消石灰和水泥改性沥青混合料的路用性能  

Pavement performance of asphalt mixture modified by hydrated lime and cement

作　　者：李萍[1] 张盼 念腾飞 毛昱[1] LI Ping;ZHANG Pan;NIAN Teng-fei;MAO Yu(College of Civil Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2018年第2期135-138,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51668041);甘肃省科技支撑项目(1504GKCA031)

摘　　要：在沥青混合料中掺加消石灰、水泥能够有效提高沥青与集料之间的黏附性,改善沥青路面路用性能.以连续密级配沥青混合料AC-16型为例,采用冻融劈裂、浸水马歇尔、高温稳定性和低温抗裂性等试验,进行掺加不同剂量消石灰及水泥的路用性能研究.试验结果表明:掺加消石灰的沥青混合料对应的最佳油石比为4.6%,浸水残留稳定度提高9.6%,此时消石灰最佳掺量为1%;掺加水泥的沥青混合料对应的最佳油石比为4.8%,浸水残留稳定度提高7.1%,此时最佳掺量为2%;掺加消石灰和水泥都能显著提高沥青混合料的高、低温稳定性.Adding hydrated lime and cement to asphalt mixture can effectively increase the adhesion between asphalt and aggregate,so that improve road performance of asphalt pavement.Taking the continuous dense-graded asphalt mixture AC-16 as example and using experiment on its high-temperature stability,freeze-thaw splitting,Marshall immersion,and low-temperature crack resistance,the investigation of pavement performance was conducted by means of adding different doses of hydrated lime and cement.Experimental result shows that the optimal ratio of asphalt to lime of the asphalt mixture with additive of hydrated lime will be 4.6%,the soaking remnant stability will increase by 9.6%,and the optimal dosage of the hydrated lime will be 1%.Adding cement to asphalt mixture,the optimum asphalt-to-lime ratio will be 4.8%,the soaking remnant stability will increase by 7.1%,an

关 键 词：沥青混合料 消石灰 水泥 水稳定性 路用性能 

分 类 号：TU502[建筑科学—建筑技术科学] TU535