Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments
High Friction Surface Treatments (HFST) are recognized for their effectiveness in enhancing skid resistance and reducing road accidents. While Epoxy-based HFSTs are widely applied, they present limitations such as compatibility issues with existing pavements, high installation and removal costs, and...
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2025-01-01
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| author | Alireza Roshan Magdy Abdelrahman |
| author_facet | Alireza Roshan Magdy Abdelrahman |
| author_sort | Alireza Roshan |
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| description | High Friction Surface Treatments (HFST) are recognized for their effectiveness in enhancing skid resistance and reducing road accidents. While Epoxy-based HFSTs are widely applied, they present limitations such as compatibility issues with existing pavements, high installation and removal costs, and durability concerns tied to substrate quality. As an alternative to traditional Epoxy-based HFSTs, this study investigated the effects of aggregate gradation as designated by agencies on the performance of asphalt-based HFST. Various aggregate types were assessed to evaluate friction performance and the impact of polishing cycles on non-Epoxy HFST. It was found that adjustments in aggregate size and gradation may be necessary when transitioning to asphalt-based HFSTs, given the different nature of asphalt as more temperature susceptible compared to Epoxy. Various asphalt binder grades were considered in this study. A series of tests, including the British Pendulum Test (BPT), Dynamic Friction Tester (DFT), Circular Track Meter (CTM), Micro-Deval (MD), and Aggregate Imaging Measurement System (AIMS), were conducted to measure Coefficient of Friction (COF), Mean Profile Depth (MPD), texture, and angularity before and after polishing cycles. The results showed that the COF in asphalt-based slabs decreased more significantly than in Epoxy-based slabs as polishing cycles increased for HFST and medium gradations. However, in coarse gradation, the COF of slabs using asphalt-based binder matched or even surpassed that of Epoxy after polishing. Notably, the PG88-16 binder for Calcined Bauxite (CB) had the smallest reduction in COF after 140K polishing cycles, with only a 19% decrease compared to a 23% reduction for Epoxy. |
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| institution | Kabale University |
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| spelling | doaj-art-5e89e775b0a7451baaebd083def466102025-08-20T03:43:02ZengMDPI AGCivilEng2673-41092025-01-0161410.3390/civileng6010004Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface TreatmentsAlireza Roshan0Magdy Abdelrahman1Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USADepartment of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USAHigh Friction Surface Treatments (HFST) are recognized for their effectiveness in enhancing skid resistance and reducing road accidents. While Epoxy-based HFSTs are widely applied, they present limitations such as compatibility issues with existing pavements, high installation and removal costs, and durability concerns tied to substrate quality. As an alternative to traditional Epoxy-based HFSTs, this study investigated the effects of aggregate gradation as designated by agencies on the performance of asphalt-based HFST. Various aggregate types were assessed to evaluate friction performance and the impact of polishing cycles on non-Epoxy HFST. It was found that adjustments in aggregate size and gradation may be necessary when transitioning to asphalt-based HFSTs, given the different nature of asphalt as more temperature susceptible compared to Epoxy. Various asphalt binder grades were considered in this study. A series of tests, including the British Pendulum Test (BPT), Dynamic Friction Tester (DFT), Circular Track Meter (CTM), Micro-Deval (MD), and Aggregate Imaging Measurement System (AIMS), were conducted to measure Coefficient of Friction (COF), Mean Profile Depth (MPD), texture, and angularity before and after polishing cycles. The results showed that the COF in asphalt-based slabs decreased more significantly than in Epoxy-based slabs as polishing cycles increased for HFST and medium gradations. However, in coarse gradation, the COF of slabs using asphalt-based binder matched or even surpassed that of Epoxy after polishing. Notably, the PG88-16 binder for Calcined Bauxite (CB) had the smallest reduction in COF after 140K polishing cycles, with only a 19% decrease compared to a 23% reduction for Epoxy.https://www.mdpi.com/2673-4109/6/1/4high friction surface treatment (HFST)asphalt-based HFSTdynamic friction tester (DFT)aggregate typesize and gradation |
| spellingShingle | Alireza Roshan Magdy Abdelrahman Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments CivilEng high friction surface treatment (HFST) asphalt-based HFST dynamic friction tester (DFT) aggregate type size and gradation |
| title | Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments |
| title_full | Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments |
| title_fullStr | Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments |
| title_full_unstemmed | Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments |
| title_short | Impact of Aggregate Characteristics on Frictional Performance of Asphalt-Based High Friction Surface Treatments |
| title_sort | impact of aggregate characteristics on frictional performance of asphalt based high friction surface treatments |
| topic | high friction surface treatment (HFST) asphalt-based HFST dynamic friction tester (DFT) aggregate type size and gradation |
| url | https://www.mdpi.com/2673-4109/6/1/4 |
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