The Impact of Concrete Cover Thickness and Chemical Alkalinity on Reinforcement Corrosion

Abstract:

Based on the mechanism of reinforcement corrosion in concrete structures and the experimental measurements of corrosion potential and resistance, this paper investigates the impact of concrete cover thickness and chemical alkalinity on reinforcement corrosion. Experimental results show that the rate of reinforcement corrosion decreases as the thickness of concrete cover of reinforcement increases. Moreover, given no risk of alkali-aggregate reaction, raising the chemical alkalinity of concrete cover helps maintain passivation of reinforcement. Additionally, under general atmospheric conditions, cracks that are not along bars barely affect structural durability if the width of cracks is smaller than its standard limit.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 1957-1963
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1957
• Online since: December 2014
• Authors: Xiu Jing Zhou, Jia Ming Shu*, Ji Dong Zhang, Yong Xian Yan, Wei Zhong Gan
• Keywords: Chemical Alkalinity, Concrete Structure, Cover Thickness, Cracks that Are not along Bars, Reinforcement Corrosion

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