土木专业毕业英语翻译论文.docx

土木专业毕业英语翻译论文.docx

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土木专业毕业英语翻译论文

Abstract

Themajorityofabandonedlimestonepowderwastes（LPW）andwoodsawdustwastes（WSW）isaccumulatedfromthecountriesallovertheworldandcausescertainseriousenvironmentalproblemsandhealthhazards.ThispaperpresentsaparametricexperimentalstudywhichinvestigatesthepotentialuseofWSW–LPWcombinationforproducingalow-costandlightweightcompositeasabuildingmaterial.Someofthephysicalandmechanicalpropertiesofconcrete

mixeshavinghighlevelofWSWandLPWareinvestigated.Theobtainedcompressivestrength,flexuralstrength,unitweight,ultrasonicpulsevelocity（UPV）andwaterabsorptionvaluessatisfytherelevantinternationalstandards.Theresultsshowthattheeffectofhigh-levelreplacementofWSWwithLPWdoesnotexhibitasuddenbrittlefractureevenbeyondthefailureloads,indicateshighenergyabsorptioncapacity,reducestheunitweightdramaticallyandintroducessmothersurfacecomparedtothecurrent

concrete

bricksinthemarket.Itshowsapotentialtobeusedforwalls,woodenboardsubstitute,economicallyalternativetothe

concrete

blocks,ceilingpanels,soundbarrierpanels,etc.

Keywords:

Wood;Limestone;Cement;Waste;Brick;Masonry

ArticleOutline

1.Introduction

2.Experimentalprogram

2.1.Materials

2.2.Mixingandfabricationofbricks

2.3.Testmethods

3.Testresultsanddiscussion

3.1.Waterabsorptionandunitweight

3.2.Compressivestrength

3.3.Flexuralstrength

3.4.DirectUPVmeasurement

4.Conclusions

References

1.Introduction

Sincethelargedemandhasbeenplacedonbuildingmaterialindustryespeciallyinthelastdecadeowingtotheincreasingpopulationwhichcausesachronicshortageofbuildingmaterials,thecivilengineershavebeenchallengedtoconverttheindustrialwastestousefulbuildingandconstructionmaterials.Accumulatingofunmanagedwastesespeciallyindevelopingcountrieshasresultedinanincreasingenvironmentalconcern.Recyclingofsuchwastesasbuildingmaterialsappearstobeviablesolutionnotonlytosuchpollutionproblembutalsototheproblemofeconomicdesignofbuildings.Theincreaseinthepopularityofusingenvironmentallyfriendly,low-costandlightweightconstructionmaterialsinbuildingindustryhasbroughtabouttheneedtoinvestigatehowthiscanbeachievedbybenefitingtotheenvironmentaswellasmaintainingthematerialrequirementsaffirmedinthestandards.

Manypreviousresearches[1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12],[13],[14]and[15]undertakenobtainedvaluableresultstousetheindustrialwastesinvariousformsofconcreteproduction.Forinstance,theuseofwasterubber,glasspowderandpaperwastesludgeinconcretemixhasreceivedconscribeattentionoverthepastyears.Someresearchescarriedoutinthepastusedwoodashwastesasareplacementforcementinconcretemixes[1]and[2].Althoughtheseresearchesareprovidingencouragingresults,theconcretemixeshavingbothwoodsawdustwastes（WSW）andlimestonepowderwastes（LPW）combinationhithertohasnotbeeninvestigated.Thesewastesutilizedinthisresearcharewidelyavailableinlargeamountfromtheforestandlimestoneindustries.ThispaperpresentssomephysicalandmechanicalpropertiesoftheconcretemixeshavinghighlevelofWSWandLPWasareplacementforaggregate.

Mostofthewastesusedinthisresearcharecurrentlydisposedinsanitarylandfillsoropen-dumpedintouncontrolledwastepitsandopenareas.AperennialdilemmafortheindustrieshasbeendisposalofWSWandLPWgenerated.ThispredicamentisnotuniquetoTurkeyortheUnitedStates.Thisisaworld-wideenergylossandenvironmentaldisposalproblem.Disposalofthisproductwasteisamajorproblemforthemanysmallbusinesses.Therefore,theacceptablesolutionofthisproblemwithacommercialvalueiscrucial.

Thephysicalandchemicalpropertiesofwooddustvarysignificantlydependingonmanyfactorssuchasgeographicallocationandindustrialprocesses.Hardwoodsusuallyproducemoredustthansoftwoods,andthebarkandleavesgenerallyproducemorewooddustthantheinnerwoodpartsofthetree.Onaverage,thewoodsawingresultsin5–10%dust.Currently,theblocksoflimestoneareextractedviachainsaw,diamondwireanddiamondsawsfromquarriesandthentheblocksarecutintosmallersuitablesizestobeusedasbuildingmaterial[6].Theprocessinglimestonewhichincludescrashedlimestoneproduction,resultsinapproximately20%LPW.TheestimatedLPWof21.2milliontonesintheUK,18milliontonesinGreeceand30milliontonesinTurkeyisreported[5]and[6].DisposalofLPWcausesdust,environmentalproblemandpollutionbecauseofitsfinenature.Itcontaminatestheairwiththestormsinthesummerandspringseasonsandthereforecausesserioushealthhazardsincludings