气量以及平均每厘米切割气泡个数与砼抗冻性有较好的相关性。
An experiment on the relations between the pore structure of concrete and the frost resistance of concrete, and the relations between the characteristics of air bubbles in concrete and the frost resistance of concrete has been carried out and the result shows that, when being tested with injected mercury, there is no evident correlation between the pore size distribution in concrete and the frost resistance of concrete. Analysis of the phenomenon is presented. The experiment result indicates that, the spacing factor of air bubbles, air content in fresh concrete and hardened concrete, and the average number of air bubbles that were cut per centimeter have a good correlation with the frost resistance of cncrete.
