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简介：Theobjectiveofthisresearchwastoshowawaytoconductrejuvenationofagedpolymermodifiedasphaltbinder(PMB)successfully.TofullyevaluateandunderstandtherejuvenationofagedPMB,thePenetrationgradetestsincludingpenetration,softenpoint,ductilityandelasticrecoveryandSuperpaveTMPGgradetestsincludingDSR,BBRandDDTwereconducted.TherejuvenationeffectofagedPMBbyutilizingafluidrecyclingagentincommonuseforbinderrejuvenationwasevaluated.AndthenthecompoundrejuvenationeffectofagedPMBbyutilizingtherecyclingagentwithanewmodifyingadditiveforbindermodificationwasevaluated.Theexperimentalresultsindicatedthattherecyclingagentincommonusecurrentlydoesnotapplytopolymermodifiedasphaltbinderrejuvenation.Buttherecyclingagenttogetherwiththemodifyingadditivecanrestorethecharacteristicsofagedpolymermodifiedbinderverywell.Therefore,compoundrejuvenationofpolymermodifiedasphaltbinderisrecommended.

简介：面包屑橡胶修改了包含30网孔的20%面包屑橡胶粒子的沥青被扫描电子显微镜(SEM)在沥青观察小宇宙的外观和面包屑橡胶粒子的典型分发检验了。SEM图画表明面包屑橡胶粒子在沥青均匀地散布并且他们与沥青兼容很好。shear爬面包屑橡胶的测试修改了沥青被执行在?10结合了穿着的板成功地在下列过程被获得：从18张层Al1060/Al3003表的基本的穿着的表第一在450点与44%的起始的滚动减小被获得???????????????″??吗？？

简介：Boehmitesolissynthesizedviasol-gelprocessusingals,thenaddingsilicasolintoboehmitesoltopreparemulliteprecursorgels.XRDstudiesareperformedtocharacterizethegels.itisfoundthatthegelcanbetransformedintomullitewhencalcinedat1100℃andcompletedat1300℃.Corundum-mullitefirebrickswithdifferentadditionsofthemulliteprecursorgelaremadebymixing,semi-drypressingandthensinteringat1520℃.Apparentporosity,bulkdensity,flexuralstrengthandthermalshockresistancearemeasured.Resultsshowthatthemullitegelcanimprovedensificationandstrengthofcorundum-mullitefirebricks,especiallyenhancethethermalshockresistance.SEMmicrographsshowthatthegeladdedcanbeformedintoneedlelikeandelongatedmulliteinthematrix,whosemicromorphologycanenhancethestrengthandthermalshockresistanceofthesamples.

简介：Nanomeshgraphene(NMG)obtainedbytemplatechemicalvapordepositionwasusedtosynthesizethebinder-freegraphenemonolithsbysimpletabletpressing.ThestackingmanneroftheNMGsheetswascrucialtothecohesioninteractionbetweenthegraphenesheets,onlytheNMGmaterialswithalooselystackingmannercouldbepressedintobinder-freemonoliths.Atthetabletingpressureof2-8MPa,boththebulkdensitiesandthespecificsurfaceareasofthemonolithskeepnearlyconstantasthetabletingpressureincreases,indicatingthattheNMGmonolithshaveobviouselasticityandaporousstructureduetothelargecorrugationsandthemeshstructuresofthegraphenesheets.Asaresult,anextraordinarymethanestoragecapacityof236(v/v)at9MPawasobtainedinthegraphenemonolithpreparedbytabletingat4MPa.

简介：  摘要：目的 探讨超声在产前诊断胎儿颜面部、脊柱、足等畸形综合征中的价值。方法 回顾性分析一例胎儿颜面部、脊柱及足异常病例，探讨超声在此类综合征中的应用价值。结果：超声在此类综合征中具有重要作用。   

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简介：Thedevelopmentofefficientbondingagentsisoneaspectoftheadvancementofrefractories.Basedonanewlydevelopedbindersystem,anewgenerationoftar-resinbondedmagnesiacarbonproductswithhighperformancehasbeendeveloped.Furthermore,thebindersystemcharacterizedbyhighcarbonyieldaftercarbonizationresultsinforminganextremelystrongcarbonbonding.Itcanimproverefractoriespropertiestogetnewproductwithmoreadvantagesthanoldrefractories:moreeconomic,lowercostandlowtoxicity.Tar-resinisnotonlyusedinshapedrefractories,butalsoinmorerefractoriestypes,suchasmonolithicrefractories.ImmersionexperimentsofMgO-Cmonolithicrefractoriessamplesinliquidsteelat1600℃havebeencarriedoutforsteelmakingindustry.TheseexperimentsshowedtheformationofadenseandcontinuousMgOrichlayer,ontheinterfacebetweenrefractoryandsteel,andthepossibleformationofinclusionsaslargeclustersprotrudingfromtherefractorysurface.Forthemechanicalproperties,thepowderwasheatedupto1400℃inairtoremovecarbon,andwassubsequentlyformedintobrickshape.StandardASTMwasusedtodeterminetheMOR,porosityanddensity.Itisfoundthatantioxidantmaterialsplayanimportantroleinimprovingthemechanicalproperties.

