高模量沥青混合料设计及路用性能对比研究  

Comparative study on design and road performance of high modulus asphalt mixture

作　　者：裴婷婷 Pei Tingting(Xi’an Urban Investment Construction Company,Xi’an Shaanxi 710000,China)

机构地区：[1]西安城投建设公司,陕西西安710000

出　　处：《山西建筑》2024年第24期122-125,133,共5页Shanxi Architecture

摘　　要：为研究不同集料的高模量沥青混合料路用性能,基于幸福路北延伸段改造工程,设计了全石灰岩、全钢渣及50%石灰岩及钢渣三种沥青混合料,采用室内试验检验性能,并成功应用于实体试验段,得出主要结论:全石灰岩沥青混合料的车辙深度最大为1.79 mm,加入钢渣后抵抗变形能力增强,车辙深度降低,且动稳定度也有所提高。全钢渣沥青混合料的动稳定度最高为8 900次/mm,相较于全石灰岩的沥青混合料提高了268%,抵抗累计变形次数为15 643次,疲劳次数为2 438 998次,抗疲劳性能和高温稳定性能均最佳;全钢渣的沥青混合料劲度模量最小为3 717 MPa,冻融强度比最高为95.61%,且体积膨胀率在浸水初期较小,后期较大。综合考虑沥青混合料的路用性能并结合经济效益,全钢渣沥青混合料经济性和路用性能优越,路面试用效果理想,综合性价比最高,可为高模量沥青混合料设计提供参考。In order to study the road performance of high modulus asphalt mixtures with different aggregates,this paper designs three types of asphalt mixtures based on the renovation project of the north extension of Xingfu Road:all limestone,all steel slag,and 50%limestone and steel slag.The performance is tested in indoor experiments and successfully applied to the actual test section.The main conclusion is as follows:the maximum rut depth of all limestone asphalt mixture is 1.79 mm.After adding steel slag,the resistance to deformation is enhanced,the rut depth is reduced,and the dynamic stability is also improved.The maximum dynamic stability of the all steel slag asphalt mixture is 8900 times/mm,which is 268%higher than that of the all limestone asphalt mixture.It has a cumulative deformation resistance of 15643 times and a fatigue resistance of 2438998 times,with the best fatigue resistance and high-temperature stability;The minimum stiffness modulus of asphalt mixture made entirely of steel slag is 3717 MPa,the highest freeze-thaw strength ratio is 95.61%,and the volume expansion rate is relatively small in the early stage of immersion and relatively large in the later stage.Taking into account the road performance of asphalt mixture and economic benefits,the all steel slag asphalt mixture has excellent economic and road performance,ideal pavement trial effect,and the highest comprehensive cost-effectiveness,which can provide reference for the design of high modulus asphalt mixture.

关 键 词：路基工程 沥青混合料 路用性能 材料性能 

分 类 号：TU997[建筑科学—市政工程] U416.217[交通运输工程—道路与铁道工程]