R R ubber ubber P P avement avement A A ssociation ssociation Technical Advisory Board Meeting Technical Advisory Board Meeting 11 July 2002 11 July 2002 San Diego, California San Diego, California Arizona State Arizona State University University Asphalt Rubber Research Asphalt Rubber Research Kamil E. Kaloush Kamil E. Kaloush
AR Research Background at ASU Started July 2001 Obtain Typical Engineering Material Properties for AR Mixtures and Binders >>> 2002 Design Guide Compare the Laboratory Performance of AR Mixtures To Conventional ADOT Mixtures Special Studies: Field - Laboratory Comparison
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11 July 200211 July 2002San Diego, CaliforniaSan Diego, California
Arizona State UniversityArizona State University
Asphalt Rubber ResearchAsphalt Rubber Research
Kamil E. KaloushKamil E. Kaloush
AR Research AR Research Background at ASUBackground at ASU
Started July 2001Started July 2001 Obtain Typical Engineering Material Obtain Typical Engineering Material
Properties for AR Mixtures and BindersProperties for AR Mixtures and Binders >>> 2002 Design Guide>>> 2002 Design Guide
Compare the Laboratory Performance of AR Compare the Laboratory Performance of AR Mixtures To Conventional ADOT MixturesMixtures To Conventional ADOT Mixtures
Special Studies: Field - Laboratory Special Studies: Field - Laboratory ComparisonComparison
Research Research PartnersPartners
Arizona State UniversityArizona State University
11stst Project Project: : Jul 01 – Jun 02Jul 01 – Jun 02I-40 Buffalo Range I-40 Buffalo Range SectionsSections
Current Current ProjectsProjects
22ndnd Project Project: : Nov 01 – Nov 03Nov 01 – Nov 03I-17 Frontage Rd. I-17 Frontage Rd. AR Demonstration AR Demonstration ProgramProgram
Satisfy Research Satisfy Research NeedsNeeds
Project 2Project 2: PG Binder Specifications for AR : PG Binder Specifications for AR Binders.Binders.
Project 8Project 8: Database of Asphalt Rubber : Database of Asphalt Rubber Projects.Projects.
Project 10Project 10: Evaluate AR Using 2002 : Evaluate AR Using 2002 Design Guide Test Protocols.Design Guide Test Protocols.
Project 11Project 11: Laboratory and Field : Laboratory and Field EvaluationEvaluation
33rdrd Project Project: : Jul 02 – Jan 03Jul 02 – Jan 03Alberta AR Test SectionAlberta AR Test Section
Current Current ProjectsProjects
44thth Project Project: : ALF Test SectionALF Test Section
Asphalt-Rubber Asphalt-Rubber Technology Research Technology Research Center (ARTIC) Library Center (ARTIC) Library UpdateUpdate
Project 3Project 3: Document Merits of Asphalt : Document Merits of Asphalt Rubber ProductsRubber Products
One Stock Binder (58-22).One Stock Binder (58-22). Gap / Open Graded Mixes.Gap / Open Graded Mixes. Binder Tests.Binder Tests. Mixture Tests on HMA.Mixture Tests on HMA.
