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1、第32卷第5期2015年5月公路交通科技JournalofHighwayandTransportafionResearchandDevelopmentVoi.32No.5Mav2015doi:10.3969/j.issn.1002—0268.2015。05.002瀝青混合料抗沖刷性能的試驗(yàn)研究朱唐亮,談至明(同濟(jì)大學(xué)道路與交通工程教育部重點(diǎn)實(shí)驗(yàn)室,上海201804)摘要:對(duì)普通AC、改性SMA和改性O(shè)GFC3類瀝青混合料的抗沖刷性能開(kāi)展了詳細(xì)的試驗(yàn)研究,結(jié)果表明,沖刷應(yīng)力比A是影響瀝青混合料抗沖刷能力的最關(guān)鍵因素,它可消除同類瀝青混合料中由于不同瀝青
2、含量、溫度和沖刷水壓力所引起的差異。建立了沖刷次數(shù),v與沖刷深度d、沖刷應(yīng)力比A的一般式。3種材料抗沖刷系數(shù)A的變化范圍為0.9X105~1.7X105。沖刷深度指數(shù)b和沖刷應(yīng)力比指數(shù)c取決于瀝青性質(zhì),其中,基質(zhì)瀝青和改性瀝青的沖刷深度指數(shù)b分別為2.15,2.26,沖刷應(yīng)力比指數(shù)c為3.9,4.0。瀝青類材料的c值與其疲勞指數(shù)較接近。凍融后材料的抗沖刷系數(shù)、沖刷應(yīng)力比指數(shù)基本保持不變,抗沖刷性能的下降可歸結(jié)于結(jié)構(gòu)強(qiáng)度的下降。關(guān)鍵詞:道路工程;瀝青混合料;試驗(yàn)研究;抗沖刷性能;沖刷應(yīng)力比指數(shù)中圖分類號(hào):U416.217文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002
3、—0268(2015)05—0007—06ResearchonErosion-resistancePerformanceofAsphaltMixtureZHUTang·liang,TANZhi—ruing(KeyLaboratoryofRoadandTrafficEngineeringofMinistryofEducation,TonaiiUniversity,Shanghai201804,China)Abstract:Theerosion—resistanceperformanceof3typesofasphaltmixtureincludingo
4、rdinaryasphaltconcrete(AC),modifiedstonematrixasphalt(SMA)andmodifiedopengradedfrictioncoupe(OGFC)areexperimentallystudied.TheresultshowsthaterosionstressratioAisthemostkeyinfluencingfactortotheerosion—resistanceperformanceofasphaltmixtures,itcouldeliminatethedifferencecausedby
5、differentasphaltdosage,temperatureandhydrodynamicpressureinthesamekindofasphaltmixture.ThegeneralexpressionamongerosiontimesN,erosiondepthdanderosionstressratioAforasphaltmixturesisestablished.Thevariationrangeofanti—erosioncoefficientAof3kindsofasphaltmixtureis0.9×105~1.7x105.
6、Theerosiondepthindexbanderosionstressratioindexcarerelatedtothenatureoftheasphalt.a(chǎn)mongthem,thevalueofbofbaseasphaltandmodifiedasphaltis2.15and2.26respectively,thevalueofCofbaseasphaltandmodifiedasphaltis3.9and4.0respectively.ThevalueofCofasphaltmixturesisrelativelyetosetothefa
7、tigueindex.Freeze—thawhaslittleeffectonthematerials’anti—erosionindexesanderosionstressratioindexes,thedropoftheroadmaterials’anti—erosionperformancecouldbemainlyattributedtothedecreaseofthematerialstrength.Keywords:roadengineering;asphaltmixture;experimentalresearch;erosion—re
8、sistanceperformance;erosionstressratiojndex。引言.鼗衾掣婁薯薷: