盐渍土地区冻融环境下渗透型防水剂对混凝土的防护性能研究

Study on Concrete Protective Performance of Permeable Waterproofing Agent in Saline Soil Area under Freeze-thaw Environment

制备若干组渗透型防水剂,对其在混凝土抗氯离子吸收、干燥系数和吸水率比进行了验证。结果表明:渗透型防水剂对混凝土抗氯盐侵蚀和抗冻融破坏效果显著;渗透组的抗氯离子吸收降低率高达97.6%,抗氯盐侵蚀优异;渗透组干燥系数达51.9%,有利于更多水分子从混凝土内部挥发出来;渗透型防水剂处理的混凝土吸水率比平均值为5.64%,防水效果显著,在盐渍土区域的户外试验段对混凝土防水性能的提升明显。

Several groups of permeable waterproofing agents were prepared in this paper,the resistance to chloride ion absorption,drying factor and water absorption ratio of concrete are verified.The results show that permeable waterproofing agent has significant effect on chloride corrosion resistance and freeze-thaw resistance of concrete;The anti-chloride ion absorption reduction rate of the penetration group is as high as 97.6%,and the chloride corrosion resistance is excellent;The dryness coefficient of the penetration group is 51.9%,which is conducive to the volatilization of more water from the concrete;The water absorption of concrete treated with permeable waterproofing agent is only 5.64%,and the waterproof effect is remarkable,which can improve the waterproof performance of concrete in the outdoor test section of saline soil area.