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Conference proceeding
Combined Use of High RAP Asphalt Mixtures with Rubber and Polymer Modifications for Pavement Maintenance Applications
International Conference on Transportation and Development 2024: Pavements and Infrastructure Systems, pp.257-269
International Conference on Transportation and Development 2024: Pavements and Infrastructure Systems (Atlanta, Georgia, USA, 06/15/2024–06/18/2024)
06/2024
Abstract
This paper investigated the use of high percentage recycled asphalt pavement (RAP) in combination with crumb rubber (CR) and ethylene-glycidyl-acrylate terpolymer for asphalt pavement maintenance applications. Hot asphalt mixtures were prepared according to the Superpave hot mix asphalt protocol. Combined mixtures were prepared with 40% RAP and single mesh size #20 CR modifier using a wet process (hereinafter CRW) and 40% RAP and ethylene-glycidyl-acrylate terpolymer (hereinafter EGA). Additionally, full RAP (100% RAP) mixtures prepared by petroleum-based rejuvenator and a conventional cold patching mixture (CPM) were studied to compare the relative mixture performances since pavement maintenance activities like pothole patching have historically been carried out with CPMs. All binders were modified using the same PG58-28 base binder. Dynamic modulus testing for linear viscoelastic characterization, flow number (FN) testing for rutting potential, and indirect tensile strength testing (ITS) for thermal cracking were conducted to assess the relative performance of the mixtures. The results revealed that the environmentally friendly and sustainable 100% hot RAP mixture and CRW and EGA combination mixtures outperformed the typical CPM in laboratory performance tests.
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Details
- Title
- Combined Use of High RAP Asphalt Mixtures with Rubber and Polymer Modifications for Pavement Maintenance Applications
- Publication Details
- International Conference on Transportation and Development 2024: Pavements and Infrastructure Systems, pp.257-269
- Resource Type
- Conference proceeding
- Conference
- International Conference on Transportation and Development 2024: Pavements and Infrastructure Systems (Atlanta, Georgia, USA, 06/15/2024–06/18/2024)
- Publisher
- American Society of Civil Engineers (ASCE)
- Copyright
- © 2024 American Society of Civil Engineers
- Identifiers
- 99380576594306600
- Academic Unit
- Hal Marcus College of Science and Engineering ; Mechanical Engineering
- Language
- English