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Warm Mix Asphalt
Technologies
Federal Highway Administration
Office of Pavement Technology
Washington DC, USA
Matthew Corrigan, P.E.Asphalt Pavement Engineer
National Initiatives
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Moving Ahead for Progress in the
21st Century Actwww.fhwa.dot.gov/map21/
Provides an array of provisions designed toincrease innovation and improve efficiency,effectiveness, and accountability in the planning,design, engineering, construction and financing oftransportation projects.
Building on FHWAs Every Day Counts initiative,MAP-21 changes will speed up the projectdelivery process, saving time and money forindividuals and businesses, and yielding broad
benefits nationwide.
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Research, Technology Deployment,
Training & Education
Highway Research & Development - $115.0 million*
Technology & Innovation Deployment - $62.5 million*
Training & Education - $24.0 million*
ITS Program - $100.0 million*
University Transportation Centers - $72.5 million*
Bureau of Transportation Statistics - $26.0 million* SHRP 2 implementation (funded as set aside of State
Planning and Research funds) - $TBD
*Annual $ Funding Levels
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Accelerates project delivery and promotes innovation.
Technology Innovation and Deployment Program $62.5 M per fiscal year (2013-14)
SHRP2 Implementation
Every Day Counts initiatives Demonstrations
Pilots and Testing
Accelerated Innovation DeploymentAt least $12 million per year of these funds must be used
to accelerate the deployment and implementation of
pavement technology.
www.fhwa.dot.gov/map21/tid.cfm
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Accelerating Technology Deployment
The Every Day Counts Initiative
Every Day Counts is NOT about inventing the next "bigthing". It is about taking effective, proven and market-
ready technologies and getting them into widespread
use. By advancing 21st century solutions, we can improve
safety, reduce congestion and keep America moving andcompetitive.
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Every Day Counts
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Every Day Counts 7
7
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The Every Day Counts Initiative
Warm Mix Asphalt (WMA)
www.fhwa.dot.gov/everydaycounts
Accelerating Technology Deployment
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1. By December 2011, 40 State DOTs and all Federal
Lands Highway Divisions will have a specification
&/or contractual language that allows WMA onFederal-aid or Federal Lands projects.
40 States + all FLHD (Complete)
2. By December 2012, at least 30 State DOTs willhave achieved set targets for WMA usage.
18 Total with set usage goals (as of Fall 2012)
Performance Metrics
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We saved over 30 million gallons offuel during production
We reduced CO2e by 800,000 tons Equivalent to taking 150,000 vehicles
off the road!
If used 100% WMA 10 x
In 2010, use of WMA estimated:
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General Technology CategoriesMaterial Processing
Ex. LEA (Hot Coated Coarse Agg + Moist Fine Agg + Additives)
Organic Additives
Waxes, Hydrocarbon Based Products
Chemical Additives
Surfactants
Foaming Processing
Water Injection, Zeolites
Hybrid Systems
example: H20 + Surfactant
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TechnologyOverview**
**Federal Highway Administration does not endorse or promote any particular proprietary product or technology.
Many US technologies web-linked at:
http://warmmixasphalt.com/wmatechnologies.aspx
This listing does NOT constitute an
endorsement or approval.
