氯离子渗透性试验研究  

Chloride Ion Permeability Test Study

作　　者：姚剑虹 Yao Jianhong(Gansu Hengshi Highway Testing Technology Co.,Ltd.,Lanzhou 730000,China)

机构地区：[1]甘肃恒石公路检测科技有限公司,甘肃兰州730000

出　　处：《科学技术创新》2022年第7期57-60,共4页Scientific and Technological Innovation

摘　　要：评价混凝土在一定侵蚀条件下的耐久性,通常可以用扩散系数来反映。该指标可以通过Fick第二定律[1]来进行研究。其准确性与混凝土结构的寿命测算紧密相关。扩散系数的数值反映了氯离子在钢筋混凝土中扩散能力的大小,其数值不仅与混凝土空隙的多少、配合比及分布特点等多种内部因素有关,还和外部因素也直接相关。如混凝土龄期、环境温度、外掺剂的品种等。因此,氯离子在不同混凝土中的扩散各不相同,在各类工程项目中表现出明显的差异。To evaluate the durability of concrete under certain erosion conditions,it can usually be reflected by the diffusion coefficient.This indicator can be studied by Fick's second law[1].Its accuracy is closely related to the life estimation of concrete structures.The value of diffusion coefficient reflects the diffusivity of chloride ions in reinforced concrete.Its value is not only related to various internal factors such as the number of concrete voids,mix ratio and distribution characteristics,but also directly related to external factors.Such as concrete age,ambient temperature,type of admixture,etc.Therefore,the diffusion of chloride ions in different concretes is different,showing obvious differences in various engineering projects.

关 键 词：氯离子 扩散系数 渗透性 FICK第二定律 

分 类 号：TU528.041[建筑科学—建筑技术科学]