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干法SBS改性剂的适用性及改性沥青混合料性能研究
作者：苏登信
（南充职业技术学院 土木与建筑工程学院，四川 南充 637000）
摘要：通过研究干法SBS改性剂（SBS-T）掺量对不同油源基质沥青针入度指标体系性能的影响，确定了SBS-T的最佳掺量，进而研究了SBS-T改性沥青混合料的路用性能与疲劳性能。结果表明：随着SBS-T掺量增加，SBS-T改性沥青的高低温性能均明显提高，综合考虑不同SBS-T掺量下改性沥青的延度和弹性恢复率，确定SBS-T的最佳掺量为7%；SBS-T对不同油源基质沥青的改性效果有显著差异，但6种油源7%SBS-T比湿法5%SBS改性沥青有更好的高低温性能，SBS-T适用于不同种类油源的基质沥青；SBS-T改性沥青混合料比湿法5%SBS改性沥青混合料有更优异的高温稳定性和抗疲劳耐久性，路用性能优良。
关键词：干法SBS改性剂；改性沥青混合料；适用性；路用性能
中图分类号：TU535 文献标识码：A 文章编号：1001-702X（2020）11-0084-05
Study on applicability of dry process SBS modifiers and properties of asphalt mixture
SU Dengxin
（School of Civil and Architectural Engineering，Nanchong Vocational and Technical College，Nanchong 637000，China）
Abstract：By studying the influences of dry process SBS modifier（SBS-T） content on penetration index system of matrix as-
phalt with different oil sources，the optimal SBS-T content was determined. Then the road performance and fatigue performance of SBS-T modified asphalt mixture were studied. The results show that with the increase of SBS-T content，the high and low temperature performance of SBS-T modified asphalt is obviously improved. Considering the variation trend of SBS-T modified asphalt ductility and elastic recovery rate under different SBS-T dosages，determine the best SBS-T dosage is 7%. SBS-T has significant difference in the modification effect of different oil source matrix asphalt，but 6 kinds of oil sources with 7% SBS-T have better high and low temperature performance than wet modified asphalt with 5% SBS，SBS-T can be applied to matrix asphalt of different types of oil sources. SBS-T modified asphalt mixture has better high temperature stability and fatigue durability than wet 5% SBS modified asphalt mixture，and the comprehensive road performance is excellent.
Key words：dry process SBS modifier，modified asphalt mixture，applicability，road performance