欢迎来到天天文库
浏览记录
ID:51819047
大小:702.13 KB
页数:13页
时间:2020-03-16
《道路工程材料(申爱琴版)-作业-集料水泥(英文版).docx》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、AssignmentforRoadEngineeringMaterialsChapter1&Chapter2Name:Class:NO.:SCHOOLOFHIGHWAYCOLLEGECHANG’ANUNIVERSITYOCTOBER31,2013ChapteroneAggregate1.Herearetwokindsofstone,andthetestresultsareshowninfollowingtable.Whichkindofstonehasbetterperformance?Solution:Step1,thep
2、orosityofthesetwostonecanbecalculatedasthefollowingformula:n=1-ρdρt×100%AndthenA=0.07>nB=0.Step2,thevaluesaturation-watercoefficientofAstoneis0.75,whichishigherthantheBstone’s,0.65.Step3,thehigherporosityofstoneis,thebetterwaterabsorptiongetsandtheworsefrostresista
3、nceis.Soisthesaturation-watercoefficient.Fromwhathasbeenmentionedabove,thestoneAapparentlygetsahigherporosityofstoneandsaturation-watercoefficient,sothestoneAisworseatfrostresistance.Conclusion:stoneBhasbetterperformance.2.Pleasedescribethedifferencebetweenstrength
4、indexesofstoneandaggregate,andthetestmethods.Solution:a)Themajorstrengthindexforstoneisuniaxialcompressivestrength.TheresultofmeasuringuniaxialcompressivestrengthtestisrepresentedasresilientmodulusR=PAwithtriaxialchamberwithexternalLVDT’sandloadcell.Andthepreparesa
5、mplecanbecube(inroadengineering)orcylinder(inbridgeengineering).b)Themajorstrengthindexforaggregateiscrushingvalue.Andthetestmethodisinthebelow.ProceduretodetermineAggregateCrushingValuei)Theaggregatespassingthrough12.5mmandretainedon10mmISSieveareoven-driedatatemp
6、eratureof100to110oCfor3to4hrs.ii)Thecylinderoftheapparatusisfilledin3layers,eachlayertampedwith25strokesofatampingrod.iii)Theweightofaggregatesismeasured(Weight‘A’).iv)Thesurfaceoftheaggregatesisthenleveledandtheplungerinserted.Theapparatusisthenplacedinthecompress
7、iontestingmachineandloadedatauniformratesoastoachieve40tloadin10minutes.Afterthis,theloadisreleased.v)Thesampleisthensievedthrougha2.36mmISSieveandthefractionpassingthroughthesieveisweighed(Weight‘B’).vi)Twotestsshouldbeconducted.Aggregatecrushingvalue=(B/A)x100%.1
8、.PleasedescribetheclassificationofaggregatefromdeferentperspectivesSolution:Solution:Notification:Thereissomeothertypesofaggregatebydifferentstan
此文档下载收益归作者所有