橡胶沥青砂浆与混合料复合模量的关联性  

Correlation of Composite Moduli between Rubber Asphalt Mortar and Mixture

作　　者：王新强 王国清 秦禄生 王庆凯[4,5] 高占华 WANG Xin-qiang;WANG Guo-qing;QIN Lu-sheng;WANG Qing-kai;GAO Zhan-hua(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300400,China;Hebei Shijiazhuang-Qingyin Expressway Co.,Ltd.,Shijiazhuang Hebei 050051,China;Hebei Transportation Investment Group Corporation,Shijiazhuang Hebei 050091,China;Hebei Provincial Communications Planning and Design Institute,Shijiazhuang Hebe 050091,China;R&D Center for Highway Construction and Maintenance Technology,Materials and equipment,Shijiazhuang Hebei 050091,China)

机构地区：[1]河北工业大学土木与交通学院,天津300400 [2]河北石青高速公路有限公司,河北石家庄050051 [3]河北交通投资集团公司,河北石家庄050091 [4]河北省交通规划设计院,河北石家庄050091 [5]公路建设与养护技术、材料及装备交通运输行业研发中心,河北石家庄050091

出　　处：《公路交通科技》2020年第1期10-16,共7页Journal of Highway and Transportation Research and Development

基　　金：河北省科技计划项目(16211247)

摘　　要：为探究橡胶沥青砂浆与混合料复合模量的关联性,从橡胶沥青砂浆角度预测了混合料的动态模量。首先将粗集料、沥青砂浆作为独立的两个单元,确定了橡胶沥青砂浆级配。然后采用PCG旋转压实法测定了各档粗集料的骨架间隙率,选取最小骨架间隙率作为确定粗集料各档比例和衡量沥青砂浆用量的尺度,设计混合料的空隙率为4%。通过集料的比表面积和沥青膜厚计算了沥青用量,完成了沥青混合料设计。分别按骨架最小间隙体积的85%,95%,100%和110%填充沥青砂浆,采用PCG旋转压实法成型沥青混合料试件,在沥青混合料性能试验仪上测定了混合料的复合模量。采用静压成型法制备沥青砂浆试件,测量了其复合模量。结果表明:沥青砂浆和混合料的复合模量满足幂函数关系,具有极高的相关性,沥青砂浆的动态模量最小,相位角最大;在相同条件下,混合料的动态模量随着沥青砂浆填充率的增加呈增大趋势,相位角无较大差别;根据沥青砂浆和沥青混合料的动态模量数据,采用西格摩德数学模型拟合动态模量主曲线,不仅可对沥青混合料动态压缩模量水平3进行补充完善,推动30%掺量橡胶沥青混合料在沥青路面中的应用,而且可从沥青砂浆角度研究混合料复合模量的黏弹特性。In order to explore the correlation between composite moduli of rubber asphalt mortar and mixture,the dynamic modulus of mixture is predicted from the aspect of rubber asphalt mortar.First,regarding coarse aggregate and asphalt mortar as 2 separate units,the gradation of rubber asphalt mortar is determined.Then,the PCG rotation compaction method is used to determine the skeleton clearance rate of each coarse aggregate.Selecting the minimum skeleton clearance rate as the scale for determining the ratio of each coarse aggregate and the amount of asphalt mortar,the porosity of the mixture is designed as 4%.The asphalt mixture design is completed by calculating the asphalt content according to the specific surface area and asphalt film thickness of the aggregate.Filling the asphalt mortar with 85%,95%,100%and 110%of the minimum clearance volume of the skeleton,respectively,the asphalt mixture specimens are molded by using PCG rotary compression,and the composite modulus of asphalt mixture is measured by asphalt mixture performance tester(AMPT).The asphalt mortar specimens are prepared by static pressure molding method to measure the composite modulus.The result shows that(1)the composite moduli of both asphalt mortar and mixture satisfy the power function relation and they have higher correlation,the dynamic modulus of asphalt mortar is the smallest and its phase angle is the largest;(2)under the same condition,the dynamic modulus of mixture tends to increase with the increase of the filling rate of asphalt mortar,while the phase angle has little difference;(3)according to the dynamic moduli of asphalt mortar and mixture,the principal curve of modulus dynamic is fitted with the Sigmoidal mathematical model.Thus,not only level 3 of the dynamic compression modulus of asphalt mixture is supplemented and improved,which can promote the application of the asphalt mixture with 30%rubber in asphalt pavement,but also can study the viscoelastic behavior of the composite modulus of the mixture from the perspective of asphalt mo

关 键 词：道路工程 复合模量 试验研究 橡胶沥青砂浆 橡胶沥青混合料 

分 类 号：U414.3[交通运输工程—道路与铁道工程]