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: Cracking of Fresh Concrete as Related to Reinforcement
Author(s): Fadh H. Dakhil, Philip D. Cady, and Roger E. Carrier
Publication: Journal Proceedings
Appears on pages(s): 421-428
Keywords: bridge decks;corrsion;cover;cracking (fracturing); deicers; deterioration; photoelasticity;reinforced concrete; reinforcing steels.
Abstract:Numerous srudies have shown that corrosion of the top reinforcing steel leads to fracture planes and spalls or "potholes", the most serious form fo deterioration of concrete bridge decks. Those studies also showed that the depth of concrete cover over the top reinforcement is a major determinant of the occurance of deterioration. The research reported here was undertaken to quantify the effect of depth of coverand two other variables, concrete slump and reinforcement bar size, on the tendency to produce the subsidence cracks over the reinforcement that lead to corrosion of the reinforcement. A photoelastic study was also undetaken to determine the magnitudes of the tensile stresses above the reinforcement as a function of depth of cover. Finally, a corrosion study was carried out to verify that sunsidence cracking over the reinforcement leads to corrosion of the reinforcement in the presence of deicing salts. The conclusions from this study were: (1) depth of cover significantly affects subsidence cracking, (2) corrosion potentials are significantly higher for cracked concrete, and (3) tensile stresses over reinforcing bats due to body stresses in fresh concrete increase sharply with decreasing cover.
Click here to become an online Journal subscriber