STUDY ON DISTRIBUTION OF STEEL CORROSION PRODUCTS IN CONCRETE STRUCTURES
This study investigated a reinforced concrete specimen that had deteriorated in an artificial environment for two years.Samples were made from the specimen and the steel/concrete interface and corrosion-induced cracks were observed by SEM operated in BSE mode and analysed by EDX.Rust distributions at steel/concrete interface and in adjacent concrete were observed and the mechanism was discussed.The thickness of corrosion-filled paste (CP) and its variation with the growth of steel corrosion reveal that the penetration of corrosion products into concrete and the forming of corrosion layer proceed simultaneously.Before concrete surface cracking during the corrosion process,the rust will neither fill the cracks nor penetrate the concrete adjacent to cracks.Based on the observations,a two-stage model,instead of the three-stage model,is proposed to describe the concrete cracking process induced by steel corrosion.
Steel reinforced concrete SEM rust interfaces cracks
Yingyao Wu Yuxi Zhao Weiliang Jin
Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P.R.China
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
272-277
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）