資源描述:
《瀝青混凝土再生集料的棱角性分析.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第28卷第1期中國(guó)公路學(xué)報(bào)Vol.28No.12015年1月ChinaJournalofHighwayandTransportJan.2015文章編號(hào):1001-7372(2015)01-0024-06瀝青混凝土再生集料的棱角性分析唐伯明1,郭鵬1,肖巧林1,戰(zhàn)琦琦2(1.重慶交通大學(xué)交通土建工程材料國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室,重慶400074;2.重慶重交瀝青砼再生制造有限公司,重慶400060)摘要:為研究不同比例再生集料的棱角性變化規(guī)律對(duì)瀝青混合料高溫穩(wěn)定性能的影響,采用動(dòng)態(tài)顆粒圖像分析技術(shù),以球形度、粗糙度為指標(biāo)評(píng)價(jià)集料的棱角性,分析集料的變化特性。
2、研究結(jié)果表明:集料的棱角性與粒徑大小具有一定的相關(guān)性;隨著粒徑的增大,球形度增大,粗糙度下降;對(duì)比5種集料的棱角性,花崗巖的棱角性較好,回收集料2的較差;回收集料與新集料形成的再生集料具有良好的棱角性,其摻量對(duì)再生集料的球形度和粗糙度影響較小;再生瀝青混合料的高溫穩(wěn)定性與再生集料的棱角性線性相關(guān)。關(guān)鍵詞:道路工程;再生集料;圖像處理;棱角性中圖分類(lèi)號(hào):U416.217文獻(xiàn)標(biāo)志碼:AAnalysisofAngularityofAsphaltConcreteRecycledAggregate1,GUOPeng1,XIAOQiao-lin1,ZHANQi-qi
3、2TANGBo-ming(1.NationalandLocalJointEngineeringLaboratoryofTrafficCivilEngineeringMaterials,ChongqingJiaotongUniversity,Chongqing400074,China;2.ChongqingZhongjiaoAsphaltConcreteRenewableManufacturingCo.,Ltd.,Chongqing400060,China)Abstract:Inordertostudytheinfluenceofangularitycha
4、ngesofrecycledaggregateswithdifferentproportionsofoldandnewaggregateonthehightemperaturestabilityofasphaltconcrete,withthetechnologyofdynamicparticleimageanalysis,thevariationcharacteristicsofaggregatewereanalyzedthroughangularities,thatwereevaluatedbysphericaldegreeandroughness.
5、Theresultsshowthataggregateangularityandparticlesizehaveacertaincorrelation,andthesphericaldegreeshowsanupwardtrendwiththeincreaseofparticlesize,butroughnessshowsadownwardtrend.Throughthecontrastofangularitiesoffiveaggregates,granitehasabetterperformanceofangularitybetterandrecol
6、lectedaggregate2hasapoorperformanceofangularity.Therecycledaggregatethatiscomposedofrecollectedaggregateandnewaggregatehasagoodperformanceofangularity,thecontentofrecollectedaggregatehaslittleinfluenceonrecycledaggregatesphericaldegreeandroughness.Thereisagoodlinearcorrelationbet
7、weenhightemperaturestabilityandrecycledaggregateangularity.Keywords:roadengineering;recycledaggregate;imageprocessing;angularity載、環(huán)境的作用后,集料顆粒出現(xiàn)不同程度的細(xì)化,0引言棱角與紋理變得光滑,以致集料之間不能相互嵌擠,再生瀝青混合料中集料的形態(tài)結(jié)構(gòu)受交通荷影響瀝青混合料的骨架結(jié)構(gòu)和抗剪切作用。收稿日期:2014-02-25基金項(xiàng)目:國(guó)家自然科學(xué)基金項(xiàng)目(51278515);重慶市交通科技項(xiàng)目(KJXM2011-0186)
8、;交通土建工程材料國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室開(kāi)放基金項(xiàng)目(LHSYS-2014-09