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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Publication Number: FHWA-RD-02-085 Date: July 2006 |
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The objective of this study was to monitor and evaluate the performance of experimental fulldepth repairs made with high-early-strength (HES) materials placed under Strategic Highway Research Program (SHRP) project C-206, Optimization of Highway Concrete Technology. The C-206 full-depth repair experiment was conducted to demonstrate and validate the technologies that allow early opening of full-depth portland cement concrete (PCC) pavement repairs to traffic and to document the information needed to apply this technology.
The experimental factors for the full-depth repair experiment included material type, strength at opening, and repair length. A total of 11 different HES concrete mixes with opening times ranging from 2 to 24 hours were evaluated at 2 field sites (U.S. I-20, Augusta, GA, and State Route 2, Vermilion, OH).
One goal of the SHRP C-206 full-depth repair experiment was to establish guidelines for the minimum strength required at opening time to ensure adequate performance of full-depth PCC pavement repairs. Based on analytical results, guidelines for early opening of full-depth PCC pavement repairs were developed under SHRP C-206; however, long-term monitoring was needed to verify the guidelines developed under SHRP C-206—that task was carried out under this study.
This report presents the results of annual surveys and analysis of the collected data. The report for each site begins with a brief description of the field sections, followed by a discussion of performance of test sections. Finally, conclusions and recommendations for possible changes to fast-track full-depth repair practice are provided based on findings of this study.
Gary L. Henderson
Director
Office of Infrastructure
Research and Development
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1. Report No. FHWA-RD-02-085 |
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 IV—Field Evaluation of Strategic Highway Research Program (SHRP) C-206 Test Sites (Early Opening of Full-Depth Pavement Repairs) |
5. Report Date July 2006 |
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6. Performing Organization Code |
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7. Author(s) H. Thomas Yu, Jagannath Mallela, and Michael I. Darter |
8. Performing Organization Report No. |
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9. Performing Organization Name and Address ERES Division of Applied Research |
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. |
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16. Abstract The objective of this study was to monitor and evaluate the performance of experimental full-depth repairs made with highearly-strength (HES) materials placed under Strategic Highway Research Program (SHRP) project C-206, Optimization of Highway Concrete Technology. The C-206 full-depth repair experiment was conducted to demonstrate and validate the technologies that allow early opening of full-depth portland cement concrete (PCC) pavement repairs to traffic and to document the information needed to apply this technology. The experimental factors for the full-depth repair experiment included material type, strength at opening, and repair length. A total of 11 different HES concrete mixes with opening times ranging from 2 to 24 hours were evaluated at 2 field sites (U.S. I-20, Augusta, GA and State Route 2, Vermilion, OH). The scope of this study included 5-year monitoring of SHRP C-206 full-depth experiment sections, analyzing the data, and revising the guidelines for early opening of full-depth PCC pavement repairs as needed. The monitoring program consisted of annual visual distress surveys to monitor the development of cracking, faulting, and spalling. The annual surveys were conducted from the fall of 1994 through the fall of 1998. The results of this evaluation showed that full-depth repairs made with HES PCC can provide good long-term performance; however, adverse temperature conditions during installation can cause premature failures. Extremely high PCC temperatures during curing should also be avoided. The fatigue damage due to early opening is negligible, especially for repairs of 3.7 m or shorter. Within the range of strength evaluated under SHRP C-206, the strength at opening could not be correlated to performance. Based on the results of this evaluation, no changes are recommended to the opening criteria suggested in the SHRP C-206 manual of practice. |
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17. Key Words Concrete pavement, high-early-strength, early opening, full-depth 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 51 |
22. Price |
Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
SI (Modern Metric) Conversion Factors
Appendix A. Summary of Annual Survey Results
Appendix B. Summary Tables of Annual Survey Data