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Current Advancements from MnROAD and NCATfor Local Agencies
Benjamin Worel, P.E. (MnROAD Operations Engineer)
Dr. R. Buzz Powell, P.E. (NCAT Assistant Director)
NACE - April 25, 2018
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Presentation Outline
2
• MnROAD – NCAT partnership• Northern Experiment• Southern Experiment• Future Opportunities
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First of All
Thank you!
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Investment into Pavement Research
Minnesota Highway System
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Investment into Pavement Research
Minnesota Highway System
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MnROAD Background
• MnROAD Owned and Operated by Minnesota DOT• 23-Years of Long Term Customer Service
• Minnesota Department of Transportation• Minnesota Local Road Research Board• SHRP II / NCHRP / FHWA• Pooled Funds Efforts (States) / Industry• National Road Research Alliance
• HMA and PCC Pavements• Major Experiments
• Phase I (1994-2006)• Phase II (2007-2016)• Phase III (2017 - )
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Technology TransferShort Term Research
SRF Consulting
NRRA Team Topic
Flexible Tack Coats
Longitudinal Joint Construction Performance
Rigid Design and Performance of Concrete Unbonded Overlays
Repair of Joint Associated Distress Pavements
Geotechnical Larger Subbase Materials
Subgrade Design for New and Reconstructed Roadways
Pavement Maintenance
Surface Characteristics of Diamond Ground PCC Surfaces
Pavement Preservation Approaches for Lightly Surface Roadways
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Long Term ResearchFlexible Team
Rigid Team
Team Project Contractor
Flexible
HMA Overlay of PC and Methods of Enhancing Compaction
University of New Hampshire
Cold Central Plant RecyclingAmerican Engineering
and Testing
Rigid
Fiber Reinforced ConcreteUniversity of
Minnesota Duluth
Early Opening Strength to TrafficUniversity of
Pittsburg
Optimizing Concrete Mix Components Iowa State
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Long Term ResearchGeotechnical Team
Pavement Maintenance Team
Team Project Contractor
GeotechnicalRecycled Aggregates
Iowa StateLarge Stone Subbase
Pavement Maintenance
Maintaining Poor Pavements SRF Consulting
Partial Depth Repair Braun Intertec
http://www.dot.state.mn.us/mnroad/nrra/index.html
NRRA Conference – May 23-24, 2018Monticello and St Paul, Minnesota
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MnROAD Finding - Importance of Sealing
PCC Lane / HMA Shoulder Sealing
Cell 7 Control
Cell 8 Sealed
Similar results for HMA Pavements
Mn/DOT: Ruth Roberson
Roger Olson
Chad Millner
Cell 8Cell 7
Results
* 89% reduction between cells
•86% reduction within Cell-8
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Asphalt–Deterioration asphalt–Increased roughness (ride)
Concrete –ML Observations (high traffic)
• None - PASB used• Some - Class-5 / well sealed joints / edge drain• High amount - Class-5 / no edge drains
–LVR Observations (low traffic)• If sealed class-5 is not as destructive• If not-sealed class-5 can develop joint damage
Benefits–Importance of drainable bases / sealing–Effect on ride
MnROAD Finding - Importance of Drainage
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Optimal Timing of Preventive Maintenance Addressing Environmental Aging
TPF-5(153) Pooled Fund• Asphalt Institute• MnROAD test cells and other sections• Lab aging study with coring of roadways
treated yearly
Observations • The optimal timing to prevent aging of the
asphalt is 1 year after HMA placement• Surface Treatments are benefit to our
roadways
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MnROAD Finding - Chip Seal Details
• CRS-2P on pavement markings• 0.36 gal/sy of CRS-2P emulsion• 18 lbs/sy of -3/8” granite chip• 3 roller passes• Fog seal CSS-1H diluted 1:1 (+shoulders)• 0.12 gal/sy and 1’ lap at centerline
High Speed Chip Video - https://www.youtube.com/watch?v=Ol5R7n8zGoc
Fog Sealed
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MnROAD Finding - MicroSurfacing
LVR ~ 1999• Flexible MicroSurfacing
Mainline ~2000• Multiple Treatments Best• Double Micro• Micro with Crack Sealing• Micro with Transverse Crack Micro
Mainline ~ 2004 (HiMA)• PG 49-34 base AC (vs. 64-22)• Kraton SBS polymer D0243, at 6%• Scratch 12 lbs/sy• Surface course 15 lbs/sy• 16% emulsion (vs. 13% typical)
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MnROAD & NCAT Background
15
• Development
– Informal in the past
– June 2014 @ MnROAD
– October 2014 @ NCAT
– FP2 / NCPP Participation
• Partnership Benefits
– Individual Strengths of Each Other
– Operations / Data Sharing / Analysis
– North/South Environmental Zones
– Greater National Appeal
October 2014 @ NCAT
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Common Activates
Common Performance Monitoring• Dedicated Pathways Van
• Cracking/Rutting/Ride
• Deflection (FWD), …..
