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| Effects of Gamma-Irradiated Recycled Low-Density Polyethylene on the Creep and Recovery Properties of Asphalt |
| WANG Wen-qi1,2,3, DING Hai-bo1,3, WANG Ze2 |
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. School of Architecture and Civil Engineering Institute, Xihua University, Chengdu Sichuan 610039, China;
3. Key Laboratory of Road Engineering of Sichuan Province, Chengdu Sichuan 610031, China |
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Abstract To improve the performance of recycled low-density polyethylene (LDPER), this paper describes the polymer modification of bitumen with gamma-irradiated recycled low-density polyethylene (γ-LDPER). The effects of the γ-LDPE R on bitumen were investigated by means of morphological and chemical analyses, including Fourier-transform infrared spectroscopy and multiple stress creep recovery (MSCR) test. The results showed that the surface of the LDPER treated by gamma beam irradiation led to the formation of free radicals and some functional groups that may contribute to the creation of strong chemical bonds between the polymer modifier and bitumen, thus improving the compatibility of the modified asphalt. With the increased use of γ-LDPER, the modified asphalt rutting resistance also increased. However, due to the high γ-LDPER content of the modified asphalt, undertaking the high-temperature performance evaluation of the applicability of MSCR deserves further study.
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Received: 21 September 2016
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| Fund:Supported by Sichuan Provincial Department of Education Project(No.16ZB0164);the Open Research Fund of Key Laboratory of Road Engineering(No.15206569); and the Open Project of Green Building and Energy Conservation Province Key Laboratory Fund(No.szjj2015-074) |
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Corresponding Authors:
WANG Wen-qi
E-mail: wwq1999@126.com
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2018, Vol. 12 
