Performance of Epoxy-Coated Steel in Continuously Reinforced Concrete Pavementby Farrel J. Zwerneman, Oklahoma State Univ, Stillwater, United States,
Rex C. Donahey, Oklahoma State Univ, Stillwater, United States,
Hameed S. Syed, Oklahoma State Univ, Stillwater, United States,
Srinivas R. Gunna, Oklahoma State Univ, Stillwater, United States,
Abstract: Two sections of interstate highway in central Oklahoma were recently reconstructed. On both projects, northbound lanes were reinforced with epoxy-coated steel and southbound lanes were reinforced with uncoated steel. Two crack surveys were conducted over the entire length of both sections of new pavement. The results of these surveys show that epoxy-coating has no significant effect on crack spacing. Measured spacings and crack widths compare favorably to values calculated using the ACI and CRSI design methods. Additional variables evaluated include concrete strength, air temperature, and air content. The data indicate that air temperature and air content have the greatest impact on crack spacing. A second phase of the study involved the construction of laboratory specimens with either epoxy-coated or uncoated reinforcement. Cracks were artificially induced in specimens by placing them in tension. No significant differences were measured in either crack spacing or crack width.
Subject Headings: Reinforced concrete | Concrete pavements | Epoxy | Air temperature | Cracking | Reinforcing steel | Steel | Spacing | North America | Oklahoma | United States
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