混凝土内变形钢筋锈蚀速率时变规律试验研究  

Experimental Research on Time-Varying Regularity of Deformed Reinforcement Corrosion Rate in Concrete

作　　者：彭涛[1] 陈瑞[1] 徐惠[1] 朱珉[1] 张先扬[1] 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008

出　　处：《徐州建筑职业技术学院学报》2009年第1期13-16,共4页Journal of XUZHOU Institute of Architectural Technology

基　　金：国家自然科学基金资助项目(50538087;50478100);中国矿业大学校基金资助项目(OB061045)

摘　　要：基于钢筋锈蚀的混凝土结构使用寿命预测的一个重要问题是建立混凝土内钢筋锈蚀速率模型.通过试验研究得出不同水灰比对钢筋锈蚀速率时变规律的影响,即水灰比越大钢筋的锈蚀速率越高.同时研究了钢筋锈蚀速率的时变规律,在恒定气候条件下,其多变过程可分为锈蚀初期的下降阶段、平稳发展阶段和混凝开裂后的上升阶段.To establish the theory prediction model of reinforcement corrosion rate in concrete is the key to the service life estimation of reinforced concrete structure with regard to reinforcement corrosion. The experimental research resulted in the influences of different water-cement ratios on the time-varying regularity of reinforcement corrosion rate, that was, the greater the watercement ratio the higher the reinforcement corrosion rate. Meanwhile, a study was carried out on the time-variable regularity of bar corrosion rate, which revealed that under conditions of constant climate the time-dependent process was divided into three stages： the descending stage just after the corrosion, the stationary development stage and the ascending stage after the concrete cracking.

关 键 词：钢筋锈蚀速率 时变规律 预测模型 

分 类 号：TU375[建筑科学—结构工程]