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AngelaPakes,PE,LEEDAPandMorganSanger,GreenAssociateReneeOlley andTuncerEdil
Presentationto2017TransportationResearchBoardSummerWorkshop
Duluth,MN- July20,2017
RecycledMaterialsResourceCenterattheUniversityofWisconsin-Madison
EnvironmentalBenefitsofCold-in-PlaceRecyclingin
Wisconsin
Agenda■ CurrentAggregateuseinRoadConstruction
■ ConventionalMillandOverlayMethodvs.Cold-in-PlaceRecycling
■ ResearchMethods– NineCaseStudies– LifeCycleAssessments
■ IndividualProjectExample:STH13
■ EnvironmentalSavings– PercentReductions– CumulativeSavings– SavingsPredictions
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680Mt/yr ofvirginaggregateusedin
roadconstruction
Mining Transport Construction Transport Disposal
[a]
RecognizedQualitativebenefitsofCIR
Reducesnon-renewable,virginmaterialsandtransportation.
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Economical
EnvironmentalSocial
Extendsthelifeoftheroadway
[b][b]
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ConstructionComparison
■ Millexistingroadway
■ Haultonearestasphaltplant
■ Pavehotmixasphaltlayer(4in)
■ Millexistingroadway
■ Crushandsortrecycledasphaltpavement
■ Mixwithstabilizingagent
■ PaveCIR
■ CIRCure(1-14days)
■ Pavehotmixasphaltlayer(2-3.5in)
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ConventionalMillandOverlay Cold-in-PlaceRecycling
CaseStudies
CTHH(ReedsburgtoWisconsinDells)
STH13(MedfordtoWestboro)
STH27(SpartatoBlackRiverFalls)
STH48(GrantsburgtoFrederic)
STH48(RiceLaketoBirchwood)
STH64(GilmantoMedford)
STH72(EllsworthtoElmwood)
STH95(BlairtoMerrillan)
STH187(ShioctontoNorthCountyLine)
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SummaryofProjectInformation
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ProjectMOLHMAThickness(inches)
CIRBaseThickness(inches)
CIRHMAThickness(inches)
RoadWidth(ft)
ProjectLength(miles)
HaulingDistance(miles)
Single- orMulti-UnitRecyclingTrain
CTHH 4.5 4 3.5 30 9.5 5.3 Multi
STH13 4 4 2.25 30 5.64 11.6 Multi
STH27 4 4 2.25 30 8.99 8.7 Single
STH48(RiceLake) 4 3 2 30 8.10 10.3 Multi
STH48(Grantsburg) 4 4 2.25 24 12.5 4.3 Multi
STH64 4 4 2.25 30 4.46 3.7 Multi
STH72 4 4 2.25 30 4.63 18.3 Multi
STH95 4 4 2.5 30 4.42 24.4 Multi
STH187 4 3 2.5 30 9.84 21.3 Multi
Multi-UnitRecyclingTrain(8projects)
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Single-UnitRecyclingTrain(1project)
[MathyConstruction,2016]
[LACountyDepartmentofPublicWorks]
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■ CreatedbytheConsortiumonGreenDesignandManufacturingfromtheUniversityofCalifornia-Berkeley(2007),sponsoredbyRMRC
■ ScopeofImpactAnalysis– InitialConstruction– MaintenanceConstruction– End-of-lifeAnalysis
■ ComponentsofImpactAnalysis– MaterialProduction– MaterialTransportation– Process(Construction)
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TheWisconsinprojectswereevaluatedas
Maintenanceconstruction.
LifeCycleAssessment:PaLATEPavementLife-cycleAssessmentToolforEnvironmentalandEconomicEffects
LifeCycleAssessment
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DefineScopeofAssessment
EnergyConsumption
(kWh)
CarbonDioxideEmissions(tons)
WaterConsumption
(tons)
TakeInventory
QuantityofMaterialsUsed
EquipmentandEquipment
Specifications
CompleteImpact
Assessment
MillandOverlay
Cold-in-PlaceRecycling
InterpretResults
PercentReductions
CumulativeSavings
SavingsPredictions
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Assumptions■ MOLprojectshad4-4.5inchesofHMAoverlay.
