The Use of Polyethylene and Polypropylene Plastic Waste as Partial Replacement of Fine Aggregate in Asphalt Concrete Pavement Design
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Abstract
This research studied the use of polyethylene and polypropylene plastic waste as a partial replacement of fine aggregate in asphalt concrete pavement design, in which one limestone aggregate source was used. The two types of Plastic Waste (PW) mixed with Polyethylene (PE) and Polypropylene (PP) percentage equal to 70 : 30. There are 2 groups of mixtures : the first group was Asphalt Concrete mix (AC), the mix proportion of hot bin 1 : 2 : 3 : 4 was 48 : 14 : 20 : 18 by mass of aggregate and the second group was a mixture of Plastic Waste Asphalt Concrete mix (PWAC) , the mixing proportion of hot bin PW : 1 : 2 : 3 : 4 was 0.3 : 47.7 : 14 : 20 : 18 by mass of aggregate and using the amount of asphalt cement grade AC 60–70 equal to 5 . 0 percent by mass of aggregate both in the laboratory and field. The specimens were prepared using dry process and Marshall method and the 12. 5 mm wearing course criteria by testing their properties for density, stability, flow, air voids, voids in mineral aggregate, voids filled with bitumen and strength index. The test results showed that the mechanical properties of Asphalt Concrete mix (AC) and Plastic Waste Asphalt Concrete mix comply with the standards of Thailand Department of Highways.
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