硫酸溶液中水灰比对混凝土腐蚀速率影响研究  

Research of water to ash ratio 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] 丛培瑞[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》2018年第1期61-63,71,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,开展水灰比分别为0.4、0.5、0.6的试样在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:腐蚀初期,硫酸溶液对水灰比较小试样外观影响较大,后期均产生明显裂纹,表面剥落;随腐蚀时间的增加,试样抗压强度初期缓慢增加,随后逐渐减小,水灰比较大试样在腐蚀初期抗压强度增加明显;试样质量呈先增大,后逐渐减小的变化趋势,水灰比较大试样在整个腐蚀期质量变化率均为最大;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均约为120 d前后。In sulfuric acid solution as the acid corrosion medium, carry out the water cement ratio were 0.4,0.5 and 0.6 samples in acid solution under the condition of corrosion, acid corrosion test specimens, compressive strength, appearance quality, strength degradation depth changes with the etching time.The test results indicate the erosion of sulfate solution has great influence on the water cement ratio is relatively small sample appearance,obvious cracks were later surface spalling.With the increase of etching time,the early compressive strength of the samples increased slowly and then decreased gradually.The water cement larger samples increased significantly at the early stage of corrosion, compressive strength.The quality of the sample was first increase the trend of decreasing, water cement larger changes in the quality of the entire sample period of corrosion rate was the largest.With the increase of corrosion time,the compressive strength degradation depth increased and degradation time were about the depth of upheaval before and after 120 d.

关 键 词：混凝土 水灰比 硫酸溶液 抗压强度 强度退化深度 

分 类 号：TU528.062[建筑科学—建筑技术科学]