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Assumptions■ MOLprojectshad4inchesofHMAoverlay.
■ MixdesignisthesamefortheMOLandCIRprocessesforeachproject.
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Assumptions■ MOLprojectshad4inchesofHMAoverlay.
■ MixdesignisthesamefortheMOLandCIRprocessesforeachproject.■ HaulingdistancefromthemidpointofeachprojecttotheclosestHMA
plant.
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Assumptions■ MOLprojectshad4inchesofHMAoverlay.
■ MixdesignisthesamefortheMOLandCIRprocessesforeachproject.■ HaulingdistancefromthemidpointofeachprojecttotheclosestHMA
plant.
■ Watertruckswerenotincludedinanalysis.
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Assumptions■ MOLprojectshad4inchesofHMAoverlay.
■ MixdesignisthesamefortheMOLandCIRprocessesforeachproject.■ HaulingdistancefromthemidpointofeachprojecttotheclosestHMA
plant.
■ Watertruckswerenotincludedinanalysis.■ Allprojectsusingamulti-unitrecyclingtrainwereassumedtousethe
sameequipment.
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ProjectID 1610-03-62
ConstructionYear 2016
County Taylor
Contractor(CIR) WK
Contractor(MOL) Mathy
ProjectLength(miles) 5.64
HaulingDistance(miles) 11.6
RoadWidth(feet) 30
MillandOverlayHMAThickness(inches) 4
ColdIn-PlaceRecyclingThickness(inches) 4
ColdIn-PlaceRecyclingHMAThickness(inches) 2.25
RAPHauledAwayduringCIR(CY) 5,811
Binder(%) 6.3
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STH13(MedfordtoWestboro)
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STH13inTaylorCounty§ 5.6-mileprojectfrom
MedfordtoWestboro§ Underconstructionin2016
byWKandMathy§ 4inchesofCIRunder2.25
inchesofnewHMAoverlay§ 11.6-milehaulingdistance§ Multi-unitrecyclingtrain
20-22%ReductioninEnvironmentalImpacts
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Environmentalsavingsbyproject
ProjectEnergyConsumption
[kWh]
WaterConsumption
[tons]
CarbonDioxide
Emissions[tons]
CTHH 1,109,699 1.0 211
STH13 2,008,621 2.4 411
STH27 2,030,254 1.8 395
STH48RiceLake 3,930,466 5.1 820
STH48Grantsburg 8,394,554 11.0 1,738
STH64 3,013,623 5.2 676
STH72 1,042,297 1.1 214
STH95 1,200,412 1.2 250
STH187 1,141,070 1.0 239
Total 23,871,000 29.7 4,955
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y=0.7522xR²=0.7777
0200400600800
100012001400160018002000
0 500 1000 1500 2000 2500
CO2Savings[ton
s]
Normalized HMAReduction[CY/miles]
CO2 SavingsProjection
y=0.0047xR²=0.7622
0
2
4
6
8
10
12
0 500 1000 1500 2000 2500
WaterSavings[tons]
Normalized HMAReduction[CY/miles]
WaterSavingsProjection
y=3620.6xR²=0.7832
0
1000000
2000000
3000000
4000000
5000000
6000000
7000000
8000000
9000000
0 500 1000 1500 2000 2500
EnergySavings[kW
h]
Normalized HMAReduction[CY/miles]
EnergySavingsProjection
ProjectSavingsPredictionsAllProjects
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Futurepredictionscanbemadewithroadwidth,length,reductioninHMAand
haulingdistance
H
27 27
H H
27
TotalEnvironmental Savings68RoadMiles
30tonsofwater158Bathtubs
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2,183U.S.Households
956Cars 4,955tonsofCO2
23,871,001kWh[c]
[d]
[e]
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Thankyou!
Questions?
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Thankyou!