摘要
为评价不同方法设计的沥青混合料路用性能,通过室内马歇尔试验、劈裂试验、单轴贯入试验、车辙试验、小梁弯曲试验及劈裂疲劳试验等对垂直振动成型法(VVTM)和马歇尔法(Marshall)设计的SMA沥青混合料路用性能进行了分析与评价。结果表明:1)VVTM法设计的SMA沥青混合料密度约为Marshall的1.02倍,最佳油石比约降低7%;2)与Marshall设计法相比,VVTM法沥青混合料的马歇尔稳定度、抗剪强度、动稳定度、低温劈裂强度至少可提升30%,疲劳性能和水稳定性均有提升,但抗弯拉强度略有降低;3)强嵌挤骨架密实级配(GM)可有效提升SMA沥青混合料路用性能。结论是VVTM法设计的SMA沥青混合料较Marshall法设计的有更好的路用性能。
In order to evaluate the road performance of asphalt mixtures designed by different methods,the Marshall,splitting,uniaxial penetration,rut,trabecular bending,and splitting fatigue tests were used to evaluate the road performance of SMA mixture designed via the vertical vibration method(VVTM)and Marshall method(Marshall).The results show that the density of SMA asphalt mixture designed using VVTM method is about 1.02 times that of the Marshall design method,the best asphalt-aggregate ratio is reduced for about 7%.Compared with Marshall design method,the Marshall stability,shear strength,dynamic stability and low temperature splitting strength of asphalt mixture designed by VVTM method can be increased by at least 30%,the fatigue performance and water stability are improved as well,but the tensile strength was lowered.The strong embedded frame compact gradation can effectively improve the road performance of SMA asphalt mixture.The conclusion is that the SMA asphalt mixture designed by the VVTM method has better road performance than that of the Marshall method.
作者
蒋应军
张勇
张大强
张继
王富玉
JIANG Yingjun;ZHANG Yong;ZHANG Daqiang;ZHANG Ji;WANG Fuyu(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an,710064,China;Jilin Province Expressway Group Co.,Ltd.,Changchun,130033,China;Transportation College,Jilin University,Changchun,130012,China)
出处
《公路交通技术》
2020年第3期31-36,共6页
Technology of Highway and Transport
基金
吉林省交通运输科技计划项目(2017ZDGC-7)。
关键词
道路工程
沥青混合料
垂直振动成型方法
马歇尔方法
路用性能
road engineering
asphalt mixture
vertical vibration testing method
Marshall method
road performance
