低危害除冰盐对水泥混凝土盐冻破坏的影响及其机理  

Effects of a Low-Harm Deicing Salt on the Salt-Frost Scaling of Concrete and Its Mechanism

作　　者：吴鹏程 杨全兵[1] 徐俊辉 韩俊甜 WU Pengcheng;YANG Quanbing;XU Junhui;HAN Juntian(Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 201804,China;China Salt Jintan Co.,Ltd.,Changzhou 213200,China)

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804 [2]中盐金坛盐化有限责任公司,江苏常州213200

出　　处：《建筑材料学报》2020年第2期317-321,327,共6页Journal of Building Materials

摘　　要：研究了低危害除冰盐对水泥混凝土表面剥蚀破坏、盐溶液结冰压、混凝土饱水度和混凝土-冰黏结抗折强度的影响.结果表明:掺入添加剂的低危害除冰盐能够明显降低混凝土的盐冻剥蚀破坏;与质量分数为4.00%的NaCl溶液相比,添加剂对盐溶液的结冰压无明显影响,但可以明显降低混凝土-冰的黏结抗折强度和较为明显地降低混凝土的饱水度;基于这些实测数据可以较好地解释低危害除冰盐对混凝土盐冻剥蚀破坏的改善机理.The effects of low-harm deicing salt on the salt-frost scaling of concrete surface, the ice-formation pressure of salt solution, the degree of saturation in concrete and the bond strength between concrete and ice were investigated. The results show that the salt scaling of concrete is significantly reduced by the low-harm deicing salt with the additive. Comparing with the 4.00% NaCl solution, the additive has no significant effect on the ice-formation pressure of the salt solution, but significantly reduce the bond strength between the concrete and ice, and the degree of saturation in the concrete decreases. The improving mechanism of the low-harm deicing salt on the salt-frost scaling of concrete is well explained based on these measured data.

关 键 词：低危害除冰盐 盐冻剥蚀破坏 结冰压 饱水度 黏结抗折强度 

分 类 号：TU528.57[建筑科学—建筑技术科学]