Experimental determination of chloride penetration in cracked concrete beams

摘要：

Chloride-induced corrosion of reinforcement is one of the major causes of deterioration of reinforced concrete structures.This phenomenon is markedly influenced by the presence of service cracks.In this paper, the influence of flexural cracks on the chloride penetration in concrete was studied.Four cracked concrete beams under sustained loads and one unloaded beam were immersed in the 5％ NaCl solution, with the condition of dry-wet cycles.After 15 cycles, the chloride ion content at each cracked section was determined by rapid chloride test (RCT) method. The experimental results indicated that the chloride concentration and the equivalent apparent chloride diffusion coefficient increased with the increase of crack width.Finally, a regressive calculation model of the chloride penetration in the cracked concrete was proposed, and its accuracy was validated by the test results.

关键词： Chloride penetration Flexural crack Concrete Equivalent diffusion coefficient Experimental determination

作者: ZHANG Shao-feng LU Chun-hua LIU Rong-gui

作者单位: Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China

会议类型: 国际会议

会议名称: International Conference on Advances in Engineering 2011(2011年工程研究进展国际学术会议 ICAE2011)

会议地点: 南京

会议语种:英文

页码: 380-384

在线出版日期: 2011-12-17（万方平台首次上网日期，不代表论文的发表时间）