人防工程混凝土结构耐久性试验研究  

Durability Test of Concrete Structure in Civil Air Defence Engineering

作　　者：朱秀芹 Zhu Xiuqin(Development and Reform Bureau of Zouping City,Zouping,Shandong 256200)

机构地区：[1]邹平市发展和改革局,山东邹平256200

出　　处：《江西建材》2024年第12期57-59,共3页

摘　　要：为提升人防工程混凝土的耐久性能,文中主要对比分析了碳化时间和循环次数对混凝土氯离子含量、碳化深度以及碳酸钙含量的影响。结果表明,混凝土内部自由氯离子含量在表面深度分布区域包括对流区、扩散区及平稳区;碳酸钙含量在表面深度分布区域包括表面浮浆区、完全碳化区、部分碳化区和未碳化区。随着循环次数的增加,完全碳化区间有所增加;混凝土碳化深度排序为6%NaCl<清水<3%NaCl,即氯离子浓度越高,混凝土抗碳化性能越强。In order to improve the durability of civil air defense concrete,the effects of carbonization time and cycle times on chloride ion content,carbonization depth and calcium carbonate content of concrete were analyzed.The results show that the surface depth distribution of free chloride content in concrete includes convection zone,diffusion zone and stable zone.The distribution of calcium carbonate content in the surface depth includes the surface floating slurry area,the complete carbonization area,the partial carbonization area and the uncarbonized area.With the increase of the number of cycles,the total carbonization area increased.The order of concrete carbonation depth is 6%NaCl<3%NaCl in clear water,that is,the higher the chloride ion concentration,the stronger the concrete carbonation resistance.

关 键 词：人防工程 混凝土结构 影响因素 抗氯离子性能 碳化性能 

分 类 号：TU528[建筑科学—建筑技术科学]