Abstract
Plastic materials are extensively utilized in various aspects of daily life. However, the substantial amount of plastic waste generated can cause significant global environmental issues without efficient waste management practices. To address this problem, the utilization of waste plastics in high-value applications such as highway construction through hot mix asphalt (HMA) has been deemed ideal. Polyethylene terephthalate (PET), low-density polyethylene (LDPE), and high-density polyethylene (HDPE) are the three most prevalent types of plastic waste found in municipal solid waste. The impact of plastic-type and content on the mechanical, volumetric, and durability properties of hot mixed asphalt (HMA) was investigated by utilizing varying plastic contents of PET, LDPE, and HDPE. Tests were conducted in accordance with ASTM standards on twelve HMA mixtures made with an optimal binder content (OBC) of 4.3%, and plastic contents of 3%, 6%, 9%, and 12% by weight of OBC. Marshall stability and flow tests were conducted to ascertain the optimal plastic content for each tested mixture. The findings indicated that the stability and flow values improved as the plastic content was raised. 9% LDPE mix gave a maximum Marshal stability value of 12 kN. Additionally, as the plastic content increased, the values for air voids and voids filled with asphalt decreased in all 12 mixes tested. This research aligns with the United Nations 2030 sustainable development goals (SDGs), including SDGs 9, 11, 12, 13, 14, and 15, and presents a viable method for implementing the 3Rs approach towards sustainable plastic waste management.
Article Highlights
The fundamental engineering properties of different types of plastic waste and the sustainable utilization of plastic waste in the highway industry and environmental conservation are summarized.
The viability of using plastic waste in HMA is evaluated in terms of mechanical performance, volumetric, and durability analysis.
The mixing of plastic can efficiently enhance the performance of HMA related to Marshall properties, rutting resistance, and significantly improve the resistance against moisture exposure.
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Details
1 Dalian University of Technology, Civil Engineering Department, Faculty of Infrastructure, Dalian, China (GRID:grid.30055.33) (ISNI:0000 0000 9247 7930)
2 Dong-A University, Department of ICT Integrated Ocean Smart Cities Engineering, Busan, Republic of Korea (GRID:grid.255166.3) (ISNI:0000 0001 2218 7142)
3 National University of Sciences and Technology, National Institute of Transportation, Risalpur Campus, Pakistan (GRID:grid.412117.0) (ISNI:0000 0001 2234 2376)
4 Dong-A University, Department of ICT Integrated Ocean Smart Cities Engineering, Busan, Republic of Korea (GRID:grid.255166.3) (ISNI:0000 0001 2218 7142); Dong-A University, University Core Research Center for Disaster-Free and Safe Ocean Cities Construction, Busan, Republic of Korea (GRID:grid.255166.3) (ISNI:0000 0001 2218 7142)
5 Lahore College for Women University (LCWU), Department of City and Regional Planning, Lahore, Pakistan (GRID:grid.444924.b) (ISNI:0000 0004 0608 7936)