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StakeholderEngagement:
WMATechnicalWorkingGroupFHWA
NAPA
Industry
State DOT
State APANCAT
AASHTO
Labor
NIOSH
Co-Chairs:
Matthew Corrigan
Ron White
Established in 2005Adjourned in 2012
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FHWA Commitment to Stakeholder Engagement
in the Pavement & Materials ProgramAsphalt
Pavements
Mixture ETG
WMA
Task Group
RAP/RASTask Group
PerformanceTesters TG
ConstructionTask Group
Binder ETG
MSCR
Task Group
LinearAmplitudeSweep TG
GTRTask Group
Others asNeeded
Models ETGSustainability
ETG
Concrete
Pavements
Executive ETG Engineer ETG
Roadmap
Track Team
RoadmapTrack Team
RoadmapTrack Team
14
PavementPreservation
ETG
RPUGSurface
Characteristics
AASHTO JTP
DGIT
AASHTO
Subcommittees
MaterialsMaintenanceConstruction
IRI ETG
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9-43 $522,501 completed
9-47 $79,000 completed9-47A $1,121,000 Jan 2013
9-49 $450,000 Jun 2013
9-49A $900,000 Jul 20169-52 $800,000 Dec 2014
9-53 $700,000 Sept 2014
9-54 $800,000 begin 2013
9-55 $600,000 begin 2013
20-07 (311) $50,000 completed
Total $6,022,501
NCHRP Projects funded as a result of WMA TWG efforts:
--Mix Design Practices for WMA
--Engineering Properties, Emissions, andField Performance of WMA Technologies
--Properties and Performance of WMA
Technologies
--Performance of WMA Technologies:
Stage I--Moisture Susceptibility--Performance of WMA Technologies:
Stage II--Long-Term Field Performance--Short-Term Laboratory Conditioning of
Asphalt Mixtures
--Properties of Foamed Asphalt for Warm
Mix Asphalt Applications
--Long-Term Aging of Asphalt Mixtures for
Performance Testing and Prediction
--Recycled Asphalt Shingles in Asphalt
Mixtures with WMA Technologies
--Development of a WMA
Tech. Evaluation Program
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NCHRP 9-43 Mix Design Practices for WarmMix Asphalt $500,000
NationalResearchInitiatives
http://www.trb.org/default.asp -
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Products:
Appendix to AASHTO R35 with commentary SpecialMixture Design Considerations and Methods for Warm
Mix Asphalt (WMA)
WMA Mix Design Workshop/Training Module
Being converted to web based training thru NHI
Chapter on WMA Mix Design for the NCHRP Project
09-33 Mix Design Manual
Standard Practice For Measuring Properties of WarmMix Asphalt (WMA) for Performance Analysis Using the
AASHTO MEPDG (AASHTO DARWin-ME Software)
NCHRPProject09-43
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Resourcewww.ct.gov/dot/AASHTO-R35
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19
Course Number:
FHWA-NHI-131137
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Appendix to AASHTO R35 with commentary Special
Mixture Design Considerations and Methods for
Warm Mix Asphalt (WMA)
Approved by AASHTO
Subcommittee on Materials
and published:Standard Specifications for
Transportation Materials and
Methods of Sampling andTesting (32nd Edition, 2012)
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HMA
330F
WMA
240F
Mix Design Considerations
i ll il bl b i i
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CommerciallyAvailableLaboratoryFoamingDevices
InstroTek, Inc. AccuFoamer
PTi THE FOAMER
Wirtgen, WLB 10 S
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NCHRP 20-07/ Task 311, Development of a
Warm Mix Asphalt Technology Evaluation
Program (complete)
Myers McCarthy Consulting Engineers, LLC
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.
asp?ProjectID=3075
AASHTO NTPEP Panel has been established toreview findings: www.ntpep.org
POC: Tom Baker, Washington State DOT
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3075http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3075http://www.ntpep.org/http://www.ntpep.org/http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3075http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3075http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3075 -
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Warm-Mix Asphalt:
Best Practices, 3nd Edition Stockpile Moisture Management
Burner Adjustments and
Efficiency
Aggregate Drying and BaghouseTemperatures
Drum Slope and Flighting
Combustion Air
RAP usage Placement Changes
Quality Improvement Series 125
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State DOT WMA Usage - 2006
VI
VT
RI
MANH
CT
NJ
DE
MD
DC
CA
AZ
CO
NM
TX
OKAR
LA
MOKY
ALGA
FL
VA
OH
MI
AK
MT
NV
Guam
ME
WA
OR
UT
KS
IDWY
ND
SD
MN
NE
WI
IA
ILIN
MS
TN
SC
NC
WV
PA
NY
PR
HI
Mobile Asphalt Testing Laboratory ProgramWMA Project Locations
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State DOT WMA Usage - 2012
