地基與基礎(chǔ)—水泥砂漿防水層

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1、地基與基礎(chǔ)—水泥砂漿防水層(1)preparationforconstruction1,materials(1)cement:use325ordinaryportlandcement,expansioncementorslagPortlandcement.IncaseofcorrosivemediaactionshouldbeSelectionaccordingtodesignrequirements.(2)sand:theuseofmediumsand,shallnotcontaindebris,inc

2、ludingmudshallnotexceed3%,theparticlesizegreaterthan3mmofsandshouldbescreenedbeforeuse.(3)admixture:usewaterreducingagent,earlystrengthagentandotheradmixture,addorganosiliconwaterproofagentandwaterglassgypsumwaterproofaccelerator.2,operatingconditions(1)t

3、hebasementreservedholesanddrainagepipeinstallation,andforconcealedacceptanceprocedures.(2)thesurfaceofthebaseshouldbesmooth,solid,roughandclean,rigidmultilayer(fivelayermethod),cementmortarwaterprooflayerrequiresfullsurfaceMoistwithoutwater.Concretewall,g

4、round,suchashoneycombandloose,toberemoved,afterpouringbelt,constructionjointsshouldbecuthair,washedcleanwithwater.Firstcoatedwithcementpaste(1:1cementmortar10%107gluethincoatinglayer)isalayerof2mm,andthenuse1:3cementmortaror1:2hardThecementmortariscompact

5、edandthesurfacehasoil.Cleanwith10%concentrationcausticsoda(sodiumhydroxide)solution.(3)withwaterprooflayermixedmortarmasonrybrick,brickrowmustbeintheseamdepthof8~10mm.(4)embeddedparts,preburiedpipelinesexposedatthegrassrootslevelmustbearoundthetick20~30mm

6、wideand50~60mmdeeptrench,1:2Dryhardcementmortarcompaction.(5)concretebasetreatment;1)thenewconcreteproject,shouldbemadeofroughsurface,immediatelyafterstrippingthewirebrush,brushthesurfaceofwoolblendedcoagulationandsmooth.Wipebeforewateringwashedclean.2)th

7、eoldconcretefilldowaterprooflayer,adrill,chisel,wirebrushsurfaceroughening,drycleaningandthenrushedthewholeWater,scrubclean.3)thesurfaceisunevenandthehoneycombholesshallbetreatedseparatelyaccordingtodifferentconditions.4)theconstructionjointsoftheconcrete

8、structureshallbelabeledas"V"shapedtroughalongtheseam.Afterwashingwithwater,themortarshallbewashedwithlimeThebottomandcementmortararecompactedanddried.Thegroovedepthisabout10mm,about25mmwide.(6)brickmasonrybasetreatm