摘要
基于干湿循环条件下混凝土氯离子渗透的模型试验,研究了海洋复杂环境下水泥砂浆试件中水溶性氯离子的迁移规律。试验结果表明:干湿循环条件下,水泥砂浆试件中的水溶性氯离子浓度随着氯盐溶液浓度的增大和侵蚀时间的延长而增大;混凝土试件中水溶性氯离子浓度与扩散深度之间呈对数函数关系,随着扩散深度的增加,水溶性氯离子浓度增大的幅度逐渐减小。通过模型试验研究了海洋复杂环境下水泥砂浆中水溶性氯离子的迁移规律,为海洋氯盐中混凝土结构设计和耐久性评估提供理论依据。
Based on the model experiment of chloride ion penetration under ocean dry-wet cycle conditions, the transferring rule of chloride ion penetration in cement mortar was studied. The experiment result indicated that the free chloride ion concentration in cement mortar was increased with the increase of the chloride concentration and erosion time, and the increased range of chloride ion was decreased with the increase of diffusion depth. There is a logarithmic function relation between free chloride ion concentration and diffusion depth. The free chloride ion migration patterns under complicated environment were concluded by the model experiment, which provided a theory basis for the design and durability assess of ocean concrete structure.
出处
《施工技术》
CAS
北大核心
2013年第24期75-77,共3页
Construction Technology
关键词
水泥
干湿循环
水溶性氯离子
迁移
扩散
cement
dry-wet cycle
free chloride ions
penetration
diffusion
