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Title: RESEARCH PAYS OFF--REBAR TENDING: QUITE AN ART
Accession Number: 00379469
Record Type: Component
Availability: Find a library where document is available Abstract: As a part of a comprehensive project exploring a number of feasible approaches the National Bureau of Standards (NBS) was retained by FHWA to search the marketplace for a suitable coating material and coating process. FHWA provided the criteria for the screening of available materials and worked closely with NBS researchers during the study. As a result of this effort, four commercially available powder epoxy coatings were identified that could satisfy the criteria set up for the study. Specifications were developed and a coating process was identified that would provide an economical epoxy-coated rebar. Coatings were evaluated on the basis of their chemical and physical durabilities as well as their protective qualities. Attention was also directed to the application methods and surface preparation of the reinforcing steel. It was found that the pipe-coating industry could coat rebar with some minor modification of existing plants. Accordingly, FHWA researchers conferred with epoxy-coating producers, pipe coaters, and potential users to work out the problems of introducing a new product. Experimental application was undertaken in 1973 in Pennsylvania, only 3 years after the initiation of the study. This field-evaluation verified the practicality of epoxy-coated rebar and led to rapid implementation on a nationwide basis. FHWA continued research to further verify the long-term durability of the epoxy-coating material and process and to refine the specifications for the product. Analyses of life-cycle costs indicate that the use of epoxy-coated reinforcing steel in both mats of a typical bridge deck results in significant savings compared with any alternative option available to designers. Based on current U.S. construction of approximately 2.5 million sq yd per year of bridge deck requiring a protective system, the estimated costs over the design life of the bridges for epoxy-coated rebar are approximately $5 million per year below those for any other system. (Author)
Supplemental Notes: For further information on Rebar Tending, contact Richard Hay, HNR-1, FHWA, 6300 Georgetown Pike, McLean, Virginia, 22101. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Editors: Vumbaco, B JPagination: p. 14
Publication Date: 1983-9
Serial: TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; Maintenance and Preservation; Materials; I34: Steels and Metals
Files: TRIS, TRB
Created Date: Nov 30 1983 12:00AM
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