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引用本文:	姚鸿儒,曹亚东,周晓龙,乐海淳.高性能改性沥青的弹性恢复试验条件研究[J].建筑材料学报,2021,24(2):370-377

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高性能改性沥青的弹性恢复试验条件研究
姚鸿儒¹, 曹亚东², 周晓龙¹, 乐海淳²
1.华东理工大学石油加工所,上海200237;2.上海公路桥梁集团有限公司,上海200433

摘要:

通过探索并优化弹性恢复的试验条件来有效评价高性能改性沥青的路用性能.结果表明：改变高性能改性沥青的恢复时间或拉伸长度,沥青区分度增加均不明显;改变试验温度,沥青区分度较好;在25℃的标准试验温度下,沥青弹性恢复率受SBS掺量的影响很小;在5℃的试验温度下,沥青弹性恢复率受SBS掺量的影响较为明显,沥青区分度好,且与重复蠕变恢复试验结果具有很好的一致性.因此建议在评价高性能改性沥青性能时,采用5℃弹性恢复率这一指标.

关键词: 高性能改性沥青弹性恢复试验温度相关性

DOI：103969/j.issn.1007 9629202102020

分类号:

基金项目:上海市产业转型升级专项资金(产业技术创新)企业技术创新能力提升项目(沪J 2018 29)

Conditions of Elastic Recovery Test for High Performance Modified Asphalts

YAO Hongru¹, CAO Yadong², ZHOU Xiaolong¹, LE Haichun²

1.Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China;2.Shanghai Road and BridgeGroup Co., Ltd., Shanghai 200433, China

Abstract:

Conditions of elastic recovery were explored and optimized to evaluate the properties of high performance modified asphalts effectively. The results show that it is not obvious to change the hold time or elongation of the high performance modified asphalts while it is obvious to change test temperature. SBS content of high performance modified asphalts has a slight influence on elastic recovery at 25℃ but it becomes obvious at 5℃. The results accord with those from repeated creep recovery test. So evaluation of high performance modified asphalts is suggested to be carried out at 5℃.

Key words: high performance modified asphalt elastic recovery test temperature correlation