摊铺机熨平板中英文对照外文翻译文献.docx
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摊铺机熨平板中英文对照外文翻译文献.docx
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摊铺机熨平板中英文对照外文翻译文献
中英文资料翻译
Paverscreed
1.1FunctionFulfilledbytheScreed
Thescreed,theroadpaver‘sworkingtool,fulfilsthefunctionofuniformlycompactingthepavingmaterialacrosstheentirepavewidthandproducingaclose-texturedandlevelsurface.Thescreed‘scompactingsystemsshallpre-compactthemixtothegreatestpossibleextent.Thisistominimizetheinfluenceoflayerthicknessupontheamountofsubsequentcompactionbyrollingwhenbringingaboutthepavement’sfinaldensity.
Forpre-compaction,differentcompactingsystemsareavailable:
T=Tamper(aneccentricshaftcausesthetamperbartomoveupanddown)
V=Vibrators(vibrationsaregeneratedbyaneccentricshaftactingonthescreedplatesatrightanglestothedirectionofmotion)
P=PressureBar(s)(thepressurebar(s)arehydraulicallypressedontothemixatafrequencyof68Hz(approx.)andamaximumpressureof130bar)
P1=Screedequippedwith1PressureBar
P2=Screedequippedwith2PressureBar
1.2ExtendingScreedsandBolt-onExtensions
ForallVOGELEscreeds,bolt-onextensionsareavailable.TheVOGELEsystemofbolt-onextensionsallowstoeasilyandsturdilybuildupscreedstoanypavewidthdesired.Evenwhenpavinginlargewidths,VOGELEscreedsworkwithhighestprecisionandachievesuperbdegreesofuniformdensityrightuptothepavementedges.Whenfittingbolt-onextensions,caremustbetakentoensurethatthebottomedgeofthescreedplateisflushwiththeadjacentunits,otherwiseastepmaybeproducedinthepavementorthescreedplanninganglemaychange.Duringthepavingprocess,thiscanhaveanegativeeffectonpre-compaction,surfacestructureandfloatingbehaviourofthescreed.
1.3Set-UpoftheExtendingScreed
1.Positionbothextendingunitsinplacesothatthescreedplateofthebasicunitandthescreedplatesoftheextendingunitsareroughlylevel.
2.Slackenthechainsconnectingthespindlesontheextendingunitsothateachspindlecanbeadjustedindependently.
3.Carefullylowerthescreedontotheextendingunits.Timbershouldbeplacedunderthemiddleofthetwoextendingunits.
4.Nowadjustthescreedplanningangleviathetowpointramssothatthescreedplaterestsonthetimber.
5.Removethelockingscrewfromthethreadedbushonallspindles.
6.Adjustallthreadedbushes.
7.Refitthelockingscrews.
8.Raisethescreedandsecureitsothatitcannotsink.
9.Layaruleralongtheinnerandouterspindlepairsandthenadjusttheheightoftheextendingunitviathefrontandrearspindleswiththeaidofaspecialwrench,sothatthescreedplateofthebasicunitislevelwiththetrailingedgeoftheextendingunit.Nowadjusttheplanningangleoftheextendingunitviathefrontspindle.
10.Reconnectthespindlepairswiththechains.
11.Raisetheframeoftheextendingunitbyapprox.4mmsothatitroughlycorrespondstotheplanningangleofthescreed.
12.Duringthefirston-sitejob,theheightoftheextendingunitsmustbecorrecteduntilalongitudinalstepisnolongervisible.
1.4Fixed-WidthScreeds
1.4.1CompactingSystemsInstalledinFixed-WidthScreeds
TV=TamperandVibrators
Installedin:
-SB250-SB300
Recommendedfor:
-Allconventionalmixes.
-Materialswhichareeasytocompactorthinnerpavementlayers.
-Jobswherepavingcanbedoneinalargelyconstantwidth.
-Largeradii.
TP2=Tamperand2PressureBars
Installedin:
-SB250(andHydraulicBolt-onExtensions)
-SB300(andHydraulicBolt-onExtensions)
Recommendedfor:
-Allconventionalmixes.
-AscreedinTP2versionachievesahighpre-compactionevenofthickpavementlayers.
-Mixeswhicharedifficulttocompactonaccountoftheirgrainshapeandconsistency.
-Jobswherepavingcanbedoneinalargelyconstantwidth.
-Largeradii.
-Lesseffortrequiredforsubsequentcompactionbyrolling.
TP1=Tamperand1PressureBar
Installedin:
-SB250(andHydraulicBolt-onExtensions)
-SB300(andHydraulicBolt-onExtensions)Recommendedfor:
-Allconventionalmixes.
-Pre-compactionbyascreedinTP1versionishigherthanbyaTVscreed,butlowerthanbyascreedinTP2version.
-Jobswherepavingcanbedoneinalargelyconstantwidth.
-Largeradii.
-Lesseffortrequiredforsubsequentcompactionbyrolling.
TVP2=Tamper,Vibratorsand2PressureBars
Installedin:
-SB250-SB300-SB250B
Recommendedfor:
-Jobswherepavingcanbedoneinalargelyconstantpavewidth.
-Largeradii.
-SB250,SB300:
Allconventionalmixes.
-SB250B:
ForpavingPCC?
asthistypeofjobdoesnotincludesubsequentcompactionbyrolling.
