耐高温密级配AC型沥青混合料技术研究  

Research on High Temperature AC-type Dense-graded Asphalt Mixtures Technology

作　　者：张剑金 ZHANG Jianjin(Xiamen Municipal Engineering Research Co.,Ltd.)

机构地区：[1]厦门市政工程研究所有限公司

出　　处：《广东建材》2024年第4期35-38,共4页Guangdong Building Materials

摘　　要：为探究提升密级配AC型沥青混合料耐高温性能的方法,从基质沥青的复合改性及沥青混合料矿料空间结构的优化方面进行试验研究。研究得出,采用SBS改性剂和抗车辙剂对沥青复合改性能有效提升沥青耐高温性能。改性剂最优掺量为2%SBS改性剂加6%抗车辙剂。在规范允许级配范围内,将AC型沥青混合料矿料的空间结构从悬浮密实往骨架密实结构靠拢,能有效提升沥青混合料的耐高温性能,其中需重点控制4.75mm骨架分界筛孔通过率。To explore methods for improving the high-temperature resistance of AC-type dense-graded asphalt mixtures.Experimental research was conducted on the composite modification of matrix asphalt and the optimization of the spatial structure of asphalt mixture aggregates.It is shown that the use of SBS modifier and Anti-rut agent effectively enhances the high-temperature resistance of asphalt through composite modification.The optimal dosage of modifier is 2%SBS modifier and 6%Anti rut agent.Within the allowable grading range of the specifications,the spatial structure of AC type asphalt mixture mineral aggregate can be effectively improved by moving it from suspension density to skeleton density structure,which can effectively enhance the high-temperature resistance performance of asphalt mixture.Among them,it is necessary to focus on controlling the pass rate of 4.75mm skel‐eton boundary sieve holes.

关 键 词：复合改性沥青 抗车辙剂 矿料级配 高温性能 

分 类 号：U414[交通运输工程—道路与铁道工程]