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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.
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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: Corrosion-Induced Cover Cracking: New Test Data and Predictive Models
Author(s): John A. Mullard and Mark G. Stewart
Publication: Structural Journal
Appears on pages(s): 71-79
Keywords: corrosion; cracking; deterioration; reinforced concrete structures
Abstract:This paper presents an improved model that will be used to predict the timing of corrosion-induced cover cracking for reinforced concrete (RC) structures in chloride environments. An accelerated corrosion experimental program measured concrete cover cracking for RC slabs based on various concrete covers, concrete tensile strengths, and reinforcing bar diameters. A new empirical crack propagation model based on the test data was then developed. A correction factor for concrete confinement is proposed to account for bars located at edges and corners of RC structures. A rate of loading correction factor is applied to allow the cracking times for accelerated corrosion rates to be adjusted for the lower corrosion rates generally found in RC structures. A statistical analysis of model accuracy is used to account for variabilities between model prediction and experimental data.
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