TY - JOUR
T1 - Sustainable Practice in Pavement Engineering through Value-Added Collective Recycling of Waste Plastic and Waste Tyre Rubber
AU - Xu, Xiong
AU - Leng, Zhen
AU - Lan, Jingting
AU - Wang, Wei
AU - Yu, Jiangmiao
AU - Bai, Yawei
AU - Sreeram, Anand
AU - Hu, Jing
N1 - Funding Information:
The authors would like to acknowledge the funding support from the Hong Kong Environment and Conservation Fund through ECF Project (84/2017) and Science and Technology Project of Henan Provincial Department of Transportation ( 2020J6 ).
Funding Information:
The authors would like to acknowledge the funding support from the Hong Kong Environment and Conservation Fund through ECF Project (84/2017) and Science and Technology Project of Henan Provincial Department of Transportation (2020J6). Xiong Xu, Zhen Leng, Jingting Lan, Wei Wang, Jiangmiao Yu, Yawei Bai, Anand Sreeram, and Jing Hu declare that they have no conflict of interest or financial conflicts to disclose.
Publisher Copyright:
© 2021 Chinese Academy of Engineering
PY - 2021/6
Y1 - 2021/6
N2 - Waste plastics, such as waste polyethylene terephthalate (PET) beverage bottles and waste rubber tyres are major municipal solid wastes, which may lead to various environmental problems if they are not appropriately recycled. In this study, the feasibility of collectively recycling the two types of waste into performance-increasing modifiers for asphalt pavements was analyzed. This study aimed to investigate the recycling mechanisms of waste PET-derived additives under the treatment of two amines, triethylenetetramine (TETA) and ethanolamine (EA), and characterize the performances of these additives in modifying rubberized bitumen, a bitumen modified by waste tyre rubber. To this end, infrared spectroscopy and thermal analyses were carried out on the two PET-derived additives (PET–TETA and PET–EA). In addition, infrared spectroscopy, viscosity, dynamic shear rheology, and multiple stress creep recovery tests were performed on the rubberized bitumen samples modified by the two PET-derived additives. We concluded that waste PET can be chemically upcycled into functional additives, which can increase the overall performance of the rubberized bitumen. The recycling method developed in this study not only helps alleviate the landfilling problems of both waste PET plastic and scrap tyres, but also turns these wastes into value-added new materials for building durable pavements.
AB - Waste plastics, such as waste polyethylene terephthalate (PET) beverage bottles and waste rubber tyres are major municipal solid wastes, which may lead to various environmental problems if they are not appropriately recycled. In this study, the feasibility of collectively recycling the two types of waste into performance-increasing modifiers for asphalt pavements was analyzed. This study aimed to investigate the recycling mechanisms of waste PET-derived additives under the treatment of two amines, triethylenetetramine (TETA) and ethanolamine (EA), and characterize the performances of these additives in modifying rubberized bitumen, a bitumen modified by waste tyre rubber. To this end, infrared spectroscopy and thermal analyses were carried out on the two PET-derived additives (PET–TETA and PET–EA). In addition, infrared spectroscopy, viscosity, dynamic shear rheology, and multiple stress creep recovery tests were performed on the rubberized bitumen samples modified by the two PET-derived additives. We concluded that waste PET can be chemically upcycled into functional additives, which can increase the overall performance of the rubberized bitumen. The recycling method developed in this study not only helps alleviate the landfilling problems of both waste PET plastic and scrap tyres, but also turns these wastes into value-added new materials for building durable pavements.
KW - Recycling mechanism
KW - Rubberized bitumen
KW - Sustainability
KW - Waste polyethylene terephthalate
KW - Waste tyre rubber
UR - http://www.scopus.com/inward/record.url?scp=85107734649&partnerID=8YFLogxK
U2 - 10.1016/j.eng.2020.08.020
DO - 10.1016/j.eng.2020.08.020
M3 - Journal article
AN - SCOPUS:85107734649
SN - 2095-8099
VL - 7
SP - 857
EP - 867
JO - Engineering
JF - Engineering
IS - 6
ER -
