In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Relationship between Reinforcing Bar Corrosion and Concrete Cracking
Author(s): Aimin Xu and Ahmad Shayan
Publication: Materials Journal
Appears on pages(s): 3-12
Keywords: chloride; concrete cover; corrosion; reinforcing steel; time-to-cracking
Abstract:This paper presents results of an investigation on the relationship between reinforcement corrosion rust growth at the concrete-steel interface and cracking of concrete cover, based on study of laboratory specimens containing various amounts of chloride ions. The corrosion depth of steel bars to cause cover cracking (critical depth) was found to vary from 5 µm (0.2 mil) for 24 mm (0.9 in.) bar under 25 mm (1 in.) cover, to 150 µm (5.9 mil) for 6 mm (0.2 in.) bar under 73 mm (2.9 in.) cover. The steel corrosion rate was found to be closely related to the amount of chloride in concrete. The applicability of existing equations on cover cracking is assessed and a new mathematical equation is proposed. The predicted critical corrosion depth by the equation matched with the experimental data reasonably well. A mathematical equation has been proposed for calculation of the time-to-cracking, which uses this model in combination with the law of chloride diffusion in concrete.
Click here to become an online Journal subscriber