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时间:2020-03-25
《基于抗老化和高温流变分析的废机油改性沥青性能评价.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第41卷,第3期公路工程Vol.41,No.32016年6月HighwayEngineeringJun.,2016基于抗老化和高温流变分析的废机油改性沥青性能评价赵培松(河南中原高速公路股份有限公司,河南郑州450000)[摘要]为了探究废机油对沥青的改性效果,通过试验研究废机油掺量对沥青抗老化性能和高温流变性能的影响。试验结果表明,废机油能明显提高沥青的抗老化性能,其中当废机油掺量小于4%时,增大废机油掺量对抗老化性能的改善程度较大,而当废机油掺量大于4%时,提高掺量对抗老化性能的改善程度较小。随着废机油掺量
2、的增多,沥青相位角δ逐渐增大,复数剪切模量G﹡、车辙因子G﹡/sinδ和疲劳因子G﹡·sinδ逐渐减小,当废机油掺量大于4%时,G﹡/sinδ急剧减小,表明废机油虽能较好的改善沥青的抗疲劳性能,但过高的掺量会使抗车辙性能严重不足,因此废机油掺量不宜大于4%。废机油能从一定程度上降低沥青混合料的施工温度,且掺量越多,降低幅度越大。[关键词]道路工程;废机油;改性沥青;抗老化性能;流变性能;施工温度[中图分类号]414.1[文献标识码]A[文章编号]1674—0610(2016)03—0154—04Performa
3、nceEvaluationofWasteOilModifiedAsphaltBasedonAntiAgingandHighTemperatureRheologicalAnalysisZHAOPeisong(HenanzhongyuanExpresswayCo.,LTD.Zhengzhou,Henan450000,China)[Abstract]Inordertoexplorethemodificationeffectofwasteoilonmodifiedasphalt,Thetestsarecarriedou
4、ttostudytheeffectofwasteoilcontentontheantiagingperformanceandhightemperaturerheologicalpropertyofasphalt.Theexperimentalresultsshowthatwasteoilcansignificantlyimprovetheantiageingperformanceofasphalt,andwhentheamountofwasteoilislessthan4%,increasewasteoilco
5、nmentcanimprovetheantiagingperformanceofasphaltsignificantly;whentheamountofwasteoilismorethan4%,theimprovementoftheresistancetoagingissmall.Withtheincreaseoftheamountofwasteoil,thephaseangleδofasphaltincreasesgradually,thecomplexshearmodulusG﹡,rutfactorG﹡/s
6、inδandfatiguefactorG﹡.sinδdeltagraduallydecrease.Whentheamountofwasteoilismorethan4%,theG﹡/sinδwilldecreasesharply,whichindicatesthatthewasteoilcanimprovetheantifa﹣tigueperformanceofasphalt.however,thehighcontentofthewasteoilcanbeusedtoreducetheruttingresist
7、ance,therefore,theamountofwasteoilisnotmorethan4%.Wasteoilcanreducedtheconstruc﹣tiontemperatureofasphaltmixture,andthemoredosage,thelowertherateis.[Keywords]roadengineering;wasteoil;modifiedasphalt;antiageingproperty;rheologicalproperty;constructiontemperatu
8、re[1]间长、紫外线辐射强烈。在高寒高海拔地区铺筑0前言沥青路面会遭受严峻的考验,新建沥青路面在铺筑我国高寒高海拔地区气候条件恶劣,具有显著不久后即出现开裂、松散、干涩等病害,严重缩短了[2,3]的高原气候特征,常年气温低,昼夜温差大、日照时沥青路面的服役寿命和使用质量,而大多数病[收稿日期]2015—12—21[项目基金]国家自然基金项目(51378325)[作者简介]赵培松(19
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