SHRP2 R21 Composite Pavement Systems – Project Overvie · SHRP2 R21 Composite Pavement Systems...
Transcript of SHRP2 R21 Composite Pavement Systems – Project Overvie · SHRP2 R21 Composite Pavement Systems...
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SHRP2 R21 Composite Pavement Systems – Project Overview
Shreenath Rao, Ph.D., PE
Applied Research Associates, Inc.
August 23, 2010MnROAD Open House
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Prime contractor: Applied Research Associates, Inc. Sub contractors: U. Minnesota, Mn/DOT, U. California, U. PittsburgKey Staff: Darter, Rao, Khazanovich, Von Quintus, Harvey, Signore,
Worel, Clyne, Watson, Vandenbossche, Tompkins
Duration: 48 monthsContract Start Date: September 2007
R21. Composite Pavement Systems R21. Composite Pavement Systems
This project focuses on two applications of intentionally
designed composite pavement systems:
1. Asphalt over concrete (JPC, CRC, RCC)
2. Concrete surface over concrete (wet on wet)
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R21. Composite Pavement Systems (Objectives)R21. Composite Pavement Systems (Objectives)
– Determine the behavior and identify critical material and performance parameters
– Develop and validate mechanistic-empirical performance models and design procedures consistent with the Mechanistic-Empirical Pavement Design Guide (MEPDG)
– Recommend specifications, construction techniques and quality management procedures and guidelines
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European Survey of Composite PavementsEuropean Survey of Composite Pavements
• Europe has built composite pavements for many years
• Why?
� Excellent surface characteristics
� High friction
� Low tire/pavement noise
� Low splash and spray
� Rapid renewal (asphalt)
� Long life (concrete)
� Economical (Yes, believe it or not)� Lower layer: thick and low cost
(e.g. recycled, low cement, etc.)
� Upper layer: thin and high quality
(e.g. hard aggregate, high cement)
� Sustainable
� Recycled lower PCC layer
� Lower cost aggregates
� Rapid renewal of top HMA layer
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European Survey of Composite PavementsEuropean Survey of Composite Pavements
• Netherlands
• Germany
• Austria
Report published as an online document
http://www.trb.org/Main/Blurbs/2008_Survey_of_European_Composite_Pavements_163693.aspx
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• Subgrade and base constructed Fall 2008.
• JPCP constructed August 2009.
• Extensive instrumentation done at same time.
• HMA construction (and instrumentation) in October 2009.
• Currently being tested using the HVS to obtain pavement
responses and measure distresses (rutting, reflection
cracking).
Construction of HMA/PCC Test Sections at
UCPRC for HVS Testing
Construction of HMA/PCC Test Sections at
UCPRC for HVS Testing
Test cells constructed at University of California Pavement Research Center in Davis, CA for accelerated Heavy Vehicle Simulator (HVS) testing
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Layout of Test Cells at UCPRCLayout of Test Cells at UCPRC
13.7 m
HMA Mix 1 114 mm HMA Mix 1 –
Dowel Dowel Dowel
PCC 178 mm PCC 178 mm PCC 178 mmA
B
C
D
3.7 m
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AC
PCC
AB
Plan
View
Section
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64 mm No HMA
Dowel DowelA
B
C
D
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AC
PCC
AB
Plan
View
Section
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178 mm = 7 in
127 mm = 5 in
114 mm = 4.5 in
64 mm = 2.5 in
13.7 m = 45 ft
3.7 m = 12 ft
–
HMA Mix 1 114 mm HMA Mix 1 –
No Dowel
PCC 178 mm PCC 178 mm PCC 178 mm
64 mm No HMA
No Dowel No Dowel
–
HMA Mix 2 114 mm HMA Mix 2 –
No Dowel
PCC 178 mm PCC 178 mm PCC 178 mm
64 mm No HMA
No Dowel No Dowel
–
HMA Mix 2 114 mm HMA Mix 2 –
No Dowel
PCC 127 mm PCC 127 mm PCC 127 mm
64 mm No HMA
No Dowel No Dowel
–
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Instrumentation plan for test cells at UCPRCInstrumentation plan for test cells at UCPRC
A
B
D
C
1
J
J
J
J
J
J
J
J
J
J
J
J
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J
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J
H
H
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H
H
HH
H
5
T
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T
5T
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5T
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T
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5T
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All nine slabs in each lane are 15 ft. long, center slabs of each group (1,2,3) are widened for display purposes.
A
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T
5T
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5T
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All nine slabs in each lane are 15 ft. long, center slabs of each group (1,2,3) are widened for display purposes.
T – Thermocouple J – Vertical JDMD H – Horizontal JDMD
D – Dynamic Strain Gauge M – Moisture Gauge S – Static Strain Gauge
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UCPRC Instrumentation: ThermocouplesUCPRC Instrumentation: Thermocouples
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UCPRC Instrumentation: Strain Gages and
Cables
UCPRC Instrumentation: Strain Gages and
Cables
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UCPRC Construction: PCC PlacementUCPRC Construction: PCC Placement
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UCPRC Construction: Texturing, Curing, Saw-
Cutting
UCPRC Construction: Texturing, Curing, Saw-
Cutting
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PG64-28PM (left two lanes) and Gap Graded
Rubber mix RHMA-G (right two lanes)
UCPRC Construction: HMA Placement and
Compaction
UCPRC Construction: HMA Placement and
Compaction
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UCPRC HVS TestingUCPRC HVS Testing
0 0.5 1 1.5 2 2.5
x 105
0
5
10
15
20
25
Repetition
Ma
xim
um
Ru
t (m
m)
612HB609HB610HB611HB
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UCPRC HVS Testing – Parametric AnalysisUCPRC HVS Testing – Parametric Analysis
• Effect of various parameters on deflections and strains
• JDMDs (joint deflections) various positions
• Strain gages (tire center and tire edge)
• Various sections
• 50-75 load repetitions at each combination
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UCPRC HVS Testing – Parametric AnalysisUCPRC HVS Testing – Parametric Analysis
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UCPRC HVS Testing – Parametric AnalysisUCPRC HVS Testing – Parametric Analysis
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UCPRC HVS Testing – Parametric AnalysisUCPRC HVS Testing – Parametric Analysis
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• Plans, specifications, and estimates were prepared in
winter 2008/09.