Traffic MonitoringSensor MonitoringDatabase
• Utilize the MnROAD common database with NCAT
Communication• Joint Planning Meeting with Sponsor's• Website• Reporting• National Presentations
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Data Collection Frequency
4/26/2017 17
ParameterNCATTrack
LeeRoad 159 US-280
MnROADSite
US-169CSAH-8
Roughness Weekly Weekly Weekly 2X Month 2X Month
Rutting Weekly Weekly Weekly 2X Month 2X Month
Macrotexture Weekly Weekly Weekly 2X Month 2X Month
Crack Mapping Weekly Monthly+ Monthly+ 2X Year+ 2X Year+
FWD Weekly Monthly Quarterly 3X Year 3X Year
Surface Friction Monthly Monthly Monthly 2X Year 2X Year
Permeability Quarterly - Quarterly
Noise Quarterly - Quarterly 2X Year 2X Year
Minnesota ~April to December
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Partnership Vision for Nationwide Impact
4/26/2017 18
To facilitate high value pavement research that addresses national needs using full-scale pavement testing facilities in both warm and cold climates on flexible, rigid, and composite pavement structures
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National Research Initiatives
4/26/2017 19
National Pavement Preservation Study
Development of a National Cracking Test
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2015 HMA Performance TestResearch Sponsors
4/26/2017 20
Washington
Oregon
California
Nevada
Idaho
Montana
Wyoming
ColoradoUtah
New MexicoArizona
Texas
Oklahoma
Kansas
Nebraska
South Dakota
North DakotaMinnesota
Wisconsin
Illinois
Iowa
Missouri
Arkansas
Louisiana
Alabama(DOT &
DEM)
Tennessee
Michigan
Pennsylvania
New York
Vermont
Georgia
Florida
Mississippi
Kentucky
South Carolina
North Carolina
MarylandOhioDelaware
Indiana West Virginia
New Jersey
Connecticut
Massachusetts
Maine
Rhode Island
Virginia
New HampshireMichigan(upper pennisula)
Washington
Oregon
California
Nevada
Idaho
Montana
Wyoming
ColoradoUtah
New MexicoArizona
Texas
Oklahoma
Kansas
Nebraska
South Dakota
North DakotaMinnesota
Wisconsin
Illinois
Iowa
Missouri
Arkansas
Louisiana
Alabama(DOT &
DEM)
Tennessee
Michigan
Pennsylvania
New York
Vermont
Georgia
Florida
Mississippi
Kentucky
South Carolina
North Carolina
MarylandOhioDelaware
Indiana West Virginia
New Jersey
Connecticut
Massachusetts
Maine
Rhode Island
Virginia
New HampshireMichigan(upper pennisula)
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National HMA Cracking Performance Test
21
Partnerships• Utilize both MnROAD / NCAT Test Tracks
• Top Down / Reflection / LTC cracking Efforts• Range of cracking potential mixes • Battery of testing of many different existing tests Nationally
Goals• We need tests and criteria that relate to performance.• We need tests that are practical for both mix design verification
and quality control testing purposes.• We need tests that accommodate recycled materials, new and
future additives, and combinations.
