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An Investigation on the Mix Design of Double Layer Porous Asphalts | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 4، دوره 11، شماره 4 - شماره پیاپی 32، بهمن 2023، صفحه 65-76 اصل مقاله (1.22 M) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2023.27877.1684 | ||
| نویسندگان | ||
| Babak Golchin1؛ Noor Halizah Abdullah* 2؛ Meor Othman Hamzah3؛ Jan Valentin4 | ||
| 1Department of Civil Engineering, University of Mohaghegh Ardabili, Ardabil, Iran | ||
| 2School of Housing, Building, and Planning, Universiti Sains Malaysia, Penang, Malaysia | ||
| 3School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia,14300 Nibong Tebal, Seberang Perai Selatan, Penang, Malaysia | ||
| 4Department of Road Structures, Czech Technical University, Prague, Czech Republic | ||
| تاریخ دریافت: 31 تیر 1401، تاریخ بازنگری: 17 بهمن 1401، تاریخ پذیرش: 06 فروردین 1402 | ||
| چکیده | ||
| Porous asphalt (PA) are used to drain water from the surface of the asphalt pavements. It reduces aquaplaning and subsequently decreases splash and spray. Clogging reduces the permeability of PA over the years. The double layer PA are used to mitigate this problem. Different aggregate gradations and binder types can alter the performance of double layer PA. The objective of this research is to evaluate the effects of these parameters on the performance of double layer PA. For this purpose, different samples were fabricated using various aggregate gradations based on Malaysian asphalt mixture standards. Indirect tensile strength, permeability and air voids of the samples were determined. The proposed aggregate gradation for top and bottom layers were mixed with two different asphalt binders. Cantabro and binder drainage tests were later carried out on these samples. The results were then compared with the corresponding results from the Dutch double layer PA gradations. Laboratory test results showed that aggregate gradation significantly affect the indirect tensile strength, permeability and air voids of both top and bottom layer of PA. The design binder content for the bottom layer is also lower than that for the top layer. However, the binder type did not significantly change the design binder content. | ||
| کلیدواژه‌ها | ||
| Porous asphalt؛ Gradation؛ Binder drainage؛ Cantabro test؛ ITS | ||
| مراجع | ||
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