Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on...

109
Twenty-First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter: Matt Dupuis PhD PE SRI Middleton, WI August 1, 2017

Transcript of Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on...

Page 1: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Twenty-FirstAnnualWestfordSymposiumonBuildingScience

Westford,MA

VaporBarriersInCompactRoofAssemblies

Presenter:MattDupuisPhDPESRIMiddleton,WI

August1,2017

Page 2: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Topics

• ProblemStatements• ConcreteBasics• ConcreteandMoisture• FieldExamples• Research• Recommendations• Questions

Page 3: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ProblemStatements

• Theroofingindustryhasseenadramaticincreaseinmoisturerelatedfailuresfromroofingoverconcreteroofdecks,bothnewconstructionandreroofs.• ThecompressedschedulesinnewconstructionhaveseenGeneralContractorsdirect(demand)theinstallationovergreenconcrete,afteronlydays.• MostabsurdreporttoSRIwas3days!• Materialsandtechniquesforinstallingroofshaschangedfocusingonlaborefficiencyandenvironmentalfriendlyfactors

Page 4: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ProblemStatements

• Theroofingindustryhaslittletonoguidanceontheacceptanceoftheconcretesubstrateassuitabletobegininstallingaroofsystem.• TheguidancethatdoesexistforindirecttestingofroofdecksistypicallylegacyspecificationlanguagetracingitsoriginstobeforeIwasborn

Page 5: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BasicsofConcrete

Page 6: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BasicsofConcrete

•PortlandCementisnotconcrete• PortlandCementisthebindingagent• Concreteisthecompositematerial• Aggregates• Coarse40%-50%byvolume• Fine20%- 30%byvolume

• PortlandCement15%-20%byvolume• Water15%-20%byvolume• Additional“adds”typically<1%

Page 7: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BasicsofConcrete• Additionalcomponents

• Fibers• Accelerators• Retarders• Water reducers• Air entrainment• Fly Ash• Silica Fume• Waterproofing• Magic Pixie Dust

Page 8: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BasicsofConcrete

• ProductionofConcrete• Eachbatchplantwillhavehundredsoreventhousandsofrecipes• Basedonlocalaggregatesandconditions• Requirementsoforderdictatewhichonetheyuse• Developedovertime• Scienceandtrial&error

• Formsforroofdecks• Strippableforms• Steelformdeck

Page 9: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 10: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 11: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 12: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 13: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 14: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

CuringofConcrete

• Note wearediscussingcuringnotdrying• Chemicalprocessofhydration• Allaboutcompressivestrengthgain• Lossofmoistureduringthisprocesscanhaveadverseeffects• Moistcure• Protectfromfreezing

Page 15: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

CuringofConcrete

• StructuralEngineerspecifiedstrength• Typicallyspecifiedat28-daycompressivestrength• i.e.5000psiat28days

• 28-dayshasnothingtodowithmoisturecontentonlycompressivestrength

Page 16: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

Page 17: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

FactorsThatAffectDrying

• Climacticconditions• Concretesurfacecondition• Rewettingofconcrete• Rain,snow,ice,condensate

• Capillaryclosure

Page 18: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• EffectsofCuringandDryingEnvironmentsonSplittingandTensileStrengthofConcrete• J.AHanson• 1968

Page 19: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

EffectsofCuringandDryingEnvironmentsonSplittingandTensileStrengthofConcrete- Hanson

Page 20: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

<3)+%.*#,)$,?3$:*#%#

1&##5*D6"@*+#BK*c*6%#*L)I*4"I.%:

1&##5*+#BK

Page 21: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

<3)+%.*#,)$,?3$:*#%#1&##5*D6"@*+#BK*c*6%#*L)I*4"I.%:

de)-6"*2#&)"4#"*c*@6.$&,"#*4.$&".?,&.6%

1&##5*+#BK

e)-6"*2#&)"4#"

Page 22: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

<3)+%.*#,)$,?3$:*#%#1&".--#4*H6"@$*c*<*L)I*4"I.%:

Page 23: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

<3)+%.*#,)$,?3$:*#%#1&".--#4*D6"@$*c*GL6*L)I*4"I.%:

de)-6"*2#&)"4#"*c*6%#*L)I*4"I.%:

Page 24: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Howdowemeasuremoisturecontentofplacedconcrete?• Surfaceemission• Electricalresistance• Electricalimpedance• RelativeHumidityatdepth

Page 25: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete• ASTMD4263StandardTestMethodforIndicatingMoistureinConcretebythePlasticSheetMethod• Veryqualitative• Environmentalconditionscangreatlyinfluenceresults/signal

