沥青老化对集料粘附性能影响规律及评价方法研究  

Research on Influence Regularities and Evaluating Indicators of Adhesion Property between Aging Asphalt and Aggregate

作　　者：聂忆华[1] 戴旭[1] 班钰镇 徐望国[1] 

机构地区：[1]湖南科技大学,湖南湘潭411201 [2]龙光集团广贺高速公路项目部,广东深圳518101

出　　处：《公路工程》2010年第6期34-37,共4页Highway Engineering

基　　金：湖南省教育厅资助项目(09C395);湖南科技大学博士启动基金(E50910)

摘　　要：采用延时烘箱老化方法对基质沥青和改性沥青进行不同时长的老化,探讨采用水煮前后质量损失率评价沥青与集料粘附性的可行性,分析了粘附等级和质量损失率指标随沥青老化程度变化的规律,探讨了粘附等级与质量损失率两种评价指标的相关性。结果表明:随着沥青老化程度加深,沥青与集料的粘附等级下降,水煮前后质量损失率上升;改性沥青老化后与集料的粘附性能下降幅度较基质沥青小,抗水损能力强;水煮前后质量损失率与粘附等级有稳定的相关关系,且质量损失率量化了粘附等级的评价过程,测试结果客观性高。In the paper,the method of prolong aging time in oven was adopted to get different aging degree asphalt,such as base asphalt and modified asphalt.Firstly,The mass loss percent during water cooking and adhesion grade were tested to evaluate the adhesion property.Then,the influence regularities of adhesion property was analyzed due to asphalt aging.Finally,the relativity between mass loss percent and adhesion grade was carried out.It is found that adhesion grade is falling,and mass loss percent is increasing while asphalt aging degree is growing.And the study result also proves that modified asphalt has better adhesion property than base asphalt.The two evaluation indicators has stabilization relativity.The mass loss percent is advised to use to evaluate adhesion property for better objectibity.

关 键 词：沥青 老化 粘附性能 粘附等级 质量损失率 

分 类 号：U414.1[交通运输工程—道路与铁道工程]