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《瀝青混合料高溫性能剪切破壞模量研究》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、摘要車轍是瀝青路面的主要病害形式，采用何種試驗方法及指標(biāo)能更有效的評價瀝青混合料的高溫性能已成為亟需解決的問題。本文在分析各種試驗方法及評價指標(biāo)的基礎(chǔ)上，提出采用等速率軸向局部加載試驗得到的剪切破壞模量指標(biāo)來評價瀝青混合料高溫性能。針對影響瀝青混合料高溫性能的內(nèi)在因素，本文主要從混合料的級配、油石比、瀝青類型、空隙率等方面分析了剪切破壞模量指標(biāo)的變化規(guī)律。在此基礎(chǔ)上進行了車轍試驗，通過車轍試驗結(jié)果與等速率軸向局部加載試驗結(jié)果的對比分析，認(rèn)為，剪切破壞模量與車轍動穩(wěn)定度指標(biāo)有著較好的相關(guān)性。剪切破壞模量作為評價瀝青混合料高溫性能的力學(xué)指標(biāo)是可行的。介紹了影響剪切破壞模量因素的評價方
2、法。通過計算瀝青混合料馬歇爾體積參數(shù)的灰關(guān)聯(lián)度，認(rèn)為，空隙率、飽和度對剪切破壞模量的影響較大，并在此基礎(chǔ)上建立了模量的預(yù)估模型。方差和殘差回歸分析結(jié)果表明，該模型可以有效地評價瀝青混合料高溫性能。匯總?cè)牡难芯砍晒J(rèn)為，剪切破壞模量作為評價高溫性能的力學(xué)指標(biāo)對指導(dǎo)瀝青混合料設(shè)計及性能預(yù)測有重要的現(xiàn)實意義。關(guān)鍵詞：瀝青混合料、高溫性能、軸向局部加載試驗、車轍試驗、剪切破壞模量AbstractRuttinghasbecomethefirstoneoftheasphaltpavementdamagephenomenon．Wemusttaketheappropriatetestmetho
3、dsandevaluationindexesasthemostexigentproblemtosolve．Thispaperproposeusingtheshearfailuremodelwhichwecanreceivefromtheseemspeedaxialpartialloadingteststoevaluatethehi．ghtemperatureperformanceofasphaltpavementonthebasisofanalyzingallkindsoftestmethodsandevaluatingindexs．Againsttheinfluencingfa
4、ctorsofasphaltmixtures，thepapermainlyanalysisthechangesoftheshearfailuremodulefromtheasphaltmixturepercentageofvoidvariety,theratioasphaltanddifferentgradationanddifferentkindsofasphaltrespects．Thencardedontheruttingtests，throughanalyzingtheresultofruttingtestandtheseemspeedaxialpartialloadin
5、gtests，weconsiderthatthereexistsgoodrelevancebetweentheshearfailureindexmoduleandrutdynamicstability．Theshearfailuremoduleissuitabletoevaluatethehightemperatureperformanceofasphaltpavement．IntroducedtheevaluatingmethodsofinfluencemodulefactorsGreycorrelmionanalysisindicatesthatvolumeofairvoid
6、sandpercentofthevoidsinmineralaggregateisthemostimportantfactorformodule．Onthebasisofanalyticalresultestablishtheshearfailuremoduleestimatingmold．ResidualvarianceandregressionanalysisresultsshowthatthemoduleCaneffectivelyevaluatethehightemperatureperformanceofasphaltpavement．Collectingtherese
7、archfinding，asthemechanicalindex，itisverysignificanttoapplyshearfailuremoduledirectingthedesignofthehotmixasphaltandpredictingperformance．Keywords：hotasphaltmixture；hightemperatureperformance；seemspeedaxialpartialloadingtests；ruttingtest；shea
