英语学习木质纤维的性能特点及其在工程中的应用1.docx

英语学习木质纤维的性能特点及其在工程中的应用1.docx

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英语学习木质纤维的性能特点及其在工程中的应用1

ArchitectureinJiangsu

2007

5

（generalNo.

115phase）

Fifty-four

PerformancecharacteristicsofwoodfiberanditsapplicationinEngineering

XuJing1,LiuJiaping1,2,ShiLin1

（1NanjingUniversityofTechnology;2JiangsuInstituteofArchitecturalScience,Nanjing,Jiangsu210008）

[Abstract]thewoodfiberastheasphaltmatrixmixture（SMA）stabilizer,withadsorptionandabsorptionofasphalt,increasetheviscosityofasphalt,increasethethicknessoftheasphaltmembrane

GaoLiqingpavementhightemperaturestability,lowtemperaturecrackresistanceandsoon.

[Keywords]woodfiber;asphaltconcrete;SMA

TU531.13[documentidentificationcode]B[articlenumber-6270]1005（2007）05-05-0054

PerformanceandApplicationofCelluloseTheFibers

JingXU1Jia-pingSHI2Lin1LIU

（1UniversityoftechnologyNanjing;2InstituteofJiangsuBuildingScienceNanjing,210008,）

Abstract:

fiberas,akindoffiberCelluloseusedstabilizersinstonemasticasphalt（SMA）,absorbasphaltcan,

Theviscosityofasphaltincreaseenhancethethicknessofasphaltfilmandincreasethestabilityinhightemperature

Theresistand-crackinlowtemperatureofasphaltroad.Theperformanceandengineeringapplicationofcellulosefiber

Beintroducedinthispaper.will

WordKey:

fibercellulose;concreteSMA;asphalt

0Preface

Withtherapiddevelopmentofeconomyandthesharpincreaseoftrafficvolume,the

Greenpavementperformancerequirementsarealsogettinghigherandhigher,conformtotheobjectiverequirementsoftwentiethCentury60

Inthe's,theGermansinventedthemasticasphaltstone,Jane.

SMA）pavement.SMAiscomposedofdiscontinuousgradationcoarseaggregate,asphalt,fiberstability

Agent,fillerandfineaggregatecomposition[1,2],whichpartofimportantstablefiber

Theagentismainlywoodfiber,alsohasasmallamountofasbestosfibersormineralfibers.wood

Qualityfiberisnon-toxic,tasteless,nonpolluting,nonradioactive,acidandalkalicorrosionresistance

Canbestable,highoilabsorptionrate,lowwatercontent,goodheatresistanceandeasytodisperseandsoon.

Atpresent,themostwidelyusedasphaltmatrixstabilizer,whichcanbeusedinthe

Athree-dimensionalnetworkofasphalt,improvetheviscosityofasphaltmixture,toincreasetheasphalt

Dosage,improvethehightemperaturestabilityandantislidingandotherfunctions,thusextendingtheLiQing

Servicelifeofpavement.

1Compositionofwoodfiber

Woodfiber,commonlyknownasligninfiber,andforeigncalledcellulose

Fiber,Germany'sRSJcompany'swoodfiberisdirectlyprocessedbythewood

Woodfiber,theUnitedStatesINTERFIBERandthedomesticproductionunitsaremainlyforeach

Apapermadeofwoodfiberprocessing.Nomatterhowtheproductionofrawmaterials,

Butintheend,thewoodfiberismadeupofcellulose,semicelluloseandwood.

Anaturalorganicpolymercompound,[3,asafillerorbinder,

4].

Nofcellulose（H10O5C6）,nisthenumberofrepeatedsugarunitsor

DegreeofpolymerizationofDP,theweightedaveragedegreeofpolymerizationofmostpaperfibersis600-

1500.ThestructureofthefiberisshowninFigure1,andtherepeatingunitisactuallytwo.

chart

Fig.1Structureofcellulose

Theanhydroglucoseunittogethercalledfibersugartwo

（H22O11C12）.combination

Polymerizationconnectionofcellulose

thechainisextended.

sofiberpoints

Thesubissuitabletobecombinedintolongchainsegments.

increasingthebindingstrength

Thisisthecellulose.

Reasonforhighstrength.

Semicelluloseisapolymeroffivedifferentsugars.

Glucose,GanLu

Sugar,galactose,xyloseandArabiasugar.Accordingtothedifferentplantvarieties

thesesugars

Avarietyofpolymerstructuresareformedintheformofavarietyof

someofwhicharerelatedtotheplantcellulose.

Lian

someofwhicharelinkedtolignin.

Ligninisthemainfunctionofthecompositionoftheintercellularlayer

Thisisthefiberbondingina

Intercellularsubstance.

Inaddition,ligninisalsofoundintheothersectionsofthefiber.wood

Qualityofthechemicalcompositionisverycomplex

anditsstructureismainly

[5,6]byPhenylpropanesstructure

Unitthroughtheetherbondandcarbon

Carbonbondisacomplex,amorphousthree

Dimensionalspacestructure

whichisdifficulttobehydrolyzedunderacidconditions.

The.

Themainmonomerissweetbeanalcohol

（coumaryalcohol）,coniferylalcohol

（alco2coniferyl

Hol）andSinapylalcohol

（alcoholSinapyl）.

[Epub

]2007206225

[theauthor

XuJing

Graduatestudent,NanjingUniversityofTechnology.

ArchitectureinJiangsu

2007

5

（generalNo.

