暴露和浸泡混凝土氯离子结合能力相关性研究

发布时间：2018-02-26 22:35

本文关键词： 浸泡暴露混凝土氯离子结合能力相关性　出处：《硅酸盐通报》2017年06期 　论文类型：期刊论文

【摘要】：在盐湖现场暴露和长期浸泡环境下进行了混凝土腐蚀试验,分别测定了不同试验环境下混凝土构件在不同深度的总氯离子含量(Ct)和自由氯离子含量(Cf),运用了回归法分析盐湖卤水浸泡和盐湖现场暴露环境下混凝土氯离子结合能力的相关性系数KR与其扩散深度、混凝土抗压强度的相关性。分析结果表明:氯离子结合能力相关性系数KR随着混凝土抗压强度的增加而降低;对于混凝土抗压强度小于58.6 MPa时,其KR值均大于1.2且随着氯离子扩散深度的增加而增大,当混凝土抗压强度为80.6 MPa时,其KR值仅为0.8且随着氯离子扩散深度的增加而降低。因此,为了更准确的预测盐湖现场环境下的实体结构的寿命,需要利用RE=2.687e-0.0142fc+(0.0111-0.0002fc)xRI将室内环境下的氯离子结合能力换算成现场环境下的氯离子结合能力。
[Abstract]:The corrosion test of concrete was carried out under the condition of field exposure and long-term immersion in salt lake. The total chloride ion content (tt) and free chloride ion content (CfN) of concrete members at different depths were measured in different test environments. The regression method was used to analyze chloride concentration in concrete under salt lake brine immersion and in situ exposure to salt lake. Correlation coefficient KR and diffusion depth, Correlation of compressive strength of concrete. The results show that the correlation coefficient KR of chloride binding capacity decreases with the increase of compressive strength of concrete, and when the compressive strength of concrete is less than 58.6 MPa, When the compressive strength of concrete is 80.6 MPa, its KR value is only 0. 8 and decreases with the increase of chloride diffusion depth. In order to predict the life of solid structure in salt lake field environment more accurately, it is necessary to convert chlorine binding ability in indoor environment into chlorine ion binding capacity in field environment by using RE=2.687e-0.0142fc (0.0111-0.0002fcccxri).
【作者单位】：南昌工程学院土木与建筑工程学院;南京航空航天大学土木工程系;
【基金】：江西省教育厅科学技术研究项目(GJJ151140) 国家重点基础研究发展计划(“973”计划)(2009CB623203)
【分类号】：TU528

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