1.4.2Fixed-WidthScreedsandBolt-onExtensions
Asageneralrule,bolt-onextensionsshouldbefittedsymmetricallyonbothsidesofthescreed,whereverpossible.TheadvantageofaFixed-WidthScreedisadeeperscreedplateof500mmcomparedtoascreedplateof250mmfoundonExtendingScreeds.Thishasapositiveeffectuponthescreed‘sfloatingbehaviour.
Moreover,theleadingedgeoftheFixed-WidthScreedformsasinglelineovertheentirepavewidthanddifferentplanninganglesdonotleavemarksinthepavement.Fixed-WidthScreedsarecapableofhandlingconsiderablylargerpavewidthsthanExtendingScreeds,albeitwithrestrictionsasregardsthescreed‘svariability.Asaresult,Fixed-WidthScreedsareparticularlysuitedtopavinglongsectionswithalarge,unchangingpavewidth.
1.4.3BuildingUpaFixed-WidthScreedwithBolt-onExtensions
Bolt-onextensionsarefittedtoenlargethescreed’swidth.Thetrailingedgesofthescreedplatesshallbeflushacrosstheentirepavewidth.Theleadingedgesofthescreedplatesshouldbesethighertowardstheoutsidebyroughly0.5mm.
Inordertopreventthebolt-onextensionsfrombendingtowardstherearasaresultofthepressureexertedbythemix,horizontalbracesmustbefitted.
Horizontalbracesaretobefittedinsuchawaythatthetrailingedgesofthescreedplatesareflush.
Tocompensatetheupliftattheouteredgesofthescreed,thereshouldbealightsagofthescreedwhenraised.Themagnitudeofthissagdependsonthepavewidth.Thesagcanbeadjustedbywayofthebracesoverthescreed’sbasicunit.
1.5Set-UpofTamper
Thetampershallbesettoanidenticalstrokelengthacrosstheentirepavewidth.Thesettingcanbechangedbysimplyturningtheeccentricbushontheshaftdrivingthetamperbar.Thedrivingshaftisaccessiblefrombehind,sothatthiscaneasilybedonebetweenjobsitesections.Adjustingthelowerreversalpointofthetamperbar,however,takesmoretime.First,thetampershieldsneeddemounting.Thenremovethescrewsonallshaftbrackets.Afterlooseningthelockingnut
(2),thetamperbarcanbeadjustedviabolt
(1).Theheighttobesetdependsonthetamperstrokeselected.
1.6Set-UpofTamperShield
Thetamper(3)mustbesetsothatitrestsonthewearstrip
(1)acrossthefullwidth.Thenadjustthespringsteelbar
(2)onthetampershieldbymeansofscrew(4)fromtherearofthescreeduntilagapof0.5-1mmisobtainedbetweentamperbarandthespringsteelbar.Releasescrews(6)andfitvarioussmallshims(5)toalignthetampershield.Withthetampershieldcorrectlyaligned,thespringsteelbar
(2)isatleastparallelwiththetamperorpreferablyinclinedslightlytothefront.Checktheclearancebetweentamperandspringsteelbarandcorrect,ifnecessary.
Tip!
Atastrokelengthof2mm,thetamperbarshouldbeflushwiththescreedplate
(checkwithyourhand).
1.7Set-UpofPressureBar(s)
1.Unscrewthenut
(2)withanti-twistdevice(3)onthehydraulicram
(1)forthepressurebar.
2.Turnthehydraulicram
(1)toadjusttheheightofthepressurebar.Theclearance(7)betweenpressurebarandbottomedgeofthescreedplateshouldbeatleast4mm.
3.Checkthatthehydraulicramforthepressurebarmakescontactwithmetalplate(5)whenretracted.
4.Setpre-tensionofspring(6)to5.5mmvianut(4)toyieldadistance(8)of59.5mm.
5.Resecurethehydraulicram(3)forthepressurebar.
1.8BevelIrons
Bevelironsshapeandcompacttheedgesofthepavement.Theyareavailablewithabeveledgeof45°and60°.Theirsizedependsonthethicknessofthelayertobepaved.Aheatingrodcanbeinstalledasanoptiontoimprovetheslidingpropertiesofthebeveliron.
1.9FunctionCheckofScreedHeating
Allscreedcomponentsincontactwiththehotmixshouldbeheatedtoapprox.90°Cbeforestartingwork.Itisrecommendedtoprotectthescreedagainstexcessivelossofheattothesurroundingssothattheheatingpowercanbeutilizedeffectively,forinstancebyputtingdownthescreed,preferablyonhotmix.Asphaltmaysticktothetamperbar,screedplatesorpressurebar(s)ifthescreedtemperatureistoolow.Thiscanleadtotheformationofstripsandanirregularsurfacetexture.Thefloatingbehaviourofthescreedmayvarybeforeitreachesitsoperatingtemperature,withtheresultthatlayerthicknessmayalsovaryanddeviatefromthedesiredone.Forthe“dash2“machines,amonitoringunitforscreedheatingisavailableasanoptionalextra.Thisfeaturemonitorseachsingleheatingrodforproperfunctionandindicatesanyfaultwithoutdelay.
Shouldoneofthegreenindicatorlightsextinguishoveraprolongedperiodoftime,thenthereasonmaybe:
nPoorinsulation
nAsymmetricalpowerconsumption
nGeneratortemperaturetoohigh
Tip!
Directlyafterswitchingonscreedheating,correctoperationoftheheatingrodscanbecheckedbycautiouslytouchingthetamperbar,screedplatesandpressurebar(s).
Advantage:
Afailureofheatingrodsisdetectedimmediately.Newpartscanbeprocuredwithout
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