115phase）

2technicalrequirementsandperformancecharacteristicsofwoodfiber

Thetechnicalstandardofwoodfiberisdifferentfromthatofothersyntheticfibers.

And,

Provisionsonthestrengthofthenon

butthesieveanalysis

oilabsorptionandheatresistanceandsoon.

Canmakerequests

itsspecifictechnicalindicatorssee

T/T533-2004Jand

GB/

T14336-93[7,8].

surface

1ligninfibertechnologyindex

Ordermeasurement

TechnicalrequirementsforUnitNo.

1fiberlength

<6.0mm

Pneumaticsieveanalysis

0.105mmscreenpassrate

%70+10

0.850mmscreenpassrate

%85+10

Two

Ordinarysieveanalysis

0.425mmscreenpassrate

%65+10

0.106mmscreenpassrate

%30+10

Theashcontentof3

%18+5

4pHvalue

7.5+1

P

Notlessthanfiber

strong

andtothepyridine

Ketonesandaromaticcompounds,theadsorptioncapacityisveryweakornot

Adsorbent

sothattheremainingpartoftheasphaltisnotaggregateadsorptionandbecomefree

Green.Last

Athightemperature

Theviscosityofasphaltissmall.

goodmobility

eveniftheoriginal

Theasphaltcomponents,suchascarboxylicacidsandthecompoundsoftheacidandthelike,havebeencollectedbytheaggregate.

Freeasphaltfromthesurfaceofaggregate.Pavementbleedingaffectsnotonlythesurfacebeauty

view

atthesametimetobringinconveniencetopedestrians.

Woodfiberduetoitsuniquestructure

fullabsorptionandadsorptionofasphalt

increase

Asphaltviscosity

improvethehightemperaturestabilityofasphalt.Woodfiberisakindofporous

Highsurfaceareamaterials

Itsspecificsurfacearea

[29]canbeashighas

11000gcm2/,while

Othersuchasglassfiber

Dolan,fiber

Thespecificsurfaceareaoftheslagfiberisonly

Twothousandandfivehundred

2/gcm2/~6000gcm,itcanabsorbthevariouscomponentsoftheabsorptionoftheasphalt

Pyridineclass

Ketonesandaromaticcompounds.

increasetheamountofasphalt

reducefreedom

Asphaltcontent

increasingtheviscosityofasphaltbinder

toreduceorpreventtheasphaltpavement

"

Weeping

"Theoccurrenceofthephenomenon.

Xielueneburgbasketmethodandleakagetestmethod

Canbecharacterizedbywoodfiber

5oilabsorptionrate%bodyweightof5times

6moisturecontent%<5

7heatresistance,210C,2h%

Color,volumebasis

Thereisnochange,heat

Weightlossisnotgreaterthan6%

Themainpropertiesofthewoodfiberareasbelow:

thelengthislessthan6mm,andthe

Curvestate;highoilabsorptionratecanreach7-9timesofitsownweight.

Theabsorptionandadsorptioncapacityofasphalt,butinthetwomethodsofthenetbasketmethod

Itismorescientifictocharacterizetheabsorptionoffibertoasphalt.TongjiUniversity,HuangPeng[30]andotherneedles

Testtheeffectofthefiberonthepitch,andtheresultsareshownintable2.

Table2adsorptioncapacityoffibertoasphalt

sample

Labeledmaterial

Adsorptioncapacityoffibertoasphalt

Testbefore140C160C170

Themainreasonisthatthestructureofthewoodfiberisdeterminedbythestructure.

Porousmaterialisakindofporousmaterial

thespecificsurfaceareaofupto

11000gcm2/;goodheatresistance

A.

SyntheticfiberssuchasPPfiberin

Hasbeenlostundertheconditionsof170degreesCelsius

Woodfiberisakindofnaturalpolymermaterial.

Temperature

Above200degreesCelsius

Canstillmaintainitsperformance

itshightemperatureresistance

[9,34,35]isverygood.

suitableforhightemperature

Useofasphaltconcrete.

3applicationandfunctionofligninfiber

Duetothehightemperatureinsummer,carload,waterandotherexternalcausesofthecomprehensive

Highwayasphaltpavementdamageisserious

invarioustypesofdamage

Rut

crack

Fractureandwaterdamagearethethreemostimportanttypesofdamage.

resultingintheresistanceofAsphaltPavement

Longsexdecrease.

Addacertainamountofwoodfiber

Theabsorptionandabsorptionoffiber,arrangedinacrisscrosspattern

FuLiqing

Toincreasetheamountofstructuralasphaltinthemixture.

reducingthefreeasphalt

Enhancetheviscosityofmastic

toimprovetheadhesionofasphaltbinderandaggregate

From.

Andtoprevent

"Weeping

"Toimprovethecrackresistance,waterresistanceandhightemperaturestability

etc.

soastoprolongthedurabilityofasphaltpavement.

Inthepresentpaper,thestabilizerofasphaltmatrixmixture

Most

-17[10,1833],-26areusingwoodfiber

Atthesametime,alsousedwoodfiber

Inotherareassuchasthermalinsulationmortar,gypsummaterial,rigidpolyurethanefoamplastics

[5]

Andnontirerubberproducts

[27,28].Inthispaper,wemainlyelaboratethe

Applicationandfunctioncharacteristicsofasphaltmixture.

3.1viscosityenhancement

"Weeping

"Itisacommondamagephenomenonofexpresswayasphaltpavement.

First

Lek.

Lowviscosityandhightemperaturestability

Especiallyinthesummerhightemperatureseason

Asphaltpavement

Pronetobleedingphenomenon.Se