简介：Anovelporousbinderwasobtainedfromacid-treatedkaolin.Thisnewbinderpossessedabundantmeso/macropores,goodhydrothermalstabilityandheavymetalresistance.Thepreparedcatalystusingnewbinderfeaturedlowattritionindexandlargeporevolume.ThecatalystswerecontaminatedwithNi,V,andtestedinafixed-fluidizedbedreactorunit.Incomparisonwiththereferencesample,theoilconversionachievedbytheabove-mentionedcatalystincreasedby3.50percentagepoints,andheavyoilyielddecreasedby2.86percentagepoints,whilethetotalliquidyieldandlightoilyieldincreasedby2.82percentagepointsand0.79percentagepoints,respectively.Theperfectporestructure,goodhydrothermalstabilityandheavymetalresistantperformanceofnewbinderwerethepossiblecausesleadingtoitsoutstandingperformance.

简介：摘要：本文重点对顾桥选煤新安装的奥地利 BINDER公司生产的 KRL/ED3600×7.3m型弛张筛在现场的使用的效果进行总结，并与我厂先前使用的香蕉筛进行应用效果分析与比较，分析各种筛分设备的优缺点。

简介：Thecoarseporesystem,interfacialtransitionzone(ITZ)betweenaggregateandpastematrixandvolumefractionofunhydratedcementinconcrete(w/c=0.3)containingmineraladmixtureswerequantitativelycharacterizedbythescanningelectronmicroscope-backscatteredelectron(SEM-BSE)imageanalysistechnique.Theexperimentalresultsshowthatcompoundadditionofslagandflyashdecreasesthecoarseporosityfrom10.17%to3.74%andthethresholddiameterofcoarseporesizefrom345μmto105μmcomparedwithconcrete(w/c=0.30)withoutmineraladmixtures;Moreoverwithcompoundadditionofflyashandslag,thevolumeproportionofunhydratedcementinpastematrixisreducedby30%,themaximumamountofcoarseporesintheITZbetweenaggregateandpastedecreasesfrom13.11%to5.57%andthethicknessofITZisreducedby37%,comparedwithconcretewithoutmineraladmixtures.

简介：Afree-standingpaper-likethree-dimensionalgrapheneframework(3DGF)withorientatedlaminarstructureandinterconnectedmacropores,wasobtainedbythehardtemplate-directedorderedassembly.Asthesacrificialtemplates,polystyrene(PS)latexsphereswereassembledwithgrapheneoxide(GO)tobuildupasandwichtypecompositefilm,followedbyheatremovalofwhichwithasimultaneousreductionofGO.The3DGFexhibitedhighspecificsurfaceareaof402.5m2/g,controllableporesandmechanicalflexibility,whichwasemployedasthebinder-freesupercapacitorelectrodeandshowshighspecificgravimetriccapacitanceof95F/gat0.5A/g,withenhancedratecapabilityin3electrodeKOHsystem.

简介：Forthefirsttime,WO2.72nanowireswerein-situgrownoncarbonclothbyasimplesolvothermalreaction.ThenanowireWO2.72/carboncloth(NWWO2.72/CC)electrodeshowedgoodelectrochemicalperformancewithspecificcapacitance(Cs)reachingupto398Fg-1atacurrentdensityof2Ag-1.Thecapacitanceof240Fg-1wasretainedatahighcurrentdensityof16Ag-1.Tofurtherevaluatetheenergystorageperformance,flexibleasymmetricsupercapacitors(FASCs)werefabricatedusingtheactivatedcarbon/carboncloth(AC/CC)asnegativeelectrodeandNWWO2.72/CCaspositiveelectrode,respectively.TheFASCsdeliveredahighenergydensityof28Whkg-1atapowerdensityof745Wkg-1and13Whkg-1evenatahighpowerdensityof22.5kWkg-1.Moreimpressively,81%ofthespecificcapacitanceoftheFASCswasretainedafter10,000cycles,indicatingexcellentcyclestability.ThisworkindicatestheNWWO2.72/CCholdsagreatpotentialforapplicationinenergystoragedevices.

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简介：力量的发展和用在在低温度的硫酸盐环境下面的低水文件夹比率的石灰石粉末做的基于水泥的材料的攻击的形式被学习。结果显示当水文件夹比率比0.40低时，有石灰石粉末的基于水泥的材料在为120d在低温度在10%镁硫酸盐答案被浸泡，并且在在200d岁时被浸泡以后在外观有重要变化以后在外观有不足道的变化。扩大损坏和脱落在不同层次发生在具体测试立方体的表面上。当石灰石粉末占大约28%似水泥的材料时，与水文件夹比率的减少，在材料在200d岁时在低温度在镁硫酸盐答案被浸泡以后，压缩力量损失逐渐地减少了。在有不到0.4的水文件夹比率和石灰石粉末卷的标本以后大与20%在200d岁时在低温度在10%镁硫酸盐答案被浸泡比，带攻击的破坏被引起到具体测试立方体的石膏，没有thaumasite硫酸盐攻击。