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为了确定高性能橡胶沥青开普(CAPE)封层中组成材料的最佳用量,并系统研究其路用性能,基于高温抗剪性能设计了正交试验,对CAPE封层中双层碎石封层上下两层的沥青和碎石用量进行优化设计,并分析各因素对其高温性能的影响。在确定其材料最优配比的基础上,围绕高温抗剪性、低温抗裂性、抗疲劳性和抗滑性进行研究。结果表明:第一层碎石用量是影响CAPE封层高温抗剪性能的最主要因素,其次是第二层沥青,之后是第二层碎石,最后是第一层沥青;所确定的材料最佳用量为,第一层碎石12 kg/m2,第二层碎石9 kg/m2,第一层沥青2.0 kg/m2,第二层沥青1.7 kg/m2;高性能橡胶沥青CAPE封层比单层式具有更好的高温、低温和抗疲劳性,与苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene-butadiene-styrene block copolymer, SBS)改性沥青混合料相比,低温和抗疲劳性也有提升;另外CAPE封层具有良好的抗滑性。因而,高性能橡胶沥青CAPE封层适用于高等级公路养护工程和对路面有较高要求的新建道路中。
Abstract：In order to determine the optimal amount of the constituent materials in the high-performance rubber asphalt CAPE seal coat and systematically study its road performance, based on the high-temperature shear performance, the orthogonal test was designed to optimize the amount of asphalt and gravel in the upper and lower layers of the double gravel seal coat, and the influence of various factors on its high-temperature performance was analyzed. On the basis of determining the optimal composition of its materials, research was conducted on high-temperature shear resistance, low-temperature crack resistance, fatigue resistance and skid resistance. The results show that the content of the first layer of gravel is the most important factor affecting the high-temperature shear resistance of the CAPE seal, followed by the second layer of asphalt, then the second layer of gravel, and the last is the first layer of asphalt; the optimal material content was as follows: 12 kg/m2 for the first layer of gravel, 9 kg/m2 for the second layer of gravel, 2.0 kg/m2 for the first layer of asphalt, and 1.7 kg/m2 for the second layer of asphalt; high-performance asphalt rubber CAPE seal has better high and low-temperature performance as well as fatigue resistance than single layer type. Compared with styrene-butadiene-styrene block copolymer(SBS) modified asphalt mixture, low-temperature performance and fatigue resistance were also improved; in addition, CAPE seal layer has good skid resistance. Therefore, the high-performance asphalt rubber CAPE seal is suitable for high-grade highway maintenance engineering and new roads with higher requirements for pavement.
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基本信息:
中图分类号:U414
引用信息:
[1]姚爱玲,曹昊楠,焦山锁,等.高性能橡胶沥青CAPE封层设计及路用性能[J].中国科技论文,2021,16(04):430-436.
基金信息:
浙江省公路局科技项目(2016-2-25)
2021-05-26
2021-05-26
2021-05-26