橡胶/SBS复合改性SMA-13结构参数及路用性能研究  

Structure Parameters and Road Performance of Rubber/SBS Composite Modified SMA-13

作　　者：张惠民 ZHANG Huimin(Jinzhong Branch of Shanxi Provincial Highway Bureau,Jinzhong,Shanxi 030600,China)

机构地区：[1]山西省公路局晋中分局,山西晋中030600

出　　处：《山西交通科技》2024年第5期44-47,53,共5页Shanxi Science & Technology of Transportation

基　　金：山西省交通运输厅科技项目(2020-1-7)。

摘　　要：为全面评价橡胶/SBS复合改性SMA-13的结构参数及路用性能,通过车辙、浸水马歇尔、冻融劈裂、汉堡车辙、小梁弯曲等试验,分析了SMA-13混合料的高温、低温、水稳定性等路用性能,通过单轴压缩试验分析了动态模量。研究表明:橡胶/SBS复合改性SMA-13的动态模量为5764 MPa,可为橡胶/SBS复合改性路面结构设计提供参考依据;汉堡车辙试验加载20000次,橡胶/SBS复合改性SMA-13最大车辙深度为1.55 mm,且未出现剥落点,在水温耦合作用下具有良好的高温稳定性能;小梁弯曲试验中最大弯拉应变远高于现行设计规范要求,表明其具有良好的低温抗裂性能;残留稳定度、冻融劈裂和汉堡车辙试验结果显示橡胶/SBS复合改性SMA-13具有良好的抗水损坏性能。橡胶/SBS复合改性沥青在消纳废胎胶粉的同时,保证了沥青混合料综合使用性能,具有巨大的应用前景。To comprehensively evaluate the structure parameters and road performance of the rubber/SBS composite modified SMA-13,the road performance of the SMA-13 mixture such as high temperature,low temperature,and water stability were analyzed by the rutting test,water immersion Marshall test,freeze-thaw splitting test,and trabecular bending test,and the dynamic modulus was analyzed by uniaxial compression test.The results showed that the dynamic modulus of the rubber/SBS composite modified SMA-13 was 5764MPa,which can provide a basis for the structural design of the rubber/SBS composite modified pavement.After the Hamburg rutting test loading 20000 times,the maximum rutting depth of the rubber/SBS composite modified SMA-13 was 1.55 mm,without a spalling point,showing excellent high-temperature stability under the water temperature coupling action.The maximum bending and tensile strains in the trabecular bending test were much higher than those of the current design specification requirement,which indicated that the rubber/SBS composite modified SMA-13 had good low-temperature cracking resistance.From the results of residual stability,freeze-thaw splitting test,and Hamburg rutting test,the rubber/SBS composite modified SMA-13 had great water damage resistance.The rubber/SBS composite modified asphalt eliminates the waste tire rubber powder,at the same time it ensures the comprehensive use of the asphalt mixtures,with great application prospects.

关 键 词：橡胶/SBS复合改性沥青 SMA-13 动态模量 路用性能 汉堡车辙试验 

分 类 号：U414.75[交通运输工程—道路与铁道工程]