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.