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页数:19页
时间:2019-10-21
《道路工程材料(申爱琴版)-作业-集料&水泥(英文版)》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、实用标准AssignmentforRoadEngineeringMaterialsChapter1&Chapter2Name:Class:NO.:文案大全实用标准SCHOOLOFHIGHWAYCOLLEGECHANG’ANUNIVERSITYOCTOBER31,2013文案大全实用标准ChapteroneAggregate1.Herearetwokindsofstone,andthetestresultsareshowninfollowingtable.Whichkindofstonehasbetterperformance?Solution:Step1,theporosityo
2、fthesetwostonecanbecalculatedasthefollowingformula:n=1-ρdρt×100%AndthenA=0.07>nB=0.Step2,thevaluesaturation-watercoefficientofAstoneis0.75,whichishigherthantheBstone’s,0.65.Step3,thehigherporosityofstoneis,thebetterwaterabsorptiongetsandtheworsefrostresistanceis.Soisthesaturation-watercoeffic
3、ient.Fromwhathasbeenmentionedabove,thestoneAapparentlygetsahigherporosityofstoneandsaturation-watercoefficient,sothestoneAisworseatfrostresistance.Conclusion:stoneBhasbetterperformance.2.Pleasedescribethedifferencebetweenstrengthindexesofstoneandaggregate,andthetestmethods.Solution:a)Themajor
4、strengthindexforstoneisuniaxialcompressivestrength.TheresultofmeasuringuniaxialcompressivestrengthtestisrepresentedasresilientmodulusR=PAwithtriaxialchamberwithexternalLVDT’sandloadcell.Andthepreparesamplecanbecube(inroadengineering)orcylinder(inbridgeengineering).b)Themajorstrengthindexforag
5、gregateiscrushingvalue.Andthetestmethodisinthebelow.ProceduretodetermineAggregateCrushingValuei)Theaggregatespassingthrough12.5mmandretainedon10mmISSieveareoven-dried文案大全实用标准atatemperatureof100to110oCfor3to4hrs.ii)Thecylinderoftheapparatusisfilledin3layers,eachlayertampedwith25strokesofatampi
6、ngrod.iii)Theweightofaggregatesismeasured(Weight‘A’).iv)Thesurfaceoftheaggregatesisthenleveledandtheplungerinserted.Theapparatusisthenplacedinthecompressiontestingmachineandloadedatauniformratesoastoachieve40tloadin10minutes.Afterthis,theloadisreleased.v)Thesampleisthensievedthrougha2.36mmISS
7、ieveandthefractionpassingthroughthesieveisweighed(Weight‘B’).vi)Twotestsshouldbeconducted.Aggregatecrushingvalue=(B/A)x100%.1.PleasedescribetheclassificationofaggregatefromdeferentperspectivesSolution:Solution:Notification:Thereissomeothertyp
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