VI
VT
RI
MANH
CT
NJ
DE
MD
DC
495
CA
AZ
CO
NM
TX
OKAR
LA
MOKY
ALGA
FL
VA
OH
MI
AK
MT
NV
Guam
ME
WA
OR
UT
KS
IDWY
ND
SD
MN
NE
WI
IA
ILIN
MS
TN
SC
NC
WV
PA
NY
PR
HI
Mobile Asphalt Testing Laboratory ProgramWMA Project Locations
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CT
NJDE
MD
DC
78
I-WMA
495
CA
AZ
CO
NM
TX
OKAR
LA
MOKY
ALGA
FL
VA
OH
MI
VTAK
VI
MT
NV
ME
WA
OR
UT
KS
IDWY
ND
SD
MN
NE
WI
IA
IL IN
MS
TN
SC
NC
WV
PA
NY MANH
PR
RI
90
70
35
10
37
30
40
820
75
5
75
55
94MnROAD
495
70
65465
15
90
8781
86
95
10 295
VT
VI
MANH
RI
295
Interstate Highway WMA Usage
HI
Guam
66
81
/
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WMA Usage in HMA/WMA
16.8
million
tons
41.1
million
tons
0%
5%
10%
15%
20%
25%
2009 2010 2011 2012
5%11%
19%
68.7
million
tons
data
being
collected
Percentage ofTotalMix Production in USA
2006WMA trials
begin
Source: draft NAPA annual survey presented during Feb. 2013 NAPA Annual Meeting
358.4 359.8 366.0Total HMA/WMA mix:(million tons)
b h l
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Organic Additive
Additive Foaming
Chemical Additive
Plant Foaming
0
20
40
60
80
100
20092010
2011
Source: draft NAPA annual survey presented during Feb. 2013 NAPA Annual Meeting
WMA Usage by TechnologyPercentof market for WMA production in USA
RAS U i HMA/WMA
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RAS Usage in HMA/WMA
701
thousand
tons
1,099
thousand
tons
0
200
400
600
8001,000
1,200
1,400
1,600
2009 2010 2011 20121,192
thousand
tons
data
being
collected
Source: draft NAPA annual survey presented during Feb. 2013 NAPA Annual Meeting
Total asphalt mix: 358.4 359.8 366.0(million tons)
TotalRAS tons used for mix production in USA
RAP U i HMA/WMA
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RAP Usage in HMA/WMA
67.2
million
tons
73.5
million
tons
0%
5%
10%
15%
20%
25%
2009 2010 2011 2012
19% 20% 22%
79.1
million
tons
data
being
collected
Percentage ofTotalMix Production in USA
Source: draft NAPA annual survey presented during Feb. 2013 NAPA Annual Meeting
Total HMA/WMA mix: 358.4 359.8 366.0(million tons)
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NCHRP 9-54: Long-Term Aging of Asphalt Mixtures forPerformance Testing and Prediction
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp
?ProjectID=3400
RFP close date: 10/18/2012
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp
?ProjectID=3401
RFP close date: 11/14/2012
NCHRP 9-55: Recycled Asphalt Shingles in Asphalt
Mixtures with WMA Technologies
NationalResearchInitiatives
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3400http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3400http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3401http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3401http://www.trb.org/default.asphttp://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3401http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3401http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3400http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3400http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3400 -
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Research Needs Statement for
proposed 2014 NCHRP 09-xx project:
Recycling Agents Used For Asphalt
Mixtures Containing High Recycled
Asphalt Binder Ratios
NationalResearchInitiatives
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Items for continued involvement:
Standardize reheating procedure for WMA
mixtures for volumetric and performance tests?
Use of RAS, RAP, GTR, alternate binders, and
combinations used with WMA technologies?
Low temperature applications w/ high percentages?
Rejuvenating agents marketed as WMA?
Use of WMA to remove SMA fiber requirements?
Incentives and motivation for improved density?
Increased density requirements on WMA?
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Conditioning for WMA performance testing?
Need for WMA specific mix design? (AASHTO R-35)
Incorporate impact of aggregate absorption?
Short term and long term?
Need for laboratory foaming equipment?
Evaluation of asphalt foam characteristics? Are unique foam properties provided or simply
volume expansion & improved coating?
Local agency WMA acceptance
and training?
Items for continued involvement:
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Every Day Counts 36
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Every Day Counts 37
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Every Day Counts 38
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Thank You!
Matthew Corrigan, P.E.Asphalt Pavement Engineer
hi C