硫酸溶液中混凝土的腐蚀速率研究  

Research on the corrosion rate of concrete under sulfuric acid solution

作　　者：阴琪翔[1] 侯明姣 杜健民[3] 刘建秋[1] 商文念[1] 甘露[1] 

机构地区：[1]国家核电山东电力工程咨询院有限公司,山东济南250013 [2]山东正元建设工程有限责任公司,山东济南250013 [3]中国矿业大学力学与建筑工程学院江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116

出　　处：《混凝土》2017年第11期74-76,86,共4页Concrete

基　　金：国家自然科学基金项目(51178455);国家"863"计划课题(2012AA06A402)

摘　　要：以硫酸溶液作为酸性腐蚀介质,开展PH值分别为0.5、1.0、1.5的酸性溶液腐蚀条件下,试样外观、抗压强度、质量、强度退化深度等随腐蚀时间变化的耐酸腐蚀试验。试验结果表明:(1)硫酸溶液浓度越大,混凝土试块表观破坏越明显;(2)随腐蚀时间的增加,试样抗压强度初期变化并不明显,随后逐渐减小;试样质量呈先缓慢增大,后逐渐减小的变化趋势,低浓度硫酸腐蚀作用对试样质量影响并不明显;(3)随腐蚀时间的增加,试样强度退化深度逐渐增加,退化深度剧变时间段约为60~120 d。In sulfuric acid solution as the acid corrosion medium,p H value of acid solution were carried out in 0.5,1.0,1.5 corrosion conditions under acid corrosion test specimens,compressive strength,appearance quality,strength degradation depth changes with the etching time.The test results showed that the concentration of sulfuric acid solution,the apparent failure of concrete is more obvious.With the increase of etching time,the compressive strength of the samples at the beginning of the change is not obvious,then gradually decreased.The quality of the sample was slowly increased.The trend of decreasing,effect of low concentration of sulfuric acid corrosion of the sample quality is not obvious with the increase of etching time.The tensile strength degradation depth increases gradually,the degradation time is about 60 d depth changes to 120 d.

关 键 词：混凝土 硫酸溶液 抗压强度 强度退化深度 

分 类 号：TU528.01[建筑科学—建筑技术科学]