U.S. Department of Transportation
Federal Highway Administration
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
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This report is an archived publication and may contain dated technical, contact, and link information |
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Publication Number: FHWA-RD-02-086 Date: August 2006 |
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Two types of concrete overlays (silica fume concrete (SFC) and latex–modified Type III portland cement concrete (LMC–III) were installed and tested as part of the Strategic Highway Research Program (SHRP) Project C–206: Optimization of Highway Concrete Technology—Bridge Deck Overlays. The two different overlay types were chosen for their ability to fill two different needs: use of SFC as a long-term, low-permeability overlay; and use of LMC–III as a high earlystrength concrete for use when traffic had to be restored after as little as 24 hours. This report summarizes the 5-year study to evaluate the long-term performance of the overlays. Evaluation and comparison of SFC and LMC–III overlays were performed at four locations. The test sites were in Ohio and Kentucky. Each location included SFC and LMC-III overlays on opposite directions of a bridge structure. All overlays were installed in 1992. This study evaluated the overlays each year between 1994 and 1998. All overlays had high initial bond strengths, and the bond strengths remained high over the study period when tested away from delaminations. The overlays were generally rated as good condition in 1998, after 6 years of service, though some individual sites were rated as fair due to extensive cracking. Though good performance was achieved from both SFC and LMC-III overlays, the service life of the overlays tended to vary based on the site location. Generally, cracking and delamination of the overlays tend to increase with time. Typically, all overlays should be inspected biannually for cracking and delamination and routine maintenance including consideration of crack and delamination repairs to extend the service life of the SFC and LMC–III overlays.
Gary L. Henderson
Director
Office of Infrastructure
Research and Development
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Technical Report Documentation Page
1. Report No. FHWA-RD-02-086 |
2. Government Accession No. |
3. Recipient's Catalog No. |
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4. Title and Subtitle Strategic Highway Research Program Highway Concrete Technology Development and Testing: Volume V—Field Evaluation of Strategic Highway Research Program (SHRP) C-206 Test Sites (Bridge Deck Overlays) |
5. Report Date August 2006 |
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6. Performing Organization Code |
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7. Author(s) Stephen R. Boyd and Paul D. Krauss; Wiss, Janney, Elstner Associates, Inc. |
8. Performing Organization Report No. |
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9. Performing Organization Name and Address ERES Division of Applied Research Associates, Inc. |
10. Work Unit No. (TRAIS) |
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11. Contract or Grant No. DTFH61-94-C-00009 |
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12. Sponsoring Agency's Name and Address Office of Engineering and Highway |
13. Type of Report and Period Covered Final Report |
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14. Sponsoring Agency's Code |
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15. Supplementary Notes FHWA Contracting Officer's Technical Representative: Monte Symons, P.E. This work was conducted under subcontract by Wiss, Janney, Elstner Associates, Inc. |
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16. Abstract Two types of concrete overlays (silica fume concrete (SFC) and latex-modified Type III portland cement concrete (LMC-III) were installed and tested as part of the Strategic Highway Research Program (SHRP) Project C-206: Optimization of Highway Concrete Technology—Bridge Deck Overlays. The two different overlay types were chosen for their ability to fill two different needs: use of SFC as a long-term, low-permeability overlay; and use of LMC-III as a high early-strength concrete when traffic had to be restored after as little as 24 hours. This report summarizes the 5-year study to evaluate the long-term performance of the overlays. Evaluation and comparison of SFC and LMC-III overlays were performed at four locations. The test sites were in Ohio and Kentucky. Each location included SFC and LMC-III overlays on opposite directions of a bridge structure. All overlays were installed in 1992. This study evaluated the overlays each year between 1994 and 1998. All overlays had high initial bond strengths, and the bond strengths remained high over the study period when tested away from delaminations. The overlays were generally rated as good condition in 1998, after 6 years of service, though some individual sites were rated as fair due to extensive cracking. Though good performance was achieved from both SFC and LMC-III overlays, the service life of the overlays tended to vary based on the site location. Generally, cracking and delamination of the overlays tend to increase with time. Typically, all overlays should be inspected biannually for cracking and delamination and routine maintenance, including consideration of crack and delamination repairs to extend the service life of the SFC and LMC-III overlays. |
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17. Key Words Concrete pavement, high early-strength, early opening, fulldepth repair |
18. Distribution Statement No restrictions. This document is available to the public through the National Technical Information Service, Springfield, VA 22161. |
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19. Security Classif. (of this report) Unclassified |
20. Security Classif. (of this page) Unclassified |
21. No. of Pages 80 |
22. Price |
Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
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