19·2023年4月江西建材试验与研究不同再生剂对老化沥青分子量的分布影响及再生沥青性能研究张兴绪1，林柏松²，刘大海1.甘肃省白银公路事业发展中心，甘肃白银730900;2.甘肃省公路事业发展中心，甘肃兰州730000;3.甘肃畅陇公路养护技术研究院有限公司，甘肃兰州730000摘要：为了研究不同再生剂对于老化沥青分子量分布的影响，文中以四种不同再生剂（CL-1、CL-2、XK、CA）为研究对象，采用凝胶渗透色谱（GPC）试验方法，评价了四种再生剂再生沥青与老化沥青平均分子量分布情况，并进行了再生沥青重均分子量与常规性能指标相关性分析。结果表明，再生沥青重均分子量与针入度、延度、135℃黏度之间呈指数相关，与软化点之间呈线性相关。重均分子量越大，再生沥青针入度、延度越小，黏度、软化点越大，且重均分子量对常规指标影响排序为：延度>针入度>135℃黏度>软化点。关键词：沥青再生剂；重均分子量；凝胶渗透色谱中图分类号：U414文献标识码：A文章编号：1006-2890（2023）04-0019-03StudyontheInfluenceofDifferentRegenerativeAgentsontheDistributionofAgingAsphaltMolecularWeightandtheResearchonthePerformanceofRecycledAsphaltZhangXingxu',LinBaisong’,LiuDahai?1.BaiyinHighwayDevelopmentCenterofGansuProvince,Baiyin,Gansu730900;2.TheHighwayDevelopmentCenterofGansuProvince,Lanzhou,Gansu730000;3.GansuChanglongHighwayMaintenanceTechnologyResearchInstituteCo.Ltd.,Lanzhou,Gansu730000Abstract:Inordertostudytheeffectofdifferentregeneratorsonthemolecularweightdistributionofagedbitumen,theaveragemolecularweightdistributionofrecycledbitumenandagedbitumenoffourrecyclerswasevaluatedbygelpermeationchromatography(GPC)testmethod,andthecorrelationbetweentheaveragemolecularweightofrecycledasphaltandconventionalperformanceindicatorswasanalyzed.Theresultsshowthattheaveragemolecularweightofrecycledasphaltisexponentiallycorrelatedwithpenetrationdegree,ductilityandviscosityat135°C,andlinearlycorrelationwithsofteningpoint.Thelargertheweightaveragemolecularweight,thesmallerthepenetrationandductilityofrecycledasphalt,thegreatertheviscosityandsofteningpoint,andtheinfluenceofweightaveragemolecularweightonconventionalindicatorsissortedas:ductility>penetrationdegree>135...
