基于内聚能的改性沥青耐久性评价方法研究  

Study on Durability Evaluation Method of Modified Asphalt Based on Cohesion Energy

作　　者：王仁辉 安丰伟 郑扬 潘彬 WANG Renhui;AN Fengwei;ZHENG Yang;PAN Bin(National Engineering Research Center for Advanced Road Material,JSTI GROUP,Nanjing 211112)

机构地区：[1]苏交科集团股份有限公司新型道路材料国家工程研究中心,南京211112

出　　处：《石油沥青》2024年第3期23-27,61,共6页Petroleum Asphalt

摘　　要：采用不同耐久性评价方法对六种不同来源的SBS改性沥青进行了比较研究。通过对SBS改性沥青短期老化/长期老化前后针入度、黏度等主要技术指标变化情况的对比分析,发现基于能量的耐久性评价新指标-内聚能和内聚能比的老化变化规律符合改性沥青老化的一般规律,有效性得到初步确认,为沥青耐久性评价方法的优化开拓了一条新路径。In this paper,six kinds of SBS modified asphalt from different sources were compared by different durability evaluation methods.Through comparative analysis of the changes of major technical indexes such as needle penetration and viscosity before and after short-term or long-term aging of SBS modified asphalt,it was found that the change law of cohesion energy and cohesion energy ratio,the new index for durability evaluation based on energy,were in line with the general law of aging of modified asphalt,and its effectiveness were preliminatively confirmed,which opened up a new technical path for optimization of asphalt durability evaluation methods.

关 键 词：内聚能 沥青 测力延度试验 耐久性 

分 类 号：U414[交通运输工程—道路与铁道工程]