不同干湿制度下氯离子在混凝土中的传输特性
发布时间：2018-11-23 08:07
【摘要】：设计了8种干湿循环侵蚀制度,定量分析了不同侵蚀制度同混凝土中氯离子传输深度、氯离子含量分布规律、表面氯离子含量、氯离子扩散系数、对流区及氯离子传输效率之间的关系.结果表明:干湿循环加速氯离子的传输仅限于一定范围;不同干湿制度下,表面氯离子含量随干湿比的增加而有所增加;干湿循环下混凝土中对流区的出现具有时间性;随着干湿循环周期的增加,对流峰值以幂函数增加,且干湿比越大越有利于氯离子峰值浓度的积累;干湿循环制度不同,但干湿循环1个周期的时间相同且干湿比为5:1时,氯离子向混凝土内的传输效率最高.
[Abstract]:Eight kinds of dry-wet cyclic erosion systems were designed, and the chloride transport depth, chloride content distribution, surface chlorine ion content, chloride diffusion coefficient of concrete with different erosion systems were quantitatively analyzed. The relationship between the convection region and the transport efficiency of chloride ions. The results show that the accelerated chlorine ion transport is limited to a certain range, the surface chlorine ion content increases with the increase of dry-wet ratio under different dry-wet systems, and the emergence of convective zone in the concrete under dry and wet cycles is time-dependent. With the increase of cycle period, the peak value of convection increases by power function, and the larger the ratio of dry and wet is, the more the accumulation of the peak concentration of chloride is. The dry and wet cycle systems are different, but when the dry and wet cycle time is the same and the dry-wet ratio is 5:1, the transport efficiency of chloride ions into concrete is the highest.
【作者单位】： 三峡大学土木与建筑学院;三峡地区地质灾害与生态环境湖北省协同创新中心;
【基金】：国家自然科学基金资助项目(51109121,51379111) 湖北省自然科学基金资助项目(2012FFB03803) 中国水利水电科学研究院开放基金资助项目(IWHRKF201009)
【分类号】：TU528
[Abstract]:Eight kinds of dry-wet cyclic erosion systems were designed, and the chloride transport depth, chloride content distribution, surface chlorine ion content, chloride diffusion coefficient of concrete with different erosion systems were quantitatively analyzed. The relationship between the convection region and the transport efficiency of chloride ions. The results show that the accelerated chlorine ion transport is limited to a certain range, the surface chlorine ion content increases with the increase of dry-wet ratio under different dry-wet systems, and the emergence of convective zone in the concrete under dry and wet cycles is time-dependent. With the increase of cycle period, the peak value of convection increases by power function, and the larger the ratio of dry and wet is, the more the accumulation of the peak concentration of chloride is. The dry and wet cycle systems are different, but when the dry and wet cycle time is the same and the dry-wet ratio is 5:1, the transport efficiency of chloride ions into concrete is the highest.
【作者单位】： 三峡大学土木与建筑学院;三峡地区地质灾害与生态环境湖北省协同创新中心;
【基金】：国家自然科学基金资助项目(51109121,51379111) 湖北省自然科学基金资助项目(2012FFB03803) 中国水利水电科学研究院开放基金资助项目(IWHRKF201009)
【分类号】：TU528
【参考文献】
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