• Bids let in July 2009 and lowest price (of two bids) was
acceptable.
• Construction: April/May 2010.
• Currently open to freeway traffic.
Construction of HMA/PCC and PCC/PCC Test
Sections at MnROAD
Construction of HMA/PCC and PCC/PCC Test
Sections at MnROAD
Full-length two-lane test sections constructed at MnROAD in Albertville, MN on Interstate 94.
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Experimental Plan for Construction at MnROADExperimental Plan for Construction at MnROAD
144 m (474 ft)
Clay Subgrade
152-mm (6-in) PCC, 4.6-m (15-ft) joints32-mm (1.25-in) dia. dowels driving
lane, nondoweled passing lane.Recycled PCC
433 m (1420 ft)
76-mm (3-in) HMA (S & S jointsexcept for a few joints)
76-mm (3-in) Granite(~145 m (475 ft) diamond grind; ~145 m (475 ft) exposed aggregate)
203-mm (8-in) Class 5 Special (Granular Base)
289 m (947 ft)
152-mm (6-in) PCC, 4.6-m (15-ft) joints, 32-mm (1.25-in) dia. dowels.
Recycled PCC(84 m, 275 ft)
152-mm (6-in) PCC, 4.6-m (15-ft) joints, 32-mm (1.25-in) dia. dowels.
Low-cost (high fly ash content) PCC(205 m, 672 ft)
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MnROAD Recycling and Salvage OperationsMnROAD Recycling and Salvage Operations
RCA Percent Absorption 2.93%
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MnROAD Demonstration SlabMnROAD Demonstration Slab
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Instrumentation Plan for Construction at
MnROAD
Instrumentation Plan for Construction at
MnROAD
12'
10' Bit Shoulder
15' 15' 15' 15' 15'
Static PannelsDynamic Pannels
Spacing Pannel-No Sensors
P1P2P3P4P5
Cab
Vault
Vault
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MnROAD Instrumentation: Thermocouples, Moisture
Gages, Static and Dynamic Strain Gages
MnROAD Instrumentation: Thermocouples, Moisture
Gages, Static and Dynamic Strain Gages
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MnROAD Instrumentation: Moisture Gages, and
Static and Dynamic Strain Gages
MnROAD Instrumentation: Moisture Gages, and
Static and Dynamic Strain Gages
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MnROAD Paving Wet-on-Wet PCC/PCCMnROAD Paving Wet-on-Wet PCC/PCC
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MnROAD Construction: PCC PlacementMnROAD Construction: PCC Placement
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Exposed Aggregate Concrete TextureExposed Aggregate Concrete Texture
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MnROAD HMA/PCC DesignMnROAD HMA/PCC Design
Section Cell 70 HMA/ PCC (145 m [475 ft])
HMA
Thickness 75 mm (3 in) placed in 2 lifts
Binder PG 64-34
Mix Superpave wearing course designated SPWEB440F with 12.5 mm (0.5 in) nominal maximum aggregate size (SP 12.5)
PCC
Thickness 150 mm (6 in)
Mix Low portland cement (~150 kg/m3 [250 lb/yd3]) 60% fly ash
Aggregate 50% RCA, 50% Mn/DOT Class A Maximum aggregate size 32 mm (1.25 in)
Base 200 mm (8 in) Class 5 unbound
Subgrade Clay
Joint Spacing 4.6 m (15 ft)
Dowels 32 mm (1.25 in) placed on baskets in driving lane at PCC middepth and undoweled passing lane
Joints Saw and seal HMA over PCC joints (except last 6
joints)
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MnROAD HMA/PCC ConstructionMnROAD HMA/PCC Construction
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MnROAD HMA/PCC Sawing and SealingMnROAD HMA/PCC Sawing and Sealing
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MnROAD Test SectionsMnROAD Test Sections
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• Data collected from many HMA/PCC & PCC/PCC sites in USA, Canada, and Europe
• Database set up and sections evaluated• Key sections selected for further field testing
and evaluation• Possible construction of HMA/PCC sections
at the Illinois Tollway
Other Field SitesOther Field Sites
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What are the next steps for R21?What are the next steps for R21?
UCPRC and MnROAD Construction and Field Sections
• UCPRC - Continue HVS loading and data collection until: Spring/Summer 2011
• MnROAD - Monitoring instrumentation and performance data collection (including ride and noise) until: Summer 2011
• Field Sections - Field data collection (distress surveys, materials data, IRI, etc.): Fall 2010
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What are the next steps for R21?What are the next steps for R21?
Modeling
• 2-layer concrete pavement modeling• PCC lab modeling and materials testing• Rutting model• Reflection cracking model• MEPDG model modifications and calibration
(results from monitoring and instrumentation @ MnROAD and UCPRC; other field sections)
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Anticipated R21 products?Anticipated R21 products?
a.Refined and validated structural & performance models
b.Design procedures and guidelines (manual, recommended additions to AASHTO MEPDG manual)
c.Construction specifications (MnROAD, UCPRC, Europe, other)
d.Life-cycle cost procedures.e.Composite pavement training materials to aid
in implementation