Li Erda, Xu Wenyuan, Zhang Yang
College of Civil Engineering, Northeast Forestry University, Harbin 150040, China.
Heilongjiang Provincial Transportation Investment Group, Harbin 150036, China.
Polymers (Basel). 2023 Jul 27;15(15):3200. doi: 10.3390/polym15153200.
In this work, waste polyethylene (PE)-modified 90# asphalt was made in order to investigate the performance of waste polyethylene-modified high-grade asphalt and the optimal blending quantity. Dynamic Shear Rheology (DSR) and Bending Beam Rheometer (BBR) tests were used to evaluate the high- and low-temperature performance of modified 90# PE-modified asphalt. Infrared spectroscopy and fluorescence microscopy were used to investigate the modification process and distribution status of waste PE in 90# asphalt. The DSR and BBR tests revealed that waste PE enhanced the high-temperature performance of 90# base asphalt and that 5% was the best blending rate. However, the change affects asphalt's low-temperature performance, and the negative effect on asphalt's low-temperature performance was minimized at 1% dosing. The incorporation of waste PE absorbed the light components of asphalt, while waste PE can form a reticulated structure in asphalt, which improves its high-temperature performance but degrades its low-temperature performance, according to the results of infrared spectroscopy and fluorescence microscopy.
在本研究中，制备了废旧聚乙烯（PE）改性90#沥青，以研究废旧聚乙烯改性高等级沥青的性能及最佳掺量。采用动态剪切流变仪（DSR）和弯曲梁流变仪（BBR）试验来评价改性90# PE改性沥青的高低温性能。利用红外光谱和荧光显微镜研究废旧PE在90#沥青中的改性过程及分布状态。DSR和BBR试验表明，废旧PE提高了90#基质沥青的高温性能，最佳掺量为5%。然而，这种变化会影响沥青的低温性能，在掺量为1%时对沥青低温性能的负面影响最小。红外光谱和荧光显微镜的结果表明，废旧PE的掺入吸收了沥青中的轻质组分，同时废旧PE能在沥青中形成网状结构，提高了其高温性能，但降低了其低温性能。
