Study on Performance of Wax Warm Mix Asphalt Cracked by Mixed Polyethylene Waste Plastics

Zhimei  Wang; Yan  Li; Wei  Zhang; Daojun  Zhang; Shubin  Liu; Shaosong  Shi; Chuanqiang  Li

doi:10.36922/ssr.v3i4.1217

Zhimei Wang 1School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China 2Chongqing TONGLI Expressway Maintenance Engineering Co., Ltd., Chongqing 400039, China
Yan Li Chongqing TONGLI Expressway Maintenance Engineering Co., Ltd., Chongqing 400039, China
Wei Zhang Chongqing TONGLI Expressway Maintenance Engineering Co., Ltd., Chongqing 400039, China
Daojun Zhang Chongqing TONGLI Expressway Maintenance Engineering Co., Ltd., Chongqing 400039, China
Shubin Liu School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Shaosong Shi School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Chuanqiang Li School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

DOI: https://doi.org/10.36922/ssr.v3i4.1217

Keywords: Zeolite, Ni catalyst, Waste polyethylene, Pyrolysis, PE wax

Abstract

In order to study the modified performance of polyethylene waste plastic cracking wax on asphalt, this paper prepared polyethylene wax (PE wax) by catalytic cracking using waste polyethylene as raw material and Ni-based zeolite as catalyst in a pressure reactor under closed conditions. 70# base asphalt was modified with PE wax, and the properties of pyrolysis wax on asphalt under different catalytic cracking time were studied by three indexes test, Brinoll rotary viscosity test, DSC test and dynamic shear rheology test. The test results show that the cracking products of mixed polyethylene waste plastic cracking wax have good viscosity reduction effect on asphalt under different cracking time. After modification, the high temperature performance of asphalt is improved, and the low temperature performance has a certain influence, but it still meets the specification requirements; In the temperature range of 0°C~60°C, the addition of pyrolysis wax can make the phase transformation of matr-ix asphalt more stable.