摘要
利用离子迁移实验和混凝土表面电阻率两种实验方法原位测试5种钢筋混凝土箱梁保护层混凝土的氯离子扩散系数和混凝土表面电阻率,讨论原位测试结果与实验室里ASTM C1202电通量测量值的相关性,建立保护层混凝土氯离子扩散系数与混凝土表面电阻率之间的数学关系式,利用原位测试的氯离子扩散系数评价了钢筋混凝土箱梁在海洋环境条件中的使用寿命。研究结果表明,在稳态下混凝土结构表面保护层混凝土的氯离子扩散系数和混凝土表面电阻率与6 h电通量具有较好的相关性,可以采用离子迁移实验和混凝土表面电阻率两种实验方法进行在原位测试和评价混凝土的渗透性,混凝土表面电阻率在工程应用上更为简便。
With Permit ion migration experiments and concrete surface resistivity test the chloride ion diffusion coeffi cient and the concrete surface resistivity of the five concretes were measured and the relation between in situ results and ASTM C1202 electric flux for 6 h in the laboratory were analyzed. The mathematical relationship between a protective layer of concrete chloride ion diffusion coefficient and surface resistivity of concrete was established, and the service life of reinforced concrete beams was calculated by in situ testing results under the marine environment. The results showed that there was good correlation between the concrete surface resistivity of the concrete cover, in the steady state the ac tion of chloride diffusion coefficient and 6 h charge. Permit experiments and the concrete surface resistivity were tested and evaluated the permeability of the concrete in situ, and concrete surface resistivity was easy in engineering applica tions.
出处
《山东大学学报（工学版）》
CAS
北大核心
2013年第5期74-79,共6页
Journal of Shandong University（Engineering Science）
基金
中国博士后基金资助项目(20060400284)
福建省自然科学基金资助项目(2008J0171)
厦门市科技计划资助项目(3502Z20113033)
关键词
混凝土保护层
氯离子扩散系数
混凝土表面电阻率
原位
渗透性
耐久性
concrete cover
chloride diffusion coefficient
concrete surface resistivity
in situ
permeability
durability
