Masonry Exam 1 Questions And Answers

Masonry Exam 1 Questions And
Answers
4fbasicfstepsfinfmakingfCMU:f-fCORRECTffANSWER-
mixing,fmolding,fcuring,fandfcubing;fCMUfmixfhasfzerofslump

5fKeyfCharacteristicsfoffGothicfArchitecturef-fCORRECTffANSWER-
pointedfarches,flargefstained-glassfwindows,fgargoyles,fflyingfbuttresses,fribbedfvaults

admixturesfforfgroutf-fCORRECTffANSWER-•Limef-
fincreasefworkabilityfandfwaterfretention

•Bentonitef-fincreasefwaterfretention
•Flyfashf-fisfmorefeconomicalfthanfPortlandfcement
-improvesfpumpability
-strengthfgainfoffgroutfmayfbefslowerfthanfPortlandfcement.
-15-40%fbyfweightfoffPortlandfcement
•ProprietaryfAdmixture:faluminumfpowder,fplasticizer,fandfwaterfretentionfagent.
-Minimizedftendencyfforfseparationfandfvoids
-Reducesfdryingfshrinking
•Superplasticizersf-fprovidefadditionalfworkability,fbutfmaintainfwaterftofcementfratio.
•Anti-ShrinkingfAgentsf-factfasfexpandingfagent.
•Acceleratorsf-ftofhastenfgroutfsetftimefduringfcoldfweather.
•Retardersf-ftofdelayfgroutfsetftimefduringfhotfweather

anchorsf-fCORRECTffANSWER-Transmitflargefaxialfforcesfandfshearfforcesfatfsupports

ASTMfA615fandfA996f-fCORRECTffANSWER-
usedfforfsteelfreinforcementfinfmasonryf(CMU)

615-coverfreinforcingfsteelfmanufacturedffromfbilletfsteel
996-manufacturedffromfrailf&faxlefsteel

ASTMfC216f-fCORRECTffANSWER-
StandardfforfFacingfBrickf(mostfprevalentfstandardfforfclayfmasonryfunits)fwithfthreeftypes:f
FBSfforfstandard,fFBXfforfextra-lessfpermissablefsizefvariation,fandfFBAfforfarchitectural-
usedfwhenflookfisfnonuniformfinftextureforfsize

, ASTMfC270f-fCORRECTffANSWER-
StandardfSpecificationfforfMortarfforfUnitfMasonryfinf3fsystems:
-cementflimefakafportlandflimefakafportlandfcementf(PLC)fmortar
-masonryfcementfmortar
-mortarfcementfmortar

ASTMfC476f-fCORRECTffANSWER-Standardfspecificationfforfgroutfforfmasonry

ASTMfC62f-fCORRECTffANSWER-Buildingfbrick-
fgeneralfclayfbrickfusedfasfstructuralfmaterial




ASTMfC90f-fCORRECTffANSWER-Standardfspecfforfload-
bearingfconcretefunitsf(designedftofholdfmorefthanf200plf);fdelineatesfweightfclassificationsf
basedfonfdensity:
lightweightf(<105fpcf)
mediumfweightf(105-124.99fpcf)
normalfweightf(125pcf<)

ASTMfC91f-fCORRECTffANSWER-
measuresfairfcontentf%fbyfvolumefusingfpressurefmethod;fimportantfforfdurabilityfandfwork
ability

barrierfwallsf-fCORRECTffANSWER-resistfwaterfpenetrationfbyfvirtuefofftheirfthickness-
fcanfbefsingleforfmultifwythe




bedfjointf-fCORRECTffANSWER-
thefhorizontalflayerfoffmasonryfonfwhichfmasonryfunitfisflaidf(betweenfeachfcoursefakafrun)

buildingfenvelopef-fCORRECTffANSWER-
thefphysicalfseparatorfbetweenfthefinteriorfandfthefexteriorfenvironmentsfoffafbuilding

calculatingfquantityfoffunitsf-fCORRECTffANSWER-
volumefoffwall/fvolumefoffonefunitf=f#foffunits

cleanoutsf-fCORRECTffANSWER-
facefoffstretcherfunitfomittedfsomewhereftofpreventfblockagefbyfgroutfandfprovidefvisibilityfo
ffreinforcement-fthisfisfrequiredfforfhighfliftsfakafmulti-lifts

CMU-ConcretefMasonryfUnitf-fCORRECTffANSWER-
afbuildingfunitforfblockflargerfinfsizefthanf4"x4"x12"fmadefoffcementfandfsuitablefaggregates;
perfNCMA:fHollowforfsolidfmasonryfunit,fmanufacturedfusingflowffrequency,fhighfamplitudef
vibrationftofconsolidatefconcretefoffstiffforfextremelyfdryfconsistency

coatingsf-fCORRECTffANSWER-includefpaintsfandfwater-
repellentf(filmfforming,fpenetrating,fandfintegral)fcoatings