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Publication Number: FHWA-HRT-05-081
Date: October 2005

Design of Continuously Reinforced Concrete Pavements Using Glass Fiber Reinforced Polymer Rebars

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FOREWORD

This report, Design of Continuously Reinforced Concrete Pavements Using Glass Fiber Reinforced Polymer Rebars, investigates the effects on stress development in pavement and on critical design factors from substituting glass fiber reinforced polymer (GFRP) reinforcement for conventional steel reinforcement in continuously reinforced concrete pavements (CRCPs) in order to determine the performance characteristics of the GFRP-reinforced concrete pavements. The results of this study target the design of CRCPs with GFRP rebars as an applicable reinforcement and the proposal of feasible GFRP-CRCP designs to be constructed.

This report will be useful to those interested in the effect of GFRP reinforcing rebars on shrinkage and thermal stresses in concrete as studied using analytical and numerical methods as well as experimental measurements. This study proposes a series of designs for the GFRP-reinforced CRCP based on the numerical and mechanistic results, and reveals areas recommended for further investigation.

Gary L. Henderson
Director, Office of nfrastructure Research and Development

Notice

This document is disseminated under the sponsorship of the U.S. Department of Transportation and the State of West Virginia in the interest of information exchange. The U.S. Government and the State of West Virginia assume no liability for the use of the information contained in this document. This report does not constitute a standard, specification, or regulation.

The U.S. Government and the State of West Virginia do not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report only because they are considered essential to the objective of the document.

Quality Assurance Statement

The Federal Highway Administration (FHWA) provides high-quality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.

1. Report No
FHWA-HRT-05-081
2. Government Accession No.
N/A
3. Recipient's Catalog No.
N/A
4. Title and Subtitle
Design of Continuously Reinforced Concrete Pavements Using Glass Fiber Reinforced Polymer Rebars
5. Report Date
Oct. 2005
6. Performing Organization Code
N/A
7. Authors(s)
Jeong-Hoon Choi and Roger H. L. Chen, Ph.D.
8. Performing Organization Report No.
N/A
9. Performing Organization Name and Address
Department of Civil and Environmental Engineering
West Virginia University
Morgantown, WV 26506
10. Work Unit No. (TRAIS)
N/A
11. Contract or Grant No.
DTFH61-99-X-00078
13. Type of Report and Period Covered
 
12. Sponsoring Agency Name and Address
Office of Research and Technology Services
Federal Highway Administration
6300 Georgetown Pike
McLean, VA 22101
14. Sponsoring Agency Code
15. Supplementary Notes
The Contracting Officer's Technical Representative on this contract was Peter Kopac, Pavement Materials and Construction Team.
16. Abstract
This is Task 3: Continuously Reinforced Concrete Pavement. The corrosion resistance characteristics of glass fiber reinforced polymer (GFRP) rebars make them a promising substitute for conventional steel reinforcing rebars in continuously reinforced concrete pavements (CRCPs). Studies are conducted on the effect of using GFRP rebars as reinforcement in CRCP on concrete stress development, which is directly related to the concrete crack formation that is inevitable in CRCP. Under restrained conditions, concrete volume change because of shrinkage and temperature variations is known to cause early-age cracks in CRCP. In this study, an analytical model has been developed to simulate the shrinkage and thermal stress distributions in concrete due to the restraint provided by GFRP rebars in comparison with the stresses induced by steel rebars. The results show that the stress level in concrete is reduced with GFRP rebars because of a low Young's modulus of GFRP. In addition, the analytical model has been used to estimate concrete strain variation in reinforced concrete slabs because of changes in concrete volume, and the results were compared with the experimental observation. Finite element (FE) methods are also developed to predict the stress distribution and crack width in the GFRP-reinforced CRCP section that is subjected to the concrete volume changes under various CRCP design considerations, such as the coefficient of thermal expansion (CTE) of concrete, the friction from the pavement's subbase, and the bond-slip between concrete and reinforcement. Based on the results from the FE simulation along with the mechanistic analysis, a series of feasible designs of the GFRP-reinforced CRCP is proposed. The stress levels in the GFRP reinforcement, the crack widths, and the crack spacings of the proposed pavements are shown to be within the allowable design requirements.
17. Key Words
GLASS FIBER REINFORCED POLYMER, CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS, REBARS, CONCRETE STRESS
18. Distribution Statement
No restrictions. This document is available to the Public through the National Technical Information Service; Springfield, VA 22161
19. Security Classif. (of this report)
Unclassified
20. Security Classif. (of this page) 21. No. of Pages
79
22. Price
N/A

Form DOT F 1700.7 (8-72) Reproduction of completed page authorized (art. 5/94)

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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