摘要
为研究弯曲应力对混凝土中氯离子扩散的影响,开展了室内加速氯离子侵蚀试验。采用质量浓度为5%的海盐溶液,对受弯曲应力的混凝土试件进行全浸泡试验,得到了氯离子浓度随时间和深度的变化规律。基于Fick第二定律,拟合得到氯离子扩散系数和表面氯离子浓度,得出弯曲应力对扩散系数影响的拟合公式。
To study the effect of bending stress on chloride ion diffusion in concrete,accelerated chloride ion erosion test was carried out in laboratory.Full immersion test were done with concrete specimen under bending stress in sea salt solution of 5%mass concentration.The variation law of chloride ion concentration with time and depth was obtained.The chloride ion diffusion coefficient and surface chloride concentration were obtained by fitting with Fick’s second law.The fitted formula of the effect of bending stress on diffusion coefficient was also obtained.
作者
李鹤
徐志鹏
吴桐
LI He;XU Zhipeng;WU Tong(North East Electric Power Design Institute Co.,Ltd.,of China Power Engineering Consulting Group,Changchun 130021,China)
出处
《低温建筑技术》
2021年第5期41-46,共6页
Low Temperature Architecture Technology
关键词
混凝土
氯离子侵蚀
弯曲应力
concrete
chloride ion erosion
bending stress
