Evaluation of Enhanced-Friction Asphalt Overlays and Surface Treatments
This project will evaluate alternative asphalt-based solutions, both thicker asphalt mixtures and thinner asphalt-based surface treatments, that may provide similar frictional benefits to HFSTs, but with reduced cost and/or increased durability. Specifically, this project will explore potential high friction aggregate options that could be used in Florida and can be incorporated into asphalt mixtures and/or surface treatments. The project will explore and optimize the type(s) and amount of high friction aggregate(s) needed in existing Florida Department of Transportation (FDOT) friction courses (FC-4.75, FC-9.5, and FC-5) containing other aggregates commonly used in Florida for surface mixtures (south Florida limestone and Georgia granite) to significantly improve the frictional characteristics of these mixtures. Note 1: FC-4.75 has been used on occasion by FDOT. It is governed by a developmental specification located on the Department’s website. FC-4.75 can be placed thinner than traditional dense graded friction courses commonly used by the Department and may provide a more cost-effective option than FC-9.5. The project will also determine the most cost-effective measure for improving friction characteristics to multiple prescribed levels.
Language
- English
Project
- Status: Completed
- Funding: $240000
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Contract Numbers:
BED59
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Sponsor Organizations:
Florida Department of Transportation
Research Center
605 Suwannee Street MS-30
Tallahassee, FL United States 32399-0450 -
Project Managers:
Chami, Ahmad
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Performing Organizations:
Department of Civil Engineering
238 Harbert Engineering Center
Auburn, AL United States 36849 -
Principal Investigators:
Moore, Nathan
- Start Date: 20220422
- Expected Completion Date: 20240630
- Actual Completion Date: 20240718
Subject/Index Terms
- TRT Terms: Aggregates; Friction; Overlays (Pavements); Surface treating
- Geographic Terms: Florida
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01895144
- Record Type: Research project
- Source Agency: Florida Department of Transportation
- Contract Numbers: BED59
- Files: RIP, STATEDOT
- Created Date: Oct 3 2023 8:50AM