沥青胶浆中矿粉沉降的影响因素及沉降检验  

Influence factors and test of mineral filler sedimentation in asphalt mortar

作　　者：李祖仲[1,2] 吴江龙[3] 陈拴发[1] 杨斐芃[1] 

机构地区：[1]长安大学材料科学与工程学院,陕西西安710061 [2]中国石油独山子石化公司,新疆克拉玛依833600 [3]中交第二公路工程局有限公司,陕西西安710065

出　　处：《长安大学学报（自然科学版）》2012年第4期12-15,20,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家材料科学数据共享网项目(2005DKA32800);交通运输部西部交通建设科技项目(200831881210);中央高校基本科研业务费专项资金项目(CHD2010JC011)

摘　　要：针对沥青胶浆中矿粉的沉淀问题,设计胶浆沉淀试验,测试胶浆密度及不同温度下的粘度,采用密度差量百分数,分析试验条件、胶浆材料组成对矿粉沉淀的影响,并对胶浆性能测试方法的适用性进行评价。结果表明:沥青胶浆在室温下冷凝,矿粉沉降对胶浆均匀性的影响并不显著,室温下成型试件的已有胶浆性能测试方法仍然适用;随着沥青胶浆温度上升,胶浆粘度急剧下降,矿粉沉降速率加快;随粉胶比增大,沉降差异性缩小;对于基质沥青,标号越高,矿粉沉降量越大,改性沥青密度差量百分数值均小于基质沥青,其均匀性好于基质沥青胶浆。To study the sedimentation of mineral filler in tar sedimentation test to determine the density and visc asphalt mortar, this paper designed mor osity of mortar under different tempera tures, analyzed the effect of test conditions and material composition on the mineral filler sedi- mentation by percentage of density difference to evaluate the applicability of the performance test methods of the asphalt mortar. The results show that the influence of mineral filler sedimentation on the uniformity of mortar is not significant during condensation at room temperature and the existing test methods of mortar performance by molding specimens at room temperature are appli- cable. The viscosity of asphalt mortar declines sharply and the rate of the mineral filler sedimen- tation accelerates with the rising of mortar temperature. It also proves that the difference of sedi- mentation among the mortars reduces as the increasing of filler-asphalt ratio, the higher the grade of base asphalt, the larger quantity of sediment miller is. The percentage of density difference of modified asphalt is smaller than that of base asphalt and the uniformity of the modified asphalt mortar is much better than that of the base asnhalt mortars. 5 tabs, 1 fig, 10 refs.

关 键 词：道路工程 沥青胶浆 矿粉 沉淀试验 密度差量百分数 胶浆性能 

分 类 号：U414.75[交通运输工程—道路与铁道工程]