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
王仁辉 1安丰伟 1郑扬 1潘彬1
作者信息
- 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
- 折叠
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.
Abstract
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 eval-uation 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 e-valuation methods.
关键词
内聚能/沥青/测力延度试验/耐久性Key words
cohesion energy/asphalt/force ductility test/durability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据