您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第2期    总第83期    2017年2月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7029(2017)02-0250-07
基于评价SBS改性沥青高温性能的修正软化点方法
孙培1,韩森1,高榕2,原健安3

(1. 长安大学 特殊地区公路工程教育部重点实验室,陕西 西安 710064;
2. 西京学院,陕西 西安 710064;
3. 长安大学 理学院,陕西 西安 710064
)

摘 要: 为了获得与混合料高温性能相关的SBS改性沥青软化点评价方法,通过变化试验条件(加热介质、测试板距)分析不同结构类型和掺量的SBS改性沥青软化点变化规律,并进行SBS改性沥青混合料的车辙试验。试验结果表明:标准条件下的SBS改性沥青软化点与其混合料的高温性能没有直接关系,也很难鉴别不同SBS改性沥青之间软化点的差异。在对其试验条件修正为“测试板距10 mm,加热介质采用甘油”,即修正软化点法后,所测得的环球法软化点可显著区分不同SBS改性沥青之间的差异,且与其混合料的高温稳定性能指标——动稳定度有良好的相关性。

 

关键字: 道路工程;软化点;试验条件;高温性能;SBS改性沥青;修正软化点法

A revised softening point method based on evaluating the high temperature property of SBS modified asphalt
SUN Pei1, HAN Sen1, GAO Rong2, YUAN Jianan3

1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China;
2. Xijing University, Xi’an 710064, China;
3. School of Science, Chang’an University, Xi’an 710064, China

Abstract:To achieve the evaluation method of SBS modified asphalt related to the high temperature performance of mixture, the softening points of SBS modified asphalt with different types and dosages were analyzed under different test conditions (heating medium and board distance). Meanwhile, rutting tests were done to SBS modified asphalt mixture. The results show that the softening point measured under current specification method (ASTM D36)have no direct relationship with the high performance of mixture, and it is hard to identify the difference of softening points of different SBS modified asphalt. When the test conditions are revised to “the board distance of 10 mm and the heating medium of glycerinum”, the softening points of different SBS modified asphalt measured under revised method could be significantly distinguished and are closely related to the dynamic stability of mixtures.

 

Key words: road engineering; softening point; test condition; high temperature performance; SBS modified asphalt; revised softening point method

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn