不同粉胶比下矿粉沥青胶浆路用性能研究  

STUDY ON THE ROAD PERFORMANCE OF MINERAL POWDER ASPHALT MORTAR WITH DIFFERENT FILLER-BITUMEN RATIOS

作　　者：吴倩 陈松强 WU Qian;CHEN Songqiang(Zhejiang Communications Investment Group Co.,Ltd.,Hangzhou 310020,China;Hangzhou City University,Hangzhou 310015,China)

机构地区：[1]浙江省交通投资集团有限公司,杭州310020 [2]浙大城市学院,杭州310015

出　　处：《低温建筑技术》2024年第5期20-23,共4页Low Temperature Architecture Technology

摘　　要：沥青胶浆是沥青混合料的重要组成部分,对沥青混合料的路用性能有着直接影响。为分析不同粉胶比对沥青胶浆性能的影响,采用动态剪切流变试验(DSR),以车辙因子为指标,分析沥青胶浆的高温流变特性;采用全温度与全频率扫描试验,以复数模量主曲线为指标,分析沥青胶浆的动力黏弹特性。试验结果表明,沥青胶浆的高温性能随着粉胶比的增加而增强。采用弯曲梁流变仪(BBR),以弯曲劲度模量和蠕变速率为指标,分析沥青胶浆的低温性能,试验结果表明沥青胶浆低温性能随着粉胶比的增加而降低。通过旋转黏度计测定胶浆的黏度,依据施工时黏度要求,计算施工温度,分析了矿粉填量对施工温度的影响。综上所述,随着粉胶比的增加,高温性能增强,但低温性能降低,再考虑施工要求,控制在1.0~1.2之间为宜。The performance of asphalt mortar directly affects the pavement performance of asphalt mixture as as⁃phalt mortar that is as an important component of asphalt mixture.In order to analyze the effectiveness of different filler-bitumen ratios on performance of asphalt mortar,dynamic shear rheological test(DSR)is conducted to study high-temperature rheological properties of asphalt mortar by using rutting factor.Full temperature and full frequen⁃cy scanning tests are conducted to study dynamic viscoelastic properties of asphalt mortar by using complex modulus main curve,indicating that high-temperature performance of asphalt mortar increases with the increase of filler-bitu⁃men ratio.Bending beam rheometer(BBR)is employed to study low-temperature performance of asphalt mortar by using bending stiffness modulus and creep rate,indicating that low-temperature performance of asphalt mortar de⁃creases with the increase of filler-bitumen ratio.In order to analyze influence of the amount of mineral powder on construction temperature,viscosity of asphalt mortar is measured by rotary viscometer and the construction tempera⁃ture is calculated according to the viscosity requirements during construction.As the filler-bitumen ratio increases,the high-temperature performance is enhanced,whereas the low-temperature performance decreases.It is advisable to control filler-bitumen ratio between 1.0 and 1.2 considering the construction requirements.

关 键 词：矿粉沥青胶浆 动力黏弹性 弯曲劲度模量 

分 类 号：TU535[建筑科学—建筑技术科学]