Fundamental?Performance?of?SBS/Gilsonite??Composite?Modified?Asphalt

doi:10.3969/j.issn.1674-0696.2009.03.19

Abstract

Abstract: The?influence?rule?of?the?proportion?of?SBS/gilsonite?on?performance?of?modified?asphalt?is?studied,?through?the?research?of?three?major?performance?indexes?of?SBS/gilsonite?composite?modified?asphalt.?The?results?show?that：?with?a?constant?amount?of?active?ingredient?in?modified?asphalt,?the?penetration?of?modified?asphalt?changes?little?when?the?proportion?of?gilsonite?increases;?the?softening?point?of?modified?asphalt?shows?a?downward?trend,?that?is?to?say,?the?effect?of?composite?of?gilsonite?and?SBS?on?the?improvement?of?softening?point?is?inferior?to?the?effect?of?SBS?itself;?the?ductility?of?modified?asphah?declines?significantly,?and?its?ductility?at?15℃?declines?even?sharply.?Adding?proper?amount?of?gilsonite?could?improve?the?dispersion?of?SBS?in?the?matrix?asphalt?to?some?extent

Key words: road engineering , modified asphalt , composite modification , gilsonite , SBS , softening point , penetration , ductility

摘要： 通过SBS/岩沥青复合改性沥青的三大性能指标研究,分析了岩沥青和SBS的用量比变化对改性沥青性能的影响规律。结果表明:在改性沥青中有效成分用量不变的情况下,随着其中岩沥青用量比例的不断增大,改性沥青针入度的变化不大;改性沥青的软化点呈明显下降的趋势,即岩沥青与SBS复合改性对提高软化点的效果不如单独应用SBS的效果好;改性沥青的延度呈明显下降的趋势,且改性沥青的15??延度的下降程度更为显著。适量添加岩沥青可在一定程度上提高SBS在基质沥青中的分散性。

关键词: 道路工程, 改性沥青, 复合改性, 岩沥青, SBS, 软化点, 针入度, 延度

CLC Number:

U414.7⁺5

PAN Ruo-yu, SUN Xiao-min, CHEN Yan-xian, LU Xiao-zhong. Fundamental?Performance?of?SBS/Gilsonite??Composite?Modified?Asphalt[J]. Journal of Chongqing Jiaotong University(Natural Science), 2009, 28(3): 548-550.

潘若妤,孙晓民,陈彦先,陆晓中. SBS/岩沥青复合改性沥青基本性能研究[J]. 重庆交通大学学报（自然科学版）, 2009, 28(3): 548-550.

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Fundamental?Performance?of?SBS/Gilsonite??Composite?Modified?Asphalt

SBS/岩沥青复合改性沥青基本性能研究

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