Technical Report Documentation Page 1. Report No. FHWA/TX-13/5-5123-03-1 2. Government Accession No. 3. Recipient's Catalog No. 4. Title and Subtitle IMPLEMENTATION OF TEXAS ASPHALT CONCRETE OVERLAY DESIGN SYSTEM 5. Report Date Published: August 2014 6. Performing Organization Code 7. Author(s) Sheng Hu, Fujie Zhou, and Tom Scullion 8. Performing Organization Report No. Report 5-5123-03-1 9. Performing Organization Name and Address Texas A&M Transportation Institute College Station, Texas 77843-3135 10. Work Unit No. (TRAIS) 11. Contract or Grant No. Project 5-5123-03 12. Sponsoring Agency Name and Address Texas Department of Transportation Research and Technology Implementation Office P. O. Box 5080 Austin, Texas 78763-5080 13. Type of Report and Period Covered Technical Report: Mar. 2009–Aug. 2012 14. Sponsoring Agency Code 15. Supplementary Notes Project performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration. Project Title: Pilot Implementation of the New Asphalt Overlay Design System URL: http://tti.tamu.edu/documents/5-5123-03-1.pdf 16. Abstract An asphalt overlay design system was developed for Texas Department of Transportation (TxDOT) under Research Project 0-5123. The new overlay design system, named the Texas Asphalt Concrete Overlay Design System (TxACOL), can help pavement engineers optimize asphalt overlay design in terms of overlay mix type and thickness, based upon existing pavement structure and conditions (existing distress types and/or load transfer efficiency at joints/cracks), local weather conditions, and anticipated traffic level. Several districts in Texas expressed interest in implementing this new overlay design system for designing asphalt overlays. To facilitate the implementation in districts, Project 5-5123-03 was initiated. The work performed under this study included (a) developing and conducting district-oriented overlay design workshops, (b) providing asphalt overlay design assistance and monitoring the new constructed overlays, (c) performing laboratory testing and updating the material default values of overlay mixes, (d) surveying the field performance (rutting and cracking) of asphalt overlay projects, and (e) enhancing and calibrating the TxACOL. This report documents the work and findings from this study. Case analyses showed that the enhanced TxACOL can make reasonable predictions compared to survey results. The researchers recommend that TxACOL be used as a tool for asphalt overlay design in TxDOT districts. Apparently, calibration factors still need to be further verified through more field test sections. 17. Key Words TxACOL, Overlay Design, Asphalt, Rutting, Cracking, Implementation 18. Distribution Statement No restrictions. This document is available to the public through NTIS: National Technical Information Service Alexandria, Virginia 22312 http://www.ntis.gov 19. Security Classif. (of this report) Unclassified 20. Security Classif. (of this page) Unclassified 21. No. of Pages 102 22. Price Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
IMPLEMENTATION OF TEXAS ASPHALT CONCRETE OVERLAY DESIGN SYSTEM
Apr 29, 2023
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