基于CAVF法设计水泥稳定碎石的抗裂性能研究  

Crack Resistance Performance Research of Cement Stabilized Macadam Mixture Based on CAVF Method

作　　者：金龙飞 李传海 冯志鹏 朱颖 JIN Longfei;LI Chuanhai;FENG Zhipeng;ZHU Ying(Shandong Hi-Speed Construction Management Group Co., Ltd., Ji′nan 250014, China;Shandong Hi-Speed Engineering test Co., Ltd., Ji′nan 250002, China;Shandong Hi-Speed Infrastructure Construction Co., Ltd., Ji′nan 250014, China)

机构地区：[1]山东高速建设管理集团有限公司,济南250014 [2]山东高速工程检测有限公司,济南250002 [3]山东高速基础设施建设有限公司,济南250014

出　　处：《交通科技》2022年第3期27-30,35,共5页Transportation Science & Technology

摘　　要：因水泥稳定碎石材料作为沥青路面的半刚性基层存在抗裂性不足的缺陷,为控制水泥稳定碎石的裂缝,文中采用主骨料空隙填充(CAVF)法设计水泥稳定碎石,并与骨架密实型水稳碎石进行对比。试验结果表明,采用CAVF法设计水泥稳定碎石的最大干密度和最佳含水率与设计空隙绝对值成正相关关系,其抵抗变形的能力远优于骨架密实型混合料。CAVF法设计水泥稳定碎石混合料的最大干缩应变值和总干缩系数分别为骨架密实型混合料的58.5%、70.3%;不同温度梯度下的温缩系数均小于骨架密实型水泥稳定碎石混合料,前者的平均温缩系数为后者的61.6%。Cement-stabilized macadam(CSM)material has the defect of cracking as the semi-rigid base of asphalt pavement.In order to control the cracks of the CSM,the CSM was designed by the Course Aggregate Void Filling(CAVF)method,and compared with the skeleton-dense mixtures.The test results show that the maximum dry density and optimum water content of the CSM designed by the CAVF method are positively correlated with the absolute value of the designed voids,and its ability to resist deformation is much better than that of the skeleton-dense mixture.The maximum dry shrinkage strain value and total dry shrinkage coefficient of the CSM designed by CAVF method are 58.5%and 70.3%of the dense-skeleton type mixture,respectively.The temperature shrinkage coefficients under different temperature gradients are all smaller than those of the CSM with dense skeleton,and the average temperature shrinkage coefficient of the former is 61.6%of the latter.

关 键 词：水泥稳定碎石 主骨料空隙填充法 干缩性能 温缩性能 

分 类 号：U414[交通运输工程—道路与铁道工程]