• Easyandinexpensive• Cangivefalsenegative

Page 26: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

Page 27: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• ASTMF-1869MeasuringMoistureVaporEmissionRateofConcreteSubfloorUsingAnhydrousCalciumChloride• DishofCalciumChlorideisweighedbeforeandafter24hrexposureunderaclearlid• Returnspoundsofwateremittedper1000ft²per24hours• Veryoldtest

Page 28: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• CalciumChloridetest

http://www.duraamen.com/images/mv_pic_01_test_kit_01.jpg

Page 29: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• ASTMF-2420DeterminingRelativeHumidityontheSurfaceofConcreteFloorSlabsUsingRelativeHumidityProbeMeasurementandInsulatedHood• Uncommontest• Usesarelativehumidityprobeplacedontopofslabinsideasmallinsulatedbox• Givesindicationofmoistureatsurfacenotwhatisintheslab• Uncommontest

Page 30: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete• HumidityProbeMeasurementandInsulatedHood

http://www.esellersolutions.com/eSellerManager/images/upload/item/Southsurvey/itemImage_111_7_12_11_48_35.gif

Page 31: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Electricalresistancemeasurement• Drilltwoholesinconcrete• “brush”probesinsertedandresistancebetweenprobescorrelatedtomoisturecontent• NotseenintheUScurrently

Page 32: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 33: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Impedancemeasurementofconcretesurface• Electricfieldispassedthroughconcrete• Instrumentreadsoutmoisturecontentpercentage.• Onlyreadstop1.5inchesofslab

Page 34: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Tramex CMEXII

http://www.i-sells.co.uk/images/Resize%20of%20Electrodes.JPG

http://i.ytimg.com/vi/JJjEJyK4ia8/0.jpg

Page 35: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• ASTMF-2170DeterminingRelativeHumidityinConcreteFloorSlabsUsinginsituProbes• Drillholeinconcretedeck• 40%ofdepth

• Relativehumidityprobeinsertedintohole• Sealed• Recovered/readafter72hours

• (24hoursworksjustfine)

Page 36: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• ASTMF-2170(Continued)• FlooringmanufacturersrequireminimumRHreadingdeliveredviaF-2170beforefloorisallowedtobeinstalled• Wideacceptance• LotsofResearch

Page 37: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

http://www.southsurvey.co.uk/img/gi_20_38_466_700.jpg

Page 38: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 39: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Flooringindustrystruggledwiththeissueconcretefloorsandfailuresattheturnofthecentury• Flooringmanufacturersspecifyatwhattestvalues(moisturecontent)theirproductscanbeinstalledoverconcrete• Typicalvaluesrangefrom80%to90%RHviaF2170

Page 40: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

MoistureinConcrete

• Howeverfloorsandroofsexistindrasticallydifferentenvironments• Floorscanbelefttillneartheendoftheconstructioncycle• Roofneedstogoonveryearly• Floortypicallyhasconditionedair

• Temperatureandhumidity• Roofisexposedtoweather

• Rewetting

Page 41: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BadandWorse

• Sotheflooringcontractorhasiteasyright?• RemembertheHansongraphs?

Page 42: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BadandWorse

EffectsofCuringandDryingEnvironmentsonSplittingandTensileStrengthofConcrete- Hanson

Page 43: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BadandWorse• DifferencesbetweenRegularWeightConcrete(RWC)andLightWeightStructuralConcrete(LWSC)• Mass(approximate)• RWC150lb/ft³• LWSC110lb/ft³

• Startingwatercontent• Regularweightaggregateshave8- 15lb/yd³ofconcrete• Lightweightaggregateshave150– 200lb/yd³ofconcrete

• Bothcanachievethesamecompressivestrengths• LWSCdoesitwithlessweight

Page 44: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

BadandWorse

• Lightweightaggregates• Expandedshalesandclays• Alternatelyreferredtoas“pre-wettedaggregates”• Needtobepondedorsoakedfordaystomonthsbeforebeingbatchedintoaconcretemix• Waterfillsporesandpreventslightweightaggregatesfrominterferingwithmixpropertiesandperformance

• Lightweightstructuralconcretehasrepeatedlybeenshowntotakemuchlongerthanregularweightconcretetodry.

