FACTORS INFLUENCING CHLORIDE TRANSPORT AND CHLORIDE THRESHOLD LEVEL FOR THE PREDICTION OF SERVICE LIFE OF CONCRETE STRUCTURES
In this study,the influence of parametric values on the risk of steel corrosion inconcrete was quantitativey calculated in terms of the sensitivity to service life of concretestructures subjected chloride attack. Prior to the analysis,a thorough literature review on thechloride threshold level (CTL) for steel corrosion and the rate of chloride transport wasperformed to define the influencing factors. As a result,it was found that the CTL can bequantitatively represented in the form of total chloride content by weight of cement,reflectingboth the corrosiveness and inhibition effect. For chloride transport,diffusion is the maindriving force for chloride ions in concrete,although other driving forces such as permeationand sorption simultaneously exist. Finally,the sensitivity analysis of parametric values usingthe Ficks second law for the prediction of service life of concrete structures due to chlorideinduced corrosion found that the concrete cover depth is the most influencing to the time tocorrosion,followed by the surface chloride concentration,apparent diffusion coefficient andthe CTL.
chloride threshold level transport service life concrete structures
Ha-Won Song Ki Yong Ann Seung-Woo Pack Chang-Hong Lee Kewn Chu Lee
School of Civil and Environmental Engineering,Yonsei University,Seoul 120-749,Korea
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
153-164
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）