为研究生物油及苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性剂对石油沥青的影响,通过正交设计试验进行生物油/SBS改性沥青的制备,并通过常规物理性能、MSCR及弯曲梁流变实验,对比分析改性沥青与基质沥青、SBS改性沥青的各项路用性能的差异。常规物理性能研究表明,生物油/SBS改性沥青相比基质沥青,延度增加,针入度和软化点降低;相比SBS改性沥青,针入度和延度增加,软化点降低。MSCR实验结果表明,生物油/SBS改性沥青高温抗车辙能力稍微差于SBS改性沥青,但仍明显优于基质沥青。弯曲梁流变实验结果表明,生物油/SBS改性沥青优于基质沥青和SBS改性沥青。因此,通过与基质沥青性能对比可知,生物油/SBS改性沥青具有较好的适用性。
In order to study the influence of bio-oil and SBS modifier on base asphalt,the preparation of bio-oil/SBS modified asphalt was carried out through orthogonal design test.The pavement performance differences of base asphalt and SBS modified asphalt were compared and analyzed through routine physical performance test,MSCR test and bending beam rheological test.Conventional physical properties research shown that the ductility of bio-oil/SBS modified asphalt was increased,penetration and softening point decreased compared with base asphalt.The penetration and ductility of bio-oil/SBS asphalt increased and softening point decreased compared with SBS modified asphalt.MSCR test results shown that the rutting resistance of bio-oil/SBS modified asphalt at high temperature was slightly worse than that of SBS modified asphalt,but it was still significantly better than that of base asphalt.The rheological test results of bending beams shown that the bio-oil/SBS modified asphalt was superior to the base asphalt and SBS modified asphalt.Therefore,compared with the performance of base asphalt,bio-oil/SBS modified asphalt had better applicability.
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基金资助
重庆市教育委员会科学技术研究项目(KJZD-M201900701);重庆交通大学研究生教育创新基金项目(2018S0109)
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