Page 45: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

RecommendedReading

• EngineeringBulletin119:ConcreteFloorsandMoisture• HowardM.Kanare• 2008,PortlandCementAssociation

Page 46: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Fieldexamples(TrainWrecks)

Page 47: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

FieldExample#1

• Plazadeckoncorporatecampus• Lightweightstructuralconcreteoversteeldeck• Toolateindesigntoswitchtoregularweightconcrete

• IRMAdesignwithfluidappliedandself-adhesivewaterproofingsheets• Deckallowedtocure/“dry”insummerheatforjustover3months

Page 48: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 49: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 50: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 51: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 52: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 53: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 54: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 55: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 56: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

FieldExample#2

• Eastcoasthospital• Roofdeckdesignedtobefloorforfutureverticalexpansion• Operatingsuitesbelowroofdeck

• LightWeightStructuralConcreteonmetaldeck• FullyadheredEPDMwithtaperedISO• Lowrisefoamadhesiveinribbons

• Inplacefor3years

Page 57: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 58: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 59: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 60: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 61: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 62: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 63: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 64: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

FieldExample#3

• HospitalintheupperMidwest• Roofdeckintendedtobeafloorforfutureverticalexpansion• LightWeightStructuralConcreteonmetaldeck• FullyadheredEPDMwithtaperedISO• Lowrisefoamadhesiveribbon

Page 65: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

FieldExample#3

• Topfloorunoccupied• Noleaksreported• Firstindicationwasfullyadheredmembranebillowinginwind• Belowdesignwinds• 9monthsafteroccupancy

• Manufacturerdeniedwarrantycoverageduetotrappedmoisture(interiormoisture)• Insurancecompanydeniedclaimasdefectiveconstruction

Page 66: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 67: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 68: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 69: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 70: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 71: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 72: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 73: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 74: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 75: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchPhase1

Page 76: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchSponsors

Page 77: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchGoals

• PrimaryGoal• Determinewhatmoisturelevelinconcretedecksisappropriateforroofingoperations• Newconstructionandreroof

• SecondaryGoals• Studyinstrumentationcapabilitiesforspeedandaccuracyinthedeterminationofmoisturelevelsinconcreteroofdecks• Studyimpactofweatherandthephenomenaof“rewetting”onmoisturelevelsinconcreteroofdecks

Page 78: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchPlan

• 4ModulesofthePhase1• BeganpreparationandplanningSpring2016• ConcretepoursoccurredJuly11,2016• Studyisongoing• Newinformationlearnedreshapeshypothesesanddirectionofresearch• Phase2startingAugust-September2017

Page 79: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 80: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 81: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 82: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 83: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 84: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 85: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 86: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 87: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

• Phase1Fullscaleconcreteweatheringfarmandlabsamples• Received20.43inchesofrainduringthe16weekperiod• TramexCMEXII- ConcreteMoistureMeterused

• Nodiscernabledifferencebetweeninside,outside,normalweight,lightweight

• Onlywasanindicatorofrecentrain

Page 88: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

0.0

1.0

2.0

3.0

4.0

5.0

6.0

A B C D E F G H I J

Readingon

Tramex

Slabs

TramexCMEXII- ConcreteMoistureMeterReadings

9/5/2016

9/8/2016

9/20/2016

10/2/2016

10/15/2016

10/21/2016

Page 89: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

3.25.1

Page 90: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

SurfaceisDry

Moistureisdownhere!

Page 91: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

• Phase1• UseofF-2170probes• WagnerMetersinRogueRiver,Oregonprovidedhundredsofprobesandaccessoriesforthisstudy.• Calibratedbeforeuse• Readingstypicallytaken1,2,3,6,and24hoursafterplacementweekly• Pans• Slabs• Replicates• Exteriorpansbroughtinlabandprobeagain

• Thousandsofreadingswithconfoundingvariables• Promisingdataneedmoretimetostudy

ResearchProgress

Page 92: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

Page 93: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

40

50

60

70

80

90

100

12:00:00AM 3:00:00AM 6:00:00AM 9:00:00AM 12:00:00PM 3:00:00PM 6:00:00PM 9:00:00PM 12:00:00AM

RelativeHu

midity

(%)

Time

F-2170InsertedintoNormalWeightConcrete(15daysafterpour)

Page 94: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

• Phase2Hygrothermalcharacterizationofconcrete• E96VaporPermeability• C1794WaterAbsorptionCoefficient• C1498HygroscopicIsotherm• C1699MoistureRetention

Page 95: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 96: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 97: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

• Module2Hygrothermalcharacterizationofconcrete

ASTME96calculatedPerm·inLightWeightStructural

ConcreteNormalWeight

ConcreteAge WetCup DryCup WetCup DryCup

28Day 1.48 0.78 3.42 1.0560Day 1.45 0.47 2.03 1.13

Page 98: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ResearchProgress

• Module3Hygrothermalmodeling• WUFI5.3ProHygrothermalprogramutilized

• ConsultingwithjustSmartSolutions theU.S.partneroftheGermansoftwarevendor• ThedataoutputfromthemodelinghasbeenvalidatedwithModule1data• Letuslookatsomeofthethingwecanopinefromjustthesimplegraphs!

