摘要
采用快冻法研究了不同水胶比混凝土在不同品种、浓度(3%、5%、20%)氯盐融雪剂溶液中的抗冻性,并探讨了混凝土外观形貌、质量损失率、相对动弹模量的变化。研究结果表明:C50混凝土抗盐冻性比C30好,能多经受50次的冻融循环;在不同氯盐溶液浓度下混凝土的盐冻破坏程度为5%>3%>20%,且同浓度下A氯盐融雪剂对混凝土冻融破坏程度比B融雪剂大;掺适量硅灰和高性能引气剂能显著改善混凝土的抗盐冻性能。
The freeze-thaw durability of different water-binder ratio concrete subjected to 3%、5%、20% solution of different types of chloride snow-thawing agent were studied by an accelerated freeze-thaw method.The varation of surface characteristic,weight loss rate,relative dynamic modulus of elasticity of concrete were investigated.Results show that C50 can suffer another 50 freeze-thaw cycles than C30,which has a superior frost-salt resistance to C30.The damage of concrete is largest when solution concentration is 5%,and smallest when it is 20%.Compared with A,B chloride salt has a less destructiveness to concrete.Concrete entertained with appropriate amount of silica fume or high-performance air-entraining agent has better salt-freezing-resistance ability.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第6期1244-1248,共5页
Bulletin of the Chinese Ceramic Society
基金
"863"国家高技术研究发展计划(2009AA03Z508)
国家自然科学基金(No.60672166)
西部交通项目(2009CB01)
关键词
混凝土
氯盐融雪剂
抗冻性
硅灰
引气剂
concrete
chloride snow-thawing agent
freeze-thaw durability
silica fume
air-entraining agent
