矿物填料种类与含量对沥青胶浆PG分级的影响  

Effects of Type and Content of Mineral Fillers on PG Grade of Asphalt Mastic

作　　者：曾梦澜[1] 谢学成 李君峰[1] 陈伟[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湘潭大学自然科学学报》2017年第2期13-19,共7页Natural Science Journal of Xiangtan University

基　　金：湖南省交通运输厅科技进步与创新计划项目(201110)

摘　　要：为研究矿物填料的种类与含量对沥青胶浆PG分级的影响,利用动态剪切流变试验、低温弯曲梁流变试验,在沥青胶结料的评价体系上,提出利用沥青胶浆车辙因子、疲劳因子、蠕变劲度和劲度变化率临界值确定不同沥青胶浆的PG连续分级温度.研究表明:相对于石灰岩矿粉,消石灰和水泥更能有效改善沥青胶浆高温连续分级温度;矿物填料总体对沥青胶浆低温连续分级温度产生消极作用.To evaluate the effects of type and content of mineral fillers on PG grade of asphalt mastic,dynamic shear rheometer（DSR）and bending beam rheometer（BBR）tests were conducted on asphalt mastics.Critical values of rutting parameter,fatigue cracking parameter,creep stiffness and change rate in creep stiffness were suggested to determine continuous grading temperatures as an evaluation system for asphalt mastic.Analyses show that hydrated lime and Portland cement can improve the high temperature of asphalt mastic more effectively than limestone filler.In general,mineral fillers have adverse effects on the low temperature of asphalt mastic.

关 键 词：沥青胶浆 矿物填料 PG连续分级 

分 类 号：U414[交通运输工程—道路与铁道工程]