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1、第17卷第2期建筑材料學(xué)報(bào)Vo1.17。No.22014年4月JOURNALOFBUILDINGMATERIALSADr.。2O14文章編號(hào):10079629(2014)02034906日l(shuí)Ⅱ拌再生瀝青混合料的壓實(shí)特性研究紀(jì)小平,許輝,侯月琴,譚學(xué)章。(1.長(zhǎng)安大學(xué)特殊地區(qū)公路工程教育部重點(diǎn)實(shí)驗(yàn)室,陜西西安710064;2.甘肅省公路管理局,甘肅蘭州730030;3.甘肅省高等級(jí)公路建設(shè)開發(fā)有限公司,甘肅蘭州730030)摘要:提出溫拌再生瀝青混合料(wMRA)拌和與成型溫度的確定方法,采用旋轉(zhuǎn)壓實(shí)儀(SGC)成型試件,對(duì)比分析熱拌再生瀝青混合料(HMRA)和WMRA的體積參數(shù)及基于SG
2、C密實(shí)曲線的壓實(shí)特性參數(shù).結(jié)果表明:隨著回收瀝青路面材料(RAP)摻配量的提高,再生瀝青混合料的密實(shí)曲線斜率K,K值降低,空隙率、壓實(shí)能量指數(shù)(CEI)和交通密實(shí)指數(shù)(TDI)增大,再生瀝青混合料的可壓實(shí)性和壓實(shí)速率逐漸降低、開放交通后抵抗變形的能力逐漸增加;當(dāng)WMRA的成型溫度降低3o℃時(shí),其空隙率和CEI略小于HMRA,說(shuō)明溫拌劑大幅提高了再生瀝青混合料的和易性;wM—RA和HMRA的K,K。和TDI的均值基本一致,說(shuō)明溫拌劑對(duì)再生瀝青混合料的碾壓速率和抗變形能力基本無(wú)影響.關(guān)鍵詞:溫拌再生瀝青混合料;成型溫度;壓實(shí)特性;密實(shí)曲線中圖分類號(hào):U414.75文獻(xiàn)標(biāo)志碼:Adoi:10.
3、3969/j.issn.1007—9629.2014.02.031StudyonCompactionCharacteristicsofWarmMixedReclaimedMixtureJIXiaoping。XUHui。,HOUYueqin,NXuezhang?!?1.KeyLaboratoryforSpecialAreaHighwayEngineeringofMinistryofEducation,Chang’anUniversity,Xi’an710064,China;2.GansuProvinceAdministrationBureauofHighway,Lanzhou730030,
4、China;3.GansuHighwayConstruction&DevelopmentCo.Ltd.,Lanzhou730030,China)Abstract:Amethodfordeterminingthemixingandcompactiontemperatureofwarmmixedreclaimedas—phaltmixture(WMRA)wasproposedandsuperpavegyratorycompacter(SGC)wasusedtopreparethespecimens.Thevolumeparametersanddensificationcharacterist
5、icsofSGCdensificationcurvewerecom—DaredwithWMRAandhotmixedreclaimedasphaltmixture(HMRA).ResearchresultsindicatethattheslopesofdensificationCUrveK1andK2decrease,andairvoid(VV),compactionenergyindex(CEI)andtrafficdensificationindex(TDI)graduallyincreaseastheproportionofrecycledasphaltpavement(RAP)i
6、ncreasing.Thecompactingperformanceandcompactionspeedgraduallydecreaseandthecapacityofre—sistancefromdeformationafteropeningtotrafficincreasesastheproportionofRAPincreasing.TheVVandCEIofWMRAaresmailerthanthoseofHMRAwhenthecompactiontemperatureis3O℃lowerinpreparationofthespecimensofWMRA,withtheresu
7、ltthatthewarmmixagentscangreatlyimprovetheworkabilitvofmixtures.TheK1,K2andTDIarealmostequivalentbetweenWMRAandHMRA,thatissay,thewarmmixagentsareincapabletoimprovethecompactionspeedandresistancefromdeformation.Keywords