非饱和混凝土中氯离子的毛细吸附  

Capillary Absorption of Chloride Ions in Unsaturated Concrete

作　　者：王本臻[1] 金祖权[1] 卢峰[1] 曹元超[1] 李春龙 

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]临沂市兰山区住房和城乡建设局,临沂276000

出　　处：《腐蚀与防护》2012年第10期864-866,共3页Corrosion & Protection

基　　金：国家自然科学基金(51178230;50739001);山东省自然科学基金(ZR2009FQ011;ZR1009FQ014)

摘　　要：将混凝土置于不同湿度空间,通过不同时间的毛细吸附,测试混凝土中自由氯离子浓度分布。分析了不同湿度、腐蚀时间和腐蚀溶液对混凝土中氯离子传输的影响。结果表明,随着混凝土内部相对湿度的降低,混凝土的毛细吸附能力增强。随着腐蚀时间的增长,氯离子的渗透深度逐步加深,且前期随吸附时间快速增加,后期增加速率降低。同时呈现出氯离子含量在混凝土表层增长较快,而内部较缓。复合离子的存在加速了混凝土的氯离子毛细吸收速度。The influence of relative humidity on chloride ion transportation in concrete was investigated. The tested concrete was placed in different humidity environments. Free chloride ion contents in concrete were tested at different times and different depths, and the influence of humidity, corrosion time and solution on chloride ion transportation in concrete was analyzed. It was found that with the decrease of relative humidity in concrete, the ability of capillary absorption of concrete became stronger. With the increase of corrosion time, the penetration depth of chloride ions got deeper gradually, and absorption rate in early time was faster than in later period. In addition, the chloride ion content in the surface increased more rapidly than inside the concrete. Compound ions accelerated the capillary absorption speed of chloride ions in concrete.

关 键 词：混凝土 相对湿度 毛细吸收 氯离子 

分 类 号：O647.32[理学—物理化学]