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主要针对SBS改性沥青在使用中出现的高温易软化、低温易龟裂等问题,采用试验和理论分析的方法,研究了单一无机辅助改性剂、单一有机辅助改性剂及二者复合的辅助改性剂对SBS改性沥青性能的影响。试验结果表明:加入无机辅助改性剂后,改性沥青的高温性能得到改善,SBS改性沥青的软化点提高了48.01%;有机辅助改性剂使改性沥青的高低温性能都能很好地改善,特别是低温性能,其中SBS改性沥青的延度(5℃)提高了188.46%,软化点提高了39.40%;复合辅助改性剂虽然对改性沥青的高低温性能有所改善,但存在一定局限,SBS改性沥青延度(5℃)提高了57.69%,软化点却降低了4.64%。因此,选择有机化合物作为辅助改性剂,能更好地改善SBS改性沥青的高低温性能。
Mainly for SBS modified asphalt in the use of high temperature easy to soften, low temperature easy to crack and other issues, the use of experimental and theoretical analysis of the method of single inorganic auxiliary modifier, a single organic auxiliary modifier and the two complex Effect of Auxiliary Modifiers on Properties of SBS Modified Asphalt. The experimental results show that the high temperature performance of modified asphalt is improved with the addition of inorganic assistant modifier, the softening point of SBS modified asphalt is increased by 48.01%, and the organic assistant modifier can make the high and low temperature performance of modified asphalt well (5 ℃) of SBS modified asphalt increased by 188.46% and the softening point increased by 39.40%. Although the composite auxiliary modifier improved the high and low temperature performance of modified asphalt, But there are some limitations, SBS modified asphalt ductility (5 ℃) increased 57.69%, softening point but decreased 4.64%. Therefore, the choice of organic compounds as a secondary modifier, can better improve the high and low temperature performance of SBS modified asphalt.