疲劳荷载下水泥砂浆中氯离子渗透行为研究
Study on chloride permeation behavior in cement mortar under fatigue load
刘淑贤 1柳磊 1黄敦文 1粟淼 1彭晖2
作者信息
- 1. 长沙理工大学 土木工程学院,湖南 长沙 410114
- 2. 长沙理工大学 土木工程学院,湖南 长沙 410114;长沙理工大学 南方地区桥梁长期性能提升技术国家地方联合工程实验室,湖南 长沙 410114
- 折叠
摘要
为了探讨疲劳荷载作用下混凝土中氯离子的传输行为,自行设计装置开展了砂浆疲劳和氯盐共同作用试验,运用比裂缝面积表征试件损伤,分析了不同疲劳荷载水平下的砂浆损伤和氯离子传输性能,探讨了砂浆损伤与氯离子传输的相关性.研究表明:当疲劳上限小于0.4倍试件强度时,氯离子扩散系数增长缓慢;当疲劳上限大于0.4倍试件强度时,氯离子扩散系数增长加快,且随着疲劳荷载水平的增大,砂浆损伤不断增加.
Abstract
The self-designed device carried out the mortar fatigue and chloride salt joint action test to explore the chloride ion transport behavior in concrete under fatigue load.The specific crack area was used to characterize the damage of the specimen and analyze the mortar damage and chloride ion transport performance under different fatigue load levels.The correlation between mortar damage and chloride ion transport was disscussed.The results indicated that when the upper limit of fatigue is less than 0.4 times the strength of the specimen,the chloride diffusion coefficient increases slowly.When the upper limit of fatigue is greater than 0.4 times the strength of the specimen,the growth of chloride diffusion coefficient accelerates.The mortar damage increases with the increase of fatigue load level.
关键词
疲劳荷载/氯离子渗透/比裂缝面积/损伤Key words
fatigue load/chloride ion permeation/specific crack area/damage引用本文复制引用
基金项目
国家自然科学基金资助项目(51578078)
出版年
2024
NETL
NSTL
万方数据