Experimental study on corrosion induced cracking time of steel in concrete cover with initial middle defect

2018 International Conference on Civil, Architecture and Disaster Prevention

土木建筑工程

Zuo, Guiqin^1 ; Zhang, Xiaogang^1 ; Cao, Mengting^1

Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen

518060, China^1

关键词: Accelerated corrosion;    Chloride environment;    Concrete cover;    Corrosion expansion;    Corrosion-induced crackings;    Different sizes;    Initial defects;    Steel in concretes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/218/1/012041/pdf
DOI  :  10.1088/1755-1315/218/1/012041

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

In this paper, based on the initial defects of different sizes in the middle of concrete cover, the corrosion cracking time of the steel with the initial defect in the middle part of the steel was studied by means of the method of electrified accelerated corrosion from an experimental point of view. The results show that the size of the actual initial defect in the concrete cover is the key factor to control the cracking time in chloride environment. Reducing the crack size is helpful to improve the durability of the whole structure. The severity of corrosion expansion and cracking time of concrete cover can be ranked as follows: Thickness of concrete cover > diameter of steel > size of initial defect.