In order to improve the low temperature road performance of styrene butadiene styrene(SBS) modified asphalt in cold regions, two modified asphalts were prepared using different plasticizer: dioctyl phthalate (DOP) and dioctyl adipate (DOA) basing on SBS modified asphalt..The low temperature performance of asphalt before and after aging was tested by bending beam rheometer (BBR),and the low temperature continuous grading temperature (TLC) and relaxation time (λ) were introduced to evaluate the low temperature performance of SBS modified asphalt with plasticizer. The performance evaluation and modification mechanism of asphalt with plasticizer was analyzed by fourier transform infrared spectroscopy (FTIR).The trial results show the plasticizer could significantly reduce the creep stiffness and increase creep rate of SBS modified asphalt, and the improvement effect had increased with the increase of plasticizer content. The performance difference of SBS modified asphalt before and after aging is obviously reduces by adding plasticizer. The dioctyl adipate plasticizer DOA had the best effect on improving low temperature performance and the dioctyl phthalater plasticizer DOP had the best anti-aging effect of SBS modified asphalt in the same dosage condition. The low temperature performance of SBS modified asphalt with plasticizer had well discriminated by index of low temperature continuous grading temperature (TLC) and relaxation time (λ). The mechanism of plasticizer on low temperature and anti-aging properties of SBS modified asphalt was studied by FTIR.
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王枫成. 增塑剂对苯乙烯-丁二烯-苯乙烯改性沥青低温性能的影响[J]. 科学技术与工程, 2022, 22(5): 2002-2008. Wang Fengcheng. Study on influence of plasticizer on low temperature performance of SBS modified asphalt[J]. Science Technology and Engineering,2022,22(5):2002-2008.