添加剂对高模量沥青及其混合料性能的影响

Effects of High Modulus Asphalt and its Mixture on its Performance

为了给沥青路面推荐较优高模量沥青混合料添加材料,采用车辙试验、冻融劈裂试验和小梁弯曲试验,以试件的最大变形、冻融劈裂强度比(TSR)和疲劳寿命为评价指标,对比研究了苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)和聚乙烯(PE)两种添加材料,在不同添加剂量条件下对比沥青混合料的性能作用效果。根据研究结果在夏季高温地区,建议采用添加剂量为4.0%的聚合物SBS;在夏季多雨地区或者交通量繁重路段,建议聚合物SBS和聚乙烯PE混合使用,并且掺量为3%。

In order to provide asphalt mixture to the asphalt mixture material,this paper adopted the rutting test,freeze-thaw splitting test and trabecular bending test,By taking the maximum deformation,TSR and fatigue life of the specimen as the evaluation index,to compare the effects of the Styrene-butadiene-styrene block copolymer（SBS） and the polyethylene（PE） on the performance of the asphalt mixture under different additive dosages. The results showed that the deformation amount and TSR growth rate of the specimen are the maximum at the dosage of4. 0%,the high modulus asphalt mixture with polymer SBS is added. In the high temperature area of summer,it is recommended to use the additive SBS with a dosage of 4. 0%. It is recommended that the polymer SBS and polyethylene PE be used in a rainy area or in heavy traffic,and the content is 3%.