| Title | Dry Addition of Recycled Waste Polyethylene in Asphalt Mixtures: A Laboratory Study |
|---|---|
| ID_Doc | 7618 |
| Authors | Pasetto, M; Baliello, A; Pasquini, E; Poulikakos, L |
| Title | Dry Addition of Recycled Waste Polyethylene in Asphalt Mixtures: A Laboratory Study |
| Year | 2022 |
| Published | Materials, 15, 14 |
| Abstract | The circular use of resources (i.e., reuse and recycling of materials) aiming for zero waste is also gaining increasing attention in pavement engineering. In this regard, the possible use of waste plastics in asphalt materials is of strategic importance since a considerable amount of plastic waste from construction and demolition waste and municipal solid waste is generated every year. Given this background, this experimental study aimed to investigate the feasibility of recycling waste polyethylene (PE) into asphalt mixtures. For this purpose, the dry addition of plastic shreds was evaluated to overcome the drawbacks observed in a previous interlaboratory research on PE-modified bituminous binder (i.e., instability/inhomogeneity of blend as well as the need for PE grinding). A comparative laboratory study was carried out on dense graded asphalt mixtures containing different amounts of waste plastics (i.e., 0%, 0.25%, and 1.5% by weight of the mixture). The selected asphalt mixes were investigated in terms of workability, linear visco-elastic characteristics, stiffness, strength, resistance to permanent deformation, and moisture sensitivity. Overall, the experimental findings show that the mixes prepared with the dry addition of plastic wastes were able to guarantee almost the same workability and moisture resistance as the reference material while leading to enhanced performance in terms of stiffness and permanent deformation resistance, with better responses for the higher investigated PE dosage. |
| https://www.mdpi.com/1996-1944/15/14/4739/pdf?version=1657173119 |
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