硫酸溶液中混凝土的腐蚀速率研究

发布时间：2018-04-06 06:36

本文选题：混凝土　切入点：硫酸溶液　出处：《混凝土》2017年11期

【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。
[Abstract]:Using sulfuric acid solution as acid corrosion medium, the acid corrosion resistance tests with the change of corrosion time, such as appearance, compressive strength, quality and depth of strength degradation, were carried out under the condition of acid solution corrosion with PH value of 0.5 ~ 1.0 ~ (-1) ~ (-1), respectively.The results show that the higher the concentration of H _ 2SO _ 4 solution, the more obvious the apparent failure of concrete specimen is.) with the increase of corrosion time, the initial compressive strength of the concrete specimen does not change obviously, and then decreases gradually, and the mass of the specimen increases slowly at first.With the increase of corrosion time, the strength degradation depth increases gradually, and the degradation depth period is about 60 ~ 120 days.
【作者单位】：国家核电山东电力工程咨询院有限公司;山东正元建设工程有限责任公司;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;
【基金】：国家自然科学基金项目(51178455) 国家“863”计划课题(2012AA06A402)
【分类号】：TU528

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