OT
16
17
23
22
21
20
19
18
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2016 MnROAD Mix DesignsHMA Performance Test Experiment
22
22
MIX DESCRIPTION RAP RAS CELL BINDERAggregate
SizePOLY
CRACKPOTENTIAL
High Temp Mix ~30 5 16 PG 64S-22 12.5mm No High
High Temp Mix <20 3 17 PG 64S-22 12.5mm No High
High Temp Mix <20 0 18 PG 64S-22 12.5mm No Med/High
High Temp Mix + regressed voids
(3.0)<20 0 19 PG 64S-22 12.5mm No Med/High
Soft Binder Mix >30 0 20 PG 52S-34 12.5mm No MedTypical Low-Temp
Mix<20 0 21 PG 58H-34 12.5mm Yes Low
Typical Low-Temp Mix + limestone
<20 0 22 PG 58H-34 12.5mm Yes Low/Med
HiMA Mix <15 0 23 PG 64E-34 12.5mm Yes Low
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2015 Pavement Preservation Research Sponsors
23
Washington
Oregon
California
Nevada
Idaho
Montana
Wyoming
ColoradoUtah
New MexicoArizona
Texas
Oklahoma
Kansas
Nebraska
South Dakota
North DakotaMinnesota
Wisconsin
Illinois
Iowa
Missouri
Arkansas
Louisiana
Alabama(DOT &
DEM)
Tennessee
Michigan
Pennsylvania
New York
Vermont
Georgia
Florida
Mississippi
Kentucky
South Carolina
North Carolina
MarylandOhioDelaware
Indiana West Virginia
New Jersey
Connecticut
Massachusetts
Maine
Rhode Island
Virginia
New HampshireMichigan(upper pennisula)
FP2
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Preservation Group Study Goals
Develop independent life-extending benefit curves for a range of pavement preservation treatments under varying
traffic levels and climates
Washington
Oregon
California
Nevada
Idaho
Montana
Wyoming
ColoradoUtah
New MexicoArizona
Texas
Oklahoma
Kansas
Nebraska
South Dakota
North DakotaMinnesota
Wisconsin
Illinois
Iowa
Missouri
Arkansas
Louisiana
Alabama
Tennessee
Michigan
Pennsylvania
New York
Vermont
Georgia
Florida
Mississippi
Kentucky
South Carolina
North Carolina
MarylandOhio Delaware
Indiana West Virginia
New Jersey
Connecticut
Massachusetts
Maine
Rhode Island
Virginia
New Hampshire
Michigan(upper pennisula)
Hot, wet, no-freeze
Cold, wet, freeze
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MnROAD / NCAT Partnership History
Summer/Fall 2012Lee Road 159
(Alabama)
2012 20172015
Summer 2016US – 169CSAH – 8
(Minnesota)
Summer 2015US – 280
(Alabama)
20182013 2014 2016
2015NCAT – MnROAD
Partnership
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Northern Pavement Preservation
26
County Road 146RP 185.3
Rum River BridgeRP 189.9
US-169High Volume
Road4 mile section
County Road 8Low Volume Road2.5 mile section
Mille Lac County
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Thank YouContractors and Material Suppliers
27
• Vance Brothers• East Alabama
Paving• Brock White• Crafco• Colas• Etnyre
• Hardrives• Roadtec• Astech Corp• Martin Marietta Materials• Collaborative Aggregates• Asphalt Materials
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Northern Layout of US-169/CSAH-8
28
28 Control
27 Thinlay Overlay (ABR over Chip Seal (FA 2.5))
26 Thinlay Overlay (ABR)
25 Thinlay Overlay (HiMA)
24 Ultra Thin Bonded Wearing Coarse N23 Thinlay Overlay (Virgin)
22 Thinlay Overlay (ABR with Delta S)starts 1/2 mile from US-169
CSAH - 8 (WB) 31 30 29 28 27 26 25 24 23 22
CSAH - 8 (EB) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
21 Control
20 Control - Low IRI
19 Convensional Fog Seal
18 Control
17 Rejuvenating Fog Seal
16 Control
15 Control
14 Control
13 Scrub Seal (FA 2.5)
