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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2009, Vol. 28 ›› Issue (3): 543-547.DOI: 10.3969/j.issn.1674-0696.2009.03.18

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天然岩沥青改性对沥青流变性能的影响

陆兆峰1,2,何兆益1,秦旻1,黄刚1   

  1. 1.重庆交通大学土木建筑学院,重庆400074;2.重庆交通大学机电与汽车工程学院,重庆400074
  • 收稿日期:2009-02-24 修回日期:2009-04-10 出版日期:2009-06-15 发布日期:2015-04-15
  • 作者简介:陆兆峰(1979—),男,安徽利辛人,讲师,博士研究生,研究方向为路基路面结构与施工技术。Email:luzha ofeng8123@163.com。
  • 基金资助:
    重庆市科技攻关项目( CSTS 2006 AB 6014)

Influence?of?Rock?Asphalt?Modified?Bitumen??on?Asphalt?Rheological?Property

LU Zhao-feng1, 2, HE Zhao-yi1, QiN Min1, HUANG Gang1   

  1. 1.?School?of?Civil?Engineering?＆?Architecture,?Chongqing?Jiaotong?University,?Chongqing?400074,?China;?2.?School?of?Mechanical?Electricity?＆?Automobile?Engineering,?Chongqing?Jiaotong?University,?Chongqing?400074,?China
  • Received:2009-02-24 Revised:2009-04-10 Online:2009-06-15 Published:2015-04-15

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摘要： 借助动态剪切流变仪(DSR)、低温弯曲流变仪(BBR)和Brookfild旋转黏度仪,对不同掺量的天然岩沥青改性 沥青的性能进行了试验研究,分析了岩沥青改性剂对基质沥青流变性能的影响。结果表明:加入岩沥青后沥青胶 结料的PG高温等级和黏度提高,抗车辙因子增大,相位角减小,大大提高了沥青的高温稳定性和降低了温度敏感 性,且随着掺量的增加变化幅度增大;低温条件下蠕变劲度模量增大,低温性能有所下降,但当岩沥青掺量为2%~ 8%时,不会对沥青胶结料的低温性能产生大的不利影响。

关键词: 岩沥青, 流变性能, DSR, 高温性能

Abstract: With?the?experiments?of?dynamic?shear?rheometer?（DSR）,?bending?beam?rheometer（BBR）?and?Brookfield?rotary?viscometer,?the?performances?of?modified?asphalt?with?different?mixing?contents?of?rock?asphalt?are?studied,?and?the?rheology?characteristics?of?modified?asphalt?are?analyzed.?The?results?indicate?that?the?high?temperature?PG?grades?and?the?viscosity?are?enhanced?;?the?anti-rutting?factor?is?increased?and?the?phase?angle?is?reduced;?the?high?temperature?stability?is?enhanced?greatly?and?the?temperature?sensitivity?is?reduced?after?mixing?in?rock?asphalt?modifier.?Furthermore,?the?change?rate?increases?with?the?increase?of?the?addition?;?the?creep?stiffness?modulus?increases?and?low-temperature?performance?decreases?at?a?low?temperature.?If?the?dosage?of?rock?asphalt?is?controlled?from?2%?to?8%?,it?would?have?no?considerably?adverse?influence?on?low?temperature?performance.

Key words: rock asphalt , rheological properties , DSR , high-temperature performance ;

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