γ辐照对回收LDPE改性沥青蠕变恢复特性的影响

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摘要 To improve the performance of recycled low-density polyethylene (LDPE_R), this paper describes the polymer modification of bitumen with gamma-irradiated recycled low-density polyethylene (γ-LDPE_R). 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 LDPE_R 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-LDPE_R, the modified asphalt rutting resistance also increased. However, due to the high γ-LDPE_R content of the modified asphalt, undertaking the high-temperature performance evaluation of the applicability of MSCR deserves further study.

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	王文奇
	丁海波
	王泽

关键词 ： road engineering, modified asphalt, γ-irradiation, recycled low-density polyethylene, performance enhancing

Abstract：To improve the performance of recycled low-density polyethylene (LDPE_R), this paper describes the polymer modification of bitumen with gamma-irradiated recycled low-density polyethylene (γ-LDPE_R). 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 LDPE_R 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-LDPE_R, the modified asphalt rutting resistance also increased. However, due to the high γ-LDPE_R content of the modified asphalt, undertaking the high-temperature performance evaluation of the applicability of MSCR deserves further study.

Key words： road engineering modified asphalt γ-irradiation recycled low-density polyethylene performance enhancing

收稿日期: 2016-09-21

基金资助: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)

通讯作者: WANG Wen-qi E-mail: wwq1999@126.com

引用本文:

王文奇, 丁海波, 王泽. γ辐照对回收LDPE改性沥青蠕变恢复特性的影响[J]. Journal of Highway and Transportation Research and Development, 2018, 12(1): 13-18.
WANG Wen-qi, DING Hai-bo, WANG Ze. Effects of Gamma-Irradiated Recycled Low-Density Polyethylene on the Creep and Recovery Properties of Asphalt. Journal of Highway and Transportation Research and Development, 2018, 12(1): 13-18.

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