CONCRETE WATERPROOFING & DURABILITY TREATMENTS · 2019-10-22 · In 1997, the Hydrogel treatment...
Transcript of CONCRETE WATERPROOFING & DURABILITY TREATMENTS · 2019-10-22 · In 1997, the Hydrogel treatment...
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CONCRETEWATERPROOFING&DURABILITYTREATMENTS
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Whatwearegoingtolearnabouttoday
• Anin-depthlookatthebuildingcoderequirementsforbasementwaterproofing• Ananalysisofmoisture,steelcorrosionandstructuralintegrity• Proactivewaterproofingdesigns• Thedifferentkindsofbasementtypesandtheadvantagesandchallengesofeachwhenwaterproofing• WarrantiesandQA- thingstolookoutfor.
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THEBASEMENTCHALLENGE:• Thedemandforrealestateparticularlyinhighlypopulatedareas.• HighRisktakenonbyallstakeholders.• Relativelowcostoftheproject.• H&Sconcernsworkingbelowgrade.• Verydifficulttorepair.
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CASESTUDY
2000sqmCANTERBURYUNIVERSITYBASEMENT,CHRISTCHURCH
In1997,theHydrogeltreatmentspray-appliedtoexistingbasementtosuccessfullyarrestmoistureingressandself-healmicrocracking.
Theremediationwascompletelysuccessful,andthebasement isinconstantuseasclassroomspaces.
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10STMARKSAPARTMENTS,NEWMARKETThis2000sqm2leveldeepprecastconcretebasement,utilizestheMarkhamWaterproofingSystem,negatingtheneedforatankingmembranealtogether. Noleakingissuesreported.
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WATERPROOFINGSTANDARDS
• TheEnglishStandardvstheNewZealandstandard.• Wetwallsor‘FreeDrainingsystems’
1 2 3 4
Car parking; plantrooms. Workshops and plantrooms requiring
drier environment;retailstorage areas
Ventilated residential andworking areas.
including offices,restaurants,leisurecentres,etc.
Archivesandstoresrequiring
controlled environment
Someseepageand damppatchestolerable.
No waterpenetration but moisture v
apourtolerable.
Dry environment. Totallydry environment.
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TYPESOFWATERPROOFINGMETHODS
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WhatisaConcreteHydrogel?
• TreatingconcretewithacatalyticsilicainducestheformationofaHYDROGEL.• Spray-appliedorAdmixture• Hydrogeldoesnotintroduceorcreateanyelementnotalreadyintheconcrete.• Preventsthemovementofmoisture.
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STOP MOISTURE MIGRATION = STOP CONCRETE PROBLEMS
MOISTURE migration in CONCRETE is the transport
system for deterioration & corrosion in concrete
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INTEGRALWATERPROOFINGSYSTEMDESIGNAtripartitesystemconsistingofthefollowing:1. Aquron 300WaterproofingAdmixture2. Aquron 2000SurfaceApplication.3. Jointsealing&crackcontrol
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WATERPROOFINGCASESTUDYWestfieldBroadway,AucklandNZBasementslabandcar-parkwaterproofing, oversensitiveretailareas.DesigninhousewithScentreGroupDHCEngineers, savingover$1milliondollarsforWestfield, comparedtotraditional tanking.
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BASEMENTTYPESBEFORE AFTER
SECTION#1 SECTION#2
SECTION#1
SHOTCRETEDETAILPRECASTDETAIL
INSITUPOUREDDETAIL
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SPECIFICATIONS&DESIGNWORK
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Compatibilitywithothers.• Notintroducinganynewelementnotalreadyfoundinconcrete.• Completelycompatiblewith• Linemarking• Epoxycoatings• Floorcoveringadhesives• andanyproductdesignedforbareconcrete.
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CrackControl:AProactiveApproach.
• Shrinkagereducingadmixturesandfibres.
• Weatherconditions.• Finishingandplacing• Poursizes/removingrestraint.
• GreenSaw-cuts,sequencing/sizes
• Adequatecover.• Goodcuring.
MEMBRANE HYDROGEL
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CASESTUDY
2000sqmCANTERBURYUNIVERSITYBASEMENT,CHRISTCHURCH
In1997,theHydrogeltreatmentspray-appliedtoexistingbasementtosuccessfullyarrestmoistureingressandself-healmicrocracking.
Theremediationwascompletelysuccessful,andthebasement isinconstantuseasclassroomspaces.
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WARRANTIES&QUALITIYASSURANCE
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MARKHAMPEOPLE- BESURE
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CONCLUSION:WHATHAVEWELEARNED?
• Buildingcoderequirements.• Ananalysisofmoistureinconcrete• DifferentWaterproofingmethodsincludingtheMarkham
Waterproofingsolution.• Thedifferentkindsofbasementtypes.• CrackControl.• WarrantiesandQA- thingstolookoutfor.