Page 99: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

NormalWeightConcrete– LabDryDown(4Months)

Top1inchofslab

Page 100: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

NormalWeightConcrete– OutdoorDryDown(4Months)

Top1inchofslab

Page 101: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

TotalWaterContentperFt2 ofslabRegularWeightConcreteChicago,IL(4Mo.)

Page 102: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

TotalWaterContentperFt2 ofslabRegularWeightConcretePhoenix,AZ

(4Mo.)

Page 103: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

TotalWaterContentperFt2 ofslabRegularWeightConcreteEdmonton,CAN

(4Mo.)

Page 104: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Research

• Usedhygrothermaldataforcurrentgenerationroofingmaterials• Simulatedroofslabsoutdoorsfor28daysthenroofed• Withandwithoutvaporretarders• 100’sofcombinations

Page 105: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Research

• Desertsouthwestgenerallyokwithoutavaporretarder• Canada…justplanonavaporretarder• Southerntierstates…maybe• AtlantaslabgoesdownJuly1=okwithnovaporretarder• AtlantaslabgoesdownDecember1=failwithoutavaporretarder

• So…doIneedavaporretarder…itdepends

Page 106: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Recommendations

• Preliminaryfindingsofconcreteresearchprogrampointtoadistinctissuewithslabsinnorthernandhumidclimates.• Workonhygrothermalsimulationsandtheirvalidationisongoing(Phase2).• Butgiventhecurrentlyavailableresearchdataandobservationsfromit,thisresearcherisrecommendingthat:• UnlesstheDesignerofRecordapprovesinwritingotherwise,avaporretarderoflessthan0.01permisnecessaryovernewconcreteroofdecks.

• Theimpactofrewettingonexistingconcretedecks(reroof)andmoistureladenroofsystemsisbeingdetermined.

Page 107: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

ThankYou

ContactInfo:[email protected]

Page 108: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:
Page 109: Twenty -First Annual Westford Symposium on Building ......Twenty -First Annual Westford Symposium on Building Science Westford, MA Vapor Barriers In Compact Roof Assemblies Presenter:

Westford Partnership for Children After School Enrichment ...

Westford Partnership for Children After School Enrichment ...

Symposium on Capital in the Twenty-First CenturyAgenda - Oct. 22, 2015 Symposium on "Capital in the Twenty-First Century" 9:30 - 11 :30 a.m. Morning Session: "The Causes of Inequality:

Symposium on Capital in the Twenty-First CenturyAgenda - Oct. 22, 2015 Symposium on "Capital in the Twenty-First Century" 9:30 - 11 :30 a.m. Morning Session: "The Causes of Inequality:

Twenty-Second Symposium (International) on Combustion/The Combustion ...ronney.usc.edu/AME514/Lecture9/Papers/PittsLiftedFlames-ISC22.pdf · Twenty-Second Symposium (International)

Twenty-Second Symposium (International) on Combustion/The Combustion ...ronney.usc.edu/AME514/Lecture9/Papers/PittsLiftedFlames-ISC22.pdf · Twenty-Second Symposium (International)

Westford feeling overwhelmed

Westford feeling overwhelmed

Westford Parks and Recreation Department€¦  · Web view2016-2017. Westford Parks and Recreation Department . . 6

Westford Parks and Recreation Department€¦  · Web view2016-2017. Westford Parks and Recreation Department . . 6

Twenty Third Annual Aviation Law And Insurance Symposium The Effects of U.S... · Twenty Third Annual Aviation Law And Insurance Symposium ... Iran Air had to forego orders for Boeing

Twenty Third Annual Aviation Law And Insurance Symposium The Effects of U.S... · Twenty Third Annual Aviation Law And Insurance Symposium ... Iran Air had to forego orders for Boeing

Twenty-First Symposium on Naval Hydrodynamics

Twenty-First Symposium on Naval Hydrodynamics

8 Hyacinth Dr, Westford, MA 01886 - Zillow -

8 Hyacinth Dr, Westford, MA 01886 - Zillow -

I SYMPOSIUM ON QFD 2010-PORTLAND THE TWENTY …...THE TWENTY-SECOND SYMPOSIUM ® ON QUALITY FUNCTION DEPLOYMENT September 24-25, 2010 Portland, OR INTERNATIONAL SYMPOSIUM ON QFD 2010-PORTLAND.