In-situ Air VoidsIn-situ Air Voids
I-40 Buffalo I-40 Buffalo RangeRange
I-40 MP 229
AR Demonstration AR Demonstration ProgramProgram
Acting as a Catalyst to Expand Acting as a Catalyst to Expand the Environmental Responsible Use of Crumb Rubber the Environmental Responsible Use of Crumb Rubber
Demonstrate the Use of Ground Tire Rubber in Demonstrate the Use of Ground Tire Rubber in Asphalt Pavement Construction Asphalt Pavement Construction
a ) I N D I R E C T T E N S I L E S T R E N G T H T E S T
F R A C T U R E E N E R G YT e m p 3 2 º F
2 5 62 9 5 3 3 0
0
1 0 0
2 0 0
3 0 0
4 0 0
A R - A C F C A R A C S R B P G 6 4 - 2 2Fracture Energy (lbs x
inch)
b ) I N D I R E C T T E N S I L E S T R E N G T H T E S TF R A C T U R E E N E R G Y
T e m p 1 4 º F
3 0 0 2 8 22 3 2
0
1 0 0
2 0 0
3 0 0
4 0 0
A R - A C F C A R A C S R B P G 6 4 - 2 2Fracture Energy (lbs x
inch)
c ) I N D I R E C T T E N S I L E S T R E N G T H T E S TF R A C T U R E E N E R G Y
T e m p 5 º F
2 0 8 1 8 81 2 1
0
1 0 0
2 0 0
3 0 0
4 0 0
A R - A C F C A R A C S R B P G 6 4 - 2 2Fracture Energy (lbs x
inch)
Fatigue Test Fatigue Test ResultsResults
Fatigue Relationship for ADOT Rubber Asphalt (Field & Lab) Mix &ADOT Salt River Base at Control Strain and 70 oF at 50% of Initial
Stiffness
100
1000
10000
1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
Cycles to Failure
Stra
in le
vel (
)
ARAC-FIELD 8%Va
ARAC-FIELD 5.5%Va
ADOT SRB 7%Va
ARAC-LAB 8.5%Va
ARAC-LAB 11%Va
AR-ACFC-LAB 18%Va
Gap – Open – Dense Gap – Open – Dense GradedGraded
Fatigue Relationship for ADOT Asphalt Rubber Mixes & ADOT Salt River Base Mix at Control Strain and 70 oF at 50% of Initial Stiffness
100
1000
10000
1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
N - Number of Repetitions
- F
lexu
ral S
train
(in
/in)
ADOT SRB 7%VaARAC-LAB 11%VaAR-ACFC-LAB 18%Va
SummaSummaryry
The The Conventional Binder TestsConventional Binder Tests are Adequate in are Adequate in Describing the Viscosity-Temperature Susceptibility Describing the Viscosity-Temperature Susceptibility ((A-VTSA-VTS) of Crumb Rubber Modified Binders.) of Crumb Rubber Modified Binders.
This A-VTS Relationship Also Appears to This A-VTS Relationship Also Appears to Relate to Relate to Observed Field Performance BehaviorObserved Field Performance Behavior. . LessLess Low-Temperature Low-Temperature CrackingCracking Good Good Resistance to RuttingResistance to Rutting at High Temperatures at High Temperatures..
SummaSummaryry
CorelokCorelok is a Useful Device for Measuring is a Useful Device for Measuring Mixture Air Voids, Especially ACFC MixesMixture Air Voids, Especially ACFC Mixes
E*E*AR MixesAR Mixes ~ E* ~ E* Conv. MixesConv. Mixes (Note Va %)(Note Va %)
Permanent DeformationPermanent Deformation (PD)Tests: > (PD)Tests: > ARAC Good Resistance to DeformationARAC Good Resistance to Deformation
SummaSummaryry
Tensile StrengthTensile Strength: No Advantages of AR Mixes : No Advantages of AR Mixes Strain at FailureStrain at Failure Fracture EnergyFracture Energy
were Better Indicators of Field Performancewere Better Indicators of Field Performance Fatigue Relationships:Fatigue Relationships: AR-ACFC and ARAC AR-ACFC and ARAC
Mixtures Provides Much Better Fatigue Life Mixtures Provides Much Better Fatigue Life Than Dense Graded PG 76-16 Mix. Than Dense Graded PG 76-16 Mix.
George Way, Julie Nodes, Doug Forstie, George Way, Julie Nodes, Doug Forstie, ADOTADOT Mark Belshe, Mark Belshe, FNF ConstructionFNF Construction Donna Carlson, Doug Carlson, Donna Carlson, Doug Carlson, RPARPA Andy Acho, Andy Acho, Ford Motor CompanyFord Motor Company Matthew Witczak, Matthew Witczak, ASUASU ASU Advanced Pavement Laboratory Staff / GRA’sASU Advanced Pavement Laboratory Staff / GRA’s
Kenny Witczak, Javed Bari, Mohammad Abojaradeh, Aleksander Zborowski, Kenny Witczak, Javed Bari, Mohammad Abojaradeh, Aleksander Zborowski, Andres SotilAndres Sotil