PREDICTION MODEL OF THE STEEL CORROSION RATE IN THE CONCRETE UNDER HIGH HUMIDITY CONDITIONS

摘要：

Under high relative humidity (RH) environment condition,lots of water can beaccumulated in the region between steel bar and concrete,and the corrosion rate is controlledby the oxygen diffusion. In this paper,the model of corrosion rate of steel bar,whichconsidered the thickness of water layer and the area of oxygen diffusion,is deduced,and theexperimentations are also conducted. The results show that the corrosion rate of steel barincreases with increasing the water-cement ratio,and it decreases with increasing thethickness of concrete cover. The corrosion rate is also relevant with the position of the steelbar in the concrete; the corrosion rate of corner steel bar is about 1.6-2.1 times of the centralsteel bar.

关键词： steel corrosion rate oxygen diffusion concrete durability relative humidity

作者: Geng Ou Yuan Yingshu Li Shengwen

作者单位: SACE Department,China University of Mining and Technology,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 817-823

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）