STUDY ON MODULUS OF RUST APPLIED IN STEEL CORROSION INDUCED CONCRETE CRACKING MODEL
After steel corrosion initiates,the volume of rust is larger than the original steel,inducing an internal pressure on the surrounding confining concrete to crack the cover. Therefore,the rust is one of the most influential factors during the concrete cracking process due to corrosion. Five natural rust and one electrochemical steel corrosion were investigated in this study. The oedometer tests were used to analyze the mechanical behavior of the powder rust samples,the modulus of these six types of rusts were then deduced according to Hertz contact theory. The experimental results show that the modulus of rust increased with the load increasing,the rust is not a linear elastic material behavior. The natural rust and the electrochemical steel corrosion have different mechanical properties; therefore,the investigation of natural rust can not be replaced by that of the electrochemical corrosion products. The rust samples with different sizes have different mechanical properties,the modulus of rust decreases with the increase of its volume and tends to be a constant,102 MPa,which can be referred to when analyzing the concrete cover cracking due to reinforcement corrosion.
Concrete cracking Rust Oedometer test Hertz contact theory Mechanical behavior
Yu-Xi Zhao Hai-Yang Ren Wei-Liang Jin
Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,P.R.China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1218-1223
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）