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CONCRETEWATERPROOFING&DURABILITYTREATMENTS
Whatwearegoingtolearnabouttoday
• Anin-depthlookatthebuildingcoderequirementsforbasementwaterproofing• Ananalysisofmoisture,steelcorrosionandstructuralintegrity• Proactivewaterproofingdesigns• Thedifferentkindsofbasementtypesandtheadvantagesandchallengesofeachwhenwaterproofing• WarrantiesandQA- thingstolookoutfor.
THEBASEMENTCHALLENGE:• Thedemandforrealestateparticularlyinhighlypopulatedareas.• HighRisktakenonbyallstakeholders.• Relativelowcostoftheproject.• H&Sconcernsworkingbelowgrade.• Verydifficulttorepair.
CASESTUDY
2000sqmCANTERBURYUNIVERSITYBASEMENT,CHRISTCHURCH
In1997,theHydrogeltreatmentspray-appliedtoexistingbasementtosuccessfullyarrestmoistureingressandself-healmicrocracking.
Theremediationwascompletelysuccessful,andthebasement isinconstantuseasclassroomspaces.
10STMARKSAPARTMENTS,NEWMARKETThis2000sqm2leveldeepprecastconcretebasement,utilizestheMarkhamWaterproofingSystem,negatingtheneedforatankingmembranealtogether. Noleakingissuesreported.
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.
TYPESOFWATERPROOFINGMETHODS
WhatisaConcreteHydrogel?
• TreatingconcretewithacatalyticsilicainducestheformationofaHYDROGEL.• Spray-appliedorAdmixture• Hydrogeldoesnotintroduceorcreateanyelementnotalreadyintheconcrete.• Preventsthemovementofmoisture.
STOP MOISTURE MIGRATION = STOP CONCRETE PROBLEMS
MOISTURE migration in CONCRETE is the transport
system for deterioration & corrosion in concrete
INTEGRALWATERPROOFINGSYSTEMDESIGNAtripartitesystemconsistingofthefollowing:1. Aquron 300WaterproofingAdmixture2. Aquron 2000SurfaceApplication.3. Jointsealing&crackcontrol
WATERPROOFINGCASESTUDYWestfieldBroadway,AucklandNZBasementslabandcar-parkwaterproofing, oversensitiveretailareas.DesigninhousewithScentreGroupDHCEngineers, savingover$1milliondollarsforWestfield, comparedtotraditional tanking.
BASEMENTTYPESBEFORE AFTER
SECTION#1 SECTION#2
SECTION#1
SHOTCRETEDETAILPRECASTDETAIL
INSITUPOUREDDETAIL
SPECIFICATIONS&DESIGNWORK
Compatibilitywithothers.• Notintroducinganynewelementnotalreadyfoundinconcrete.• Completelycompatiblewith• Linemarking• Epoxycoatings• Floorcoveringadhesives• andanyproductdesignedforbareconcrete.
CrackControl:AProactiveApproach.
• Shrinkagereducingadmixturesandfibres.
• Weatherconditions.• Finishingandplacing• Poursizes/removingrestraint.
• GreenSaw-cuts,sequencing/sizes
• Adequatecover.• Goodcuring.
MEMBRANE HYDROGEL
CASESTUDY
2000sqmCANTERBURYUNIVERSITYBASEMENT,CHRISTCHURCH
In1997,theHydrogeltreatmentspray-appliedtoexistingbasementtosuccessfullyarrestmoistureingressandself-healmicrocracking.
Theremediationwascompletelysuccessful,andthebasement isinconstantuseasclassroomspaces.
WARRANTIES&QUALITIYASSURANCE
MARKHAMPEOPLE- BESURE
CONCLUSION:WHATHAVEWELEARNED?
• Buildingcoderequirements.• Ananalysisofmoistureinconcrete• DifferentWaterproofingmethodsincludingtheMarkham
Waterproofingsolution.• Thedifferentkindsofbasementtypes.• CrackControl.• WarrantiesandQA- thingstolookoutfor.