大工13秋《建筑材料》在线作业1

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1、大工13秋《建筑材料》在线作业1Bigwork13autumn〃bu订dingmaterials^onlinehomework1Multiple-choicequestionsI.judgmentquestions(13questions,52pointsaltogether)1.thepresenceofexcessivelimeintheproductionoflimecanaffectthequalityoflimeproducts・A.errorB.correctDevelopingoptions

2、:B2.gypsumhydrationreferstohemihydrategypsumaddingwatertoproducetwogypsumprocess・A.errorB.correctDevelopingoptions:B3.amassof1.2kgofwetsand,afterdryingmassinto1.1kg,looseaccumulationvolumeof0.4L,thenitsdensityis2.75grams/cubiccentimeter・A.errorA.correctDe

3、velopingoptions:A1.・Whenlimeandwaterareagedandmaturelime,thevolumewillexpand・A.errorB.correctDevelopingoptions:B2.inordertoconsidertheeffectofvibrationorimpactloading,theductilityofthematerialwillbetakenintoconsiderationwhendesigningaseismicresistantstruc

4、ture・A.errorB.correctDevelopingoptions:B3.inordertopreventharmtosmallparticlesinthegypsum,needtogothrough"ChenFu〃treatmentbeforeuse・A.errorB.correctDevelopingoptions:A1.thetoughnessofthematerialisexpressedbytheenergyrequiredforthematerialtobedestroyedunde

5、rimpactorvibrationloading,andistestedbyimpacttest・A.errorB.correctDevelopingoptions:BThemaincomponentof8.slakedlimeiscalciumhydroxide,whichisalkaline・A.errorB.correctDevelopingoptions:B9.theapparentdensityofamaterialistheweightofaunitvolumeinabsolutedensi

6、ty・A.errorB.correctDevelopingoptions:A10.thebulkdensityofcrushedstoneisgenerallylessthanitsapparentdensity・A.errorB.correctDevelopingoptions:B9.constructiongypsumswellingcontractionsmal1.A.errorB.correctDevelopingoptions:B10.rigidcementitiousmaterialsarea

7、pplicablenotonlytothedryenvironmentontheground,butalsotothehumidenvironment・A.errorB.correctDevelopingoptions:A11.limeobtainedfromcalcinedrawmaterialwithaclaycontentoflessthan8%isahardlime・A.errorB.correctDevelopingoptions:ABigwork13autumn''buildingmateri

8、als"onlinehomework1Multiple-choicequestionsTwo,radioquestions(atotalof5questions,atotalof30points)1.ofthefollowingitemsthatdonotbelongtodurabilityare.A.frostresistanceB.weatheringresistanceC.crackresistanceD.chemica