I SYMPOSIUM ON QFD 2010-PORTLAND THE TWENTY …...THE TWENTY-SECOND SYMPOSIUM ® ON QUALITY FUNCTION DEPLOYMENT September 24-25, 2010 Portland, OR INTERNATIONAL SYMPOSIUM ON QFD 2010-PORTLAND.

Jeep Dealership Serving Westford, NH

Jeep Dealership Serving Westford, NH

Cell Communication Teresa Burke Westford Academy Funded ...Cell Communication Teresa Burke Westford Academy 30 Patten Road Westford, MA 01886 tburke@westfordk12.ma.us Mentored by William

Cell Communication Teresa Burke Westford Academy Funded ...Cell Communication Teresa Burke Westford Academy 30 Patten Road Westford, MA 01886 [email protected] Mentored by William

Westford Center Traffic and Parking Study

Westford Center Traffic and Parking Study

Essex Westford merger proposal 8-18-15

Essex Westford merger proposal 8-18-15

Twenty-Second Symposium (International) on Combustion ......Twenty-Second Symposium (International) on Combustion/The Combustion Institute, 1988/pp. 2037 2044 THE COMBUSTION OF UNSUPPORTED

Twenty-Second Symposium (International) on Combustion ......Twenty-Second Symposium (International) on Combustion/The Combustion Institute, 1988/pp. 2037 2044 THE COMBUSTION OF UNSUPPORTED

Symposium on CapillaryChromatography and Electrophoresis · Twenty-firstInternational Symposium on CapillaryChromatography and Electrophoresis ParkCity, Utah, USA June20-24,1999 UB/TIB

Symposium on CapillaryChromatography and Electrophoresis · Twenty-firstInternational Symposium on CapillaryChromatography and Electrophoresis ParkCity, Utah, USA June20-24,1999 UB/TIB

23rd NATIONAL SYMPOSIUM ON CRYOGENICS · in India looks forward to. This year’s symposium, the Twenty Third National Symposium on Cryogenics, NSC-23 is being hosted by National

23rd NATIONAL SYMPOSIUM ON CRYOGENICS · in India looks forward to. This year’s symposium, the Twenty Third National Symposium on Cryogenics, NSC-23 is being hosted by National

TWENTY-EIGHTH INTERNATIONAL SYMPOSIUM … Programme.doc · Web viewTHIRTIETH INTERNATIONAL SYMPOSIUM ON ECONOMIC CRIME SUNDAY 2ND SEPTEMBER - SUNDAY 9TH SEPTEMBER 2012 JESUS COLLEGE,

TWENTY-EIGHTH INTERNATIONAL SYMPOSIUM … Programme.doc · Web viewTHIRTIETH INTERNATIONAL SYMPOSIUM ON ECONOMIC CRIME SUNDAY 2ND SEPTEMBER - SUNDAY 9TH SEPTEMBER 2012 JESUS COLLEGE,

Westford Partnership for Children After School Enrichment ... · Session 3: January 2-February 28, 2014 Westford Parks & Recreation PO Box 2444 35 Town Farm Road Westford, MA 01886

Westford Partnership for Children After School Enrichment ... · Session 3: January 2-February 28, 2014 Westford Parks & Recreation PO Box 2444 35 Town Farm Road Westford, MA 01886

Westford Partnership for Children After School Enrichment ... · Session 4: March 3-May 2, 2014 Westford Parks & Recreation PO Box 2444Crisafulli 35 Town Farm Road Westford, MA 01886

Westford Partnership for Children After School Enrichment ... · Session 4: March 3-May 2, 2014 Westford Parks & Recreation PO Box 2444Crisafulli 35 Town Farm Road Westford, MA 01886

TWENTY-NINTH ANNUAL SYMPOSIUM of the LABORATORY FOR …lsm.rutgers.edu/cgi-server/user-html/news/Symposium2015... · 2015. 3. 30. · TWENTY-NINTH ANNUAL SYMPOSIUM LABORATORY FOR

TWENTY-NINTH ANNUAL SYMPOSIUM of the LABORATORY FOR …lsm.rutgers.edu/cgi-server/user-html/news/Symposium2015... · 2015. 3. 30. · TWENTY-NINTH ANNUAL SYMPOSIUM LABORATORY FOR