引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
分享到: 微信 更多
改性沥青的流变性和储存稳定性研究
范维玉,辛雪,梁明,姚艳,董夫强,南国枝
(中国石油大学重质油国家重点实验室,山东青岛 266580)
摘要:
以高富AH-50为基质沥青分别制备SBS、胶粉和EVA改性沥青,利用动态剪切流变仪(DSR)分析不同种类改性沥青动态黏弹参数(储存模量G′和损失模量G″)随频率和温度的变化,结合60 ℃稳态流动试验和Carreau模型表征沥青的流变性能,并用储存稳定指数IS表征不同改性剂与沥青的相容性能。结果表明:试验范围内,随频率的增加G′和G″逐渐变大,相同频率下G′明显小于G″,改性沥青以黏性成分为主,且两者的差值在低频和高温下较大;与基质沥青相比,SBS和胶粉改性沥青的临界剪切速率c降低幅度远大于EVA改性沥青的c,SBS和胶粉的掺加使沥青偏离牛顿流体的程度更大,对剪切的敏感性更高;SBS和胶粉与沥青的相容性较差,在相分离时SBS迁移至上段,胶粉迁移至下段,而EVA与沥青的相容性较好,体系不易发生相分离。
关键词:  动态黏弹参数  流变性能  储存稳定性能  改性沥青
DOI:10.3969/j.issn.1673-5005.2015.04.023
分类号::U 414
基金项目:中国石油大学研究生创新工程项目(YCX2014025)
Comparative study on the rheological properties and storage stability of modified bitumen prepared by different modifiers
FAN Weiyu, XIN Xue, LIANG Ming, YAO Yan, DONG Fuqiang, NAN Guozhi
(State Key Laboratory of Heavy Oil Processing in China University of Petroleum, Qingdao 266580, China)
Abstract:
Three modified bitumens were prepared using different modifiers:SBS, rubber, and EVA with Gao Fu AH-50 as the base bitumen. And the rheological properties were characterized of the modified bitumens by dynamic viscoelastic parameters (storage moduli G′ and loss moduli G″) changes with the frequency and temperature using dynamic shear rheometer (DSR) with the combination of viscous flow behavior at 60 ℃ and the Carreau model. Meanwhile, the compatibility between asphalt and different modifiers were evaluated by the IS. It is found that for the modified bitumens the G′ and G″ are improved gradually with the increase of the frequency. G′ is smaller than G″ significantly, which indicates the viscous part is dominant for modified samples. And the difference between the two parameters becomes larger at low frequency and high temperature. The reduced extents of critical shear rate c for SBS and rubber modified bitumens are far bigger than that for EVA modified one, meaning the addition of SBS and rubber make the modified bitumen show more non-Newton fluid behavior with higher shear sensitivity. The compatibility between SBS, rubber and asphalt is not good in terms of IS, in which the SBS moves to the tube top, and rubber moves to bottom on the contrary at the phase separation. However, EVA is found to have good compatibility with bitumen.
Key words:  dynamic viscoelastic parameters  rheological properties  storage stability  modified bitumen
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学(华东)
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983553 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计