盐渍土环境下混凝土的抗腐蚀性能研究  

Corrosion resistance of concrete in saline soil environment

作　　者：郝贠洪[1] 江南[1] 樊金承 刘永利[1] 曹海龙 

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古自治区城镇建设水文中心,内蒙古呼和浩特010010

出　　处：《混凝土》2016年第8期8-10,15,共4页Concrete

基　　金：国家自然科学基金资助项目(51468049)

摘　　要：内蒙古中西部地区是内蒙古盐渍化最严重的地区,为了研究长期处于该盐渍土腐蚀环境下混凝土的抗腐蚀性能,通过在内蒙古中西部3个代表性区域实地取样,对盐渍土基本特征进行分析。根据达拉特旗盐渍土中主要易溶盐的含量,配制了3种不同浓度的复合盐侵蚀溶液,再以单盐盐侵蚀溶液和水溶液用于试验对比,对混凝土进行长期浸泡试验。结果表明:长期浸泡后,混凝土在复合盐和单盐溶液中的质量和强度变化规律均呈现先上升后下降,且复合盐浓度越大,其损伤越严重,复合盐溶液中混凝土抗侵蚀能力强于其在硫酸钠溶液中的抗侵蚀能力,研究结果将为在该腐蚀环境下混凝土结构和材料防护及耐久性评价提供依据。The western and central Inner Mongolia is the most severe saline soil area, in order to study the corrosion resistance property of concrete under the condition of a long-term corrosion environment.The soil samples for analysis were obtained from three typical saline soil areas in the western and central Inner Mongolia.Three different concentrations of mixed salt and the single salt and water were com- pared in the experiment of concrete under the condition of long-time soaking.Test results show that mass and the compressive strength of concrete increases to some extent at the early stage of test, and then with the increasing times of soaking, mass and compressive strength loss begin to speed up, and the higher concentration of the mixed salt, the more serious damage of the concrete occurred.The erosion resis- tance of the concrete in mixed salt solution is stronger than in sodium sulfate solution.The results will provide basis for protection and durability evaluation of concrete under the corrosive environment.

关 键 词：盐渍土 混凝土 浸泡 盐侵蚀 

分 类 号：TU528.33[建筑科学—建筑技术科学]