12 Microsurfacing (Type II) over Scrub Seal (FA 2.5)
11 Microsurfacing (Type II) over Fibermat Chip Seal (FA 2.5)
10 Fibermat Chip Seal (FA 2.5)
9 Double Microsurfacing (Type II over Type II)
8 Microsurfacing (Type II w ith fibers))
7
6 Microsurfacing (Type-II) over Single Chip Seal (FA 2.5)
5 Triple Chip Seal (FA 2 over FA 2.5 over CA-50/70)
4 Double Chip Seal (FA 2 over FA 2.5)
3 Single Chip Seal (FA 2.5)
2 Construcited - 2010 Construcited - 2010
1 Crack Seal / Transverse Mastic Treatments - August 2016 Treatments - August 2016
0 Control - High IRI ABR - Asphalt Binderr Replacement
Passin
g
Drivin
g
City
of M
ilaca -
-->
(4 m
iles N
ort
h)
Rejo
ven
atin
g F
og
Seal w
ith b
lack d
iam
on
d d
ust
Co
nven
tion
al F
og
Seal w
ith b
lack d
iam
on
d d
ust
Mic
rosu
rfacin
g (T
yp
e II) o
ver c
rack s
eal a
nd
Tra
nsvers
e M
astic
Mic
rosu
rfacin
g (T
yp
e III) o
ver S
cru
b S
eal (F
A 2
.5)
Mic
rosu
rfacin
g (T
yp
e III) o
ver F
iberm
at C
hip
Seal (F
A 2
.5)
US-169
Northbound
CSAH-8
Op
en
MP 185.3
MP 186
MP 187D
ou
ble
Ch
ip S
eal (F
A 2
over F
A 2
.5)
City
of P
ease
Mic
rosu
rfacin
g (T
yp
e-III) o
ver S
ing
le C
hip
Seal (F
A 2
.5)
Sin
gle
Ch
ip S
eal (F
A2.5
) over C
rack S
eal / T
ran
svers
e M
astic
Trip
le C
hip
Seal (F
A 2
over F
A 2
.5 o
ver C
A-7
0)
MP 188
Single Chip Seal (FA2.5) over Crack Seal / Transverse Mastic
Microsurfacing (Type II) over Crack Seal / Transverse Mastic
1/10 mille Test Sections
TrafficLayers
7.5" HMA
PG58-28
12"
Granular
Base
Clay
Subgrade
400 ADT
Do
ub
le M
icro
su
rfacin
g (T
yp
e II o
ver T
yp
e II)
Fib
erm
at C
hip
Seal (F
A 2
.5)
Scru
b S
eal (F
A2.5
)
Sin
gle
Ch
ip S
eal (F
A 2
.5)
Cra
ck S
eal / T
ran
svers
e M
astic
US-169Not to Scale
Each Section
528 feet long
Section Numbering
169000
169001
so on
8001
8002
so on
Co
ntr
ol
Ult
ra T
hin
Bo
nd
ed
Weari
ng
Co
ars
e
Th
inla
y O
verl
ay (
4.7
5 m
m w
ith
RA
P a
nd
RA
S)
Delt
a S
Co
ntr
ol
Co
ntr
ol
Co
ntr
ol
Mic
rosu
rfacin
g (T
yp
e II)
Layers Traffic
Clay
Subgrade
7.5" HMA
PG58-28
12"
Granular
Base
1800 ADT
Co
ntro
l
National Pavement Preservation Study (Northern Test Sections)
Minnesota DOT Road Research Project (MnROAD)
National Center for Asphalt Technology (NCAT)
US-169 NB Lane
CSAH-8 EB and WB Lanes
5 miles South of Milaca - Just East of Pease - Mille Lacs County
Co
ntro
l
Co
ntro
l
Th
inla
y O
verl
ay (
4.7
5 m
m w
ith
RA
P a
nd
RA
S)
Th
inla
y O
verl
ay (
4.7
5 m
m)
Co
ntr
ol
Th
inla
y O
verla
y (A
BR
over C
hip
Seal (F
A 2
.5))
Th
inla
y O
verla
y (A
BR
over S
cru
b S
eal (F
A 2
.5))
Th
inla
y O
verla
y (A
BR
over fib
erm
at (F
A 2
.5))
NorthernHigh Traffic
Preservationon US-169
NorthernLow Traffic
PreservationCSAH-8
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Pre-Treatment Condition
4/26/2017 29
US-169Northbound Lanes
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Pre-Treatment Condition
4/26/2017 30
County State Aid Highway(CSAH-8)
EB and WB Lanes
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Treatment Condition (February 2017)
31
Construction Related
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Open Graded Friction Coarse “OGFC”
32
OGFC/PCC conventional tack OGFC/PCC ultrafuse tack
OGFC/HMA ultrafuse tack OGFC/HMA conventional tack
August 2016 – Hardrives Contractor
MnROAD – Low Volume Road
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NCAT Pavement Test Track
