盐浸条件下引气混凝土的盐类腐蚀破坏研究  

Study on Salt Corrosion Damage of Air-entraining Concrete under the Condition of Salt Soaking

作　　者：张利[1] Wenzhong Zhu 宿晓萍[1] 陈达[1] 

机构地区：[1]长春工程学院土木工程学院,吉林长春130012 [2]西苏格兰大学工程学院

出　　处：《建筑科学》2015年第5期36-43,共8页Building Science

基　　金：国家自然科学基金项目(406721780);国家住房与城乡建设部项目(2014-H-002);吉林省科技厅项目(20130413055GH)

摘　　要：长期处于盐水环境或埋于盐渍土中的混凝土工程经常受到土或水中易溶盐的腐蚀。本文采取盐浸的方式对长期处于此类环境下的混凝土性能损伤变化规律进行了试验研究,通过对盐类腐蚀破坏后的混凝土进行电镜扫描、EDX能谱分析与化学成分测定,对复合盐侵蚀作用下混凝土腐蚀破坏的机理进行了深入研究。试验结果表明:各类有害盐是引起混凝土性能劣化的重要因素,混凝土的盐类腐蚀破坏是化学侵蚀与物理结晶两方面作用所致,且引气混凝土的抗盐腐蚀破坏的能力比普通混凝土要好。The concrete works,which are situated in the environment of salty water or buried in the saline soil in long term,are often destroyed by the soluble salts corrosion. In this article,the experiments are carried out to study the changing rule of concrete damage under such environment for long term by taking the way of multi-salt soaking.Through the electron microscope scanning,EDX spectrum analysis and determination of chemical composition on concrete damaged by the salt corrosion,the damage mechanism of concrete under the action of the multi-salt corrosion is studied furthermore. The results show that all kinds of harmful salts are the main factors causing performance of concrete degradation. Salts erosion on concrete includes both chemical attack and physical crystallization damage. The ability resisting salts corrosion of air-entraining concrete is better than that of ordinary concrete.

关 键 词：引气混凝土 碳酸氢盐 硫酸盐 氯盐 浸泡作用 盐类腐蚀 

分 类 号：TU528.33[建筑科学—建筑技术科学]