IMPROVEMENT OF ASPHALT CONCRETE PROPERTIES USING HDPE, PP, AND PET PLASTIC WASTES VIA MARSHALL MIX DESIGN BASED ON THAILAND'S PAVEMENT DESIGN

Authors

  • Phichayet Marasri Pibulsongkram Rajabhat University
  • Pariwat Manthong Pibulsongkram Rajabhat University
  • Panuwat Tunkeaw Pibulsongkram Rajabhat University
  • Sasiprapha Waiyawut Pibulsongkram Rajabhat University
  • Wannika Kancomnanta Pibulsongkram Rajabhat University

Keywords:

Asphalt concrete, Marshall mix design, Pavement durability, Recycled plastic waste

Abstract

     This study aimed to investigate the use of recycled plastic waste as an additive in asphalt concrete mixtures. Three types of plastic waste were examined: high-density polyethylene (HDPE) obtained from packaging bottles and garbage bags, polypropylene (PP) obtained from plastic containers and agricultural drip irrigation tubing, and polyethylene terephthalate (PET) obtained from drinking water bottles. The novelty of this study lies in its comparison of the performance of these three plastic types under identical experimental conditions, whereas most previous studies have focused on only one type of plastic. The mixtures were designed using the Marshall method in accordance with the Department of Highways Standard No. DOH-M. 408/2532. Limestone aggregate from Sukhothai Province and AC 60/70 penetration-grade asphalt cement were used, with an aggregate blend ratio of 50:25:13:12. The optimum asphalt content was determined to be 4.8% by weight of the aggregate. Plastic waste with particle sizes ranging from 2 to 4 mm was then incorporated at dosages of 1% and 3% by weight of the asphalt cement. Marshall stability, flow, and air voids were evaluated. The results indicated that the mixtures containing 3% plastic exhibited substantially higher Marshall stability than both the control mixtures and those containing 1% plastic, particularly in the HDPE- and PP-modified mixtures. Meanwhile, the flow values of these mixtures decreased as the plastic content increased. The air void contents of all mixtures remained within the specified range of 3.7–4.4%. Overall, the plastic-modified mixtures demonstrated the potential to provide greater strength and durability than conventional asphalt concrete while partially reducing asphalt cement consumption. These findings demonstrate the potential of utilizing plastic waste in pavement applications as a sustainable approach to resource management.

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Published

2026-08-31

How to Cite

[1]
P. Marasri, P. Manthong, P. Tunkeaw, S. Waiyawut, and W. Kancomnanta, “IMPROVEMENT OF ASPHALT CONCRETE PROPERTIES USING HDPE, PP, AND PET PLASTIC WASTES VIA MARSHALL MIX DESIGN BASED ON THAILAND’S PAVEMENT DESIGN”, PSRU JITE, vol. 8, no. 2, pp. 221–235, Aug. 2026.