基于“CAD法”的气孔结构对道面混凝土盐冻耐久性影响研究

Research on the influence of pore structure on impact salt durability of pavement concrete base on“CAD”

利用"CAD法"对不同组混凝土试件的切片进行分析。通过研究发现,混凝土试件的孔结构是影响混凝土盐冻耐久性的重要因素。平均气孔孔径更适用寻找最佳含气量,气孔分布情况可以表征引气效果的好坏,孔间系数能直接反应混凝土的盐冻耐久性,随着孔间系数的增大,混凝土的盐冻剥蚀量也逐步增加,其抗盐冻耐久性能降低。

It analyzes all the different groups of samples of concrete by “CAD”.It draws a conclusion that pore structure is the important factor which influences freeze-deicing salt durability of concrete,the average stomatal aperture can be used to find out the best air content and air void spacing factor can directly present deicer-frost resistance durability of concrete.With increasing air void spacing factor,scaled mass is also increased,the resistance to salt and cold endurance decreased.