Extended Life Pavements Extended Life Pavements in Wisconsinin Wisconsin

Judie Ryan Judie Ryan –– WisDOT BTSWisDOT BTSJames Crovetti James Crovetti -- Marquette UniversityMarquette University

Instrumentation Project Instrumentation Project II--43 NB43 NB

N

Marquette InterchangeMarquette Interchange

North Leg SectionNorth Leg Section Wells St to North AveWells St to North Ave

North Leg HMANorth Leg HMA Pavement Design DetailsPavement Design Details

1999 ADT = 138,8001999 ADT = 138,8002025 ADT = 152,7002025 ADT = 152,70011% Heavy Trucks11% Heavy Trucks37.1 Million 37.1 Million ESALsESALs (WisDOT)(WisDOT)

North Leg PerpetualNorth Leg Perpetual HMA Pavement StructureHMA Pavement Structure

• 2” SMA Wearing Surface (70-28)

• 7” E30 Middle Layers (64-22)

• 4” C2 Bottom Layer (64-22)

• 4” Open Graded Aggregate #2

• 6” Dense Graded Aggregate

• 18” Select Crushed Material

• Sandy-Silty-Clayey Soils

Project GoalsProject Goals

Select/Procure/Install sensors into Select/Procure/Install sensors into section of pavementsection of pavementProvide data to evaluate fatigue life of Provide data to evaluate fatigue life of the pavement structurethe pavement structureCompare experimental data against Compare experimental data against MM--E outputsE outputsCalibrate local design inputsCalibrate local design inputs

Installed Sensor TypesInstalled Sensor Types

Asphalt Strain Sensors (25)Asphalt Strain Sensors (25)Earth Pressure Cells (4)Earth Pressure Cells (4)Moisture Probes (6)Moisture Probes (6)Soil Temperature Probes (6)Soil Temperature Probes (6)HMA Temperature Gradient Probe (1)HMA Temperature Gradient Probe (1)PK Piezo Wheel Wander Grid (3)PK Piezo Wheel Wander Grid (3)Quartz Piezo WIM Strips (2)Quartz Piezo WIM Strips (2)IR Surface Temperature Sensor (1)IR Surface Temperature Sensor (1)Wind Speed (1)Wind Speed (1)Solar Radiation (2)Solar Radiation (2)Air Temperature (1)Air Temperature (1)

Instrumentation LocationInstrumentation Location Looking SouthLooking South

WIM/Wander

Strain/Pressure Sensors

Equipment Cabinet

I

III

I

II I I

III

I

II I I

II

I

I

II I I

Traffic Flow

C/L of Wheel Path

A

B

Cx

30” 10’

Maintaining System Maintaining System IntegrityIntegrity

Replaced malfunctioning equipment:Replaced malfunctioning equipment:–– Pavement temperature gradient probePavement temperature gradient probe–– (2) Pyranometers(2) Pyranometers–– Infrared pavement surface temperature Infrared pavement surface temperature

probeprobe

Added a backAdded a back--up server to mirror the up server to mirror the primary databaseprimary database

Data ProcessingData Processing

Developed an algorithm for Developed an algorithm for selecting peak values from strain selecting peak values from strain and pressure signalsand pressure signalsMethod for matching peak tensile Method for matching peak tensile strains/pressures with each strains/pressures with each associated wheel event is nearing associated wheel event is nearing completioncompletion

Pavement Life ProjectionsPavement Life Projections

Characterization of material properties to be Characterization of material properties to be completed soon (completed soon (MrMr, E*, etc.) , E*, etc.) Environmental data used to develop Environmental data used to develop seasonal variations in material propertiesseasonal variations in material propertiesStrain readings used for peak tracking and Strain readings used for peak tracking and loading timesloading timesComparisons of predicted versus measured Comparisons of predicted versus measured strains (ILLIstrains (ILLI--PAVE, EVERSTRESS, etc)PAVE, EVERSTRESS, etc)MEPDG analysis and standMEPDG analysis and stand--alone predictions alone predictions

HMA Master Curves

1.E+04

1.E+05

1.E+06

1.E+07

-5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0 5.0

Log Frequency, Hz

|E*|,

psi

SMA E30 C2

Average Hourly Truck DistributionNov 10-16, 2007

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Average Hourly Truck DistributionNov 10-16, 2007

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2D 3SU 2S-1 2S-2

Cumulative Distribution of Wheel Loads From Class 9 VehiclesOctober 19-27, 2007

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0 5 10 15 20 25 30Wheel Load, kips

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Steering First Tandems Second Tandems

Peak and Off-Peak Wheel Wander(+) Offset is right of C/L of Wheel-path

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-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 >40

Offset from C/L, inches

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Off Peak Peak

Peak Strain ReadingsAugust 19-25, 2007

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Peak Microstrain

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A0 A1 A2

Data PackagingData Packaging

Project website in developmentProject website in developmentWeb portal created to display dataWeb portal created to display data–– www.MChangewww.MChange--Strain.comStrain.com

PrePre--packaged data will be available for packaged data will be available for download as a compressed file.download as a compressed file.Additional content can be accessed via Additional content can be accessed via a reada read--only account on only account on MySQLMySQL server.server.

Thanks Thanks for your attention!for your attention!

www.MChangewww.MChange--Strain.comStrain.com