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Preservation Treatments/Combinations
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Pavement Preservation Benefits/Analysis
ConditionImprovingBenefit
Life ExtendingBenefit
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Test Section Layout - Assessment
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Test Sub-Sections
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Test Sub-Sections
Good: < 5%
Fair: 5 - 20%
Poor: > 20%
Utilizing FHWA Performance Measures
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Test Sub-Section Analysis(low severity data)
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Test Sub-Section Analysis(fair severity data)
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Test Sub-Section Analysis(poor severity data)
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Test Sub-Section Example
“Fair”
Condition
Improving
Benefit at
End of
Year 5
“Fair” Life Extending Benefit Not Yet
Defined
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Lee Road 159 Control Section
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Benefit of Crack Sealing
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Track Thinlay
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US-280 Conventional vs FiberMat Cape
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US-280 Scrub Cape True Healing
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Balanced Design RAP+RAS Thinlay
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RAP+RAS Thinlay Production
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RAP+RAS Thinlay on Cold Recycle Mix
CCPR
CIR
No Rutting
No CrackingFoam Emulsion
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Cracking Group (CG) Study
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Cracking Group (CG) Study
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Cracking Group (CG) Study
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Cracking Group (CG) Study
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Alabama Study Observations• Lee Road – 159 Initial Analysis Starting Place
• Developing the MAP-21 related benefit methodology• Curve development and expanding to all south, north locations
• Route and Seal – Good as a stand alone treatment• Overbanding – Good with Treatment Combinations• 3X Chips (High Vol) – Bleeding tendency• Thinlays good performance
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Minnesota Study Observations
• Early – only 2 winters• Thermal Cracking Observations• Snow Plow Damage
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QC/QA Preservation Testing
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58
http://www.omnicrete.com.au/road-safety-surfacing/
High Friction Surface Treatments
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2018 Pavement Research Partnership• $100k/year for Cracking Group (CG)
– Alabama DOT Lead
– Traffic continuation at MnROAD8 and NCAT8
– Design, QC, unaged, aged array of test results
– Support for implementation of suitable test(s)
• $50k/year for Preservation Group (PG)– Minnesota DOT Lead
– Data collection, management, analysis
– Life extending & condition improving benefits
– Specifications, best practices, testing protocols
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Thank You