Asphalt Mixture Performance Tester - rmaces.org · Advanced Asphalt Technologies, LLC...
Transcript of Asphalt Mixture Performance Tester - rmaces.org · Advanced Asphalt Technologies, LLC...
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Mixture Performance Tester
Ramon Bonaquist, P.E.Chief Operating Officer
Advanced Asphalt Technologies, LLC
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Topics
• Development• Implementation Status• Uses• AMPT Resources
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
What is the AMPT?
• Machine specifically for asphalt concrete testing
• Measures engineering properties of asphalt concrete:o Dynamic Moduluso Flow Numbero Flow Time
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Why Do We Need It?
• Volumetric design alone is not always sufficiento High traffico Critical projectso Evaluate new materials
• Engineering properties needed for structural analysiso DARWin ME
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Marshall and Hveem design procedures included unreliable performance tests
Pre-SHRP
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Superpave
Level I
Level II
Level III
Marshall and Hveem design procedures included unreliable performance tests
Pre-SHRP
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Superpave
Level I
Level II
Level III
Marshall and Hveem design procedures included unreliable performance tests
Pre-SHRP
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Superpave
Level I
Level II
Level III
Marshall and Hveem design procedures included unreliable performance tests
Pre-SHRP
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Asphalt Concrete Mixture DesignPerformance Testing Evolution
Superpave
Level I
Level II
Level III
Marshall and Hveem design procedures included unreliable performance tests
Pre-SHRP
Wheel Tracking, Gyratory Compactor, Modulus, Creep, Repeated Load
Post SHRP NCHRP & FHWA Research
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Dynamic Modulus Test
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Dynamic Modulus Test
• Mixture Stiffness• Rutting• Fatigue Cracking Stress
Strain
Time
σ
εE*0
0=
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Flow Number Test
• Rutting
Stra
in
Stre
ss
Time
Time
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Flow Number Test
• Rutting
Stra
in
Stre
ss
Time
Flow Number
Strain Curve
Haversine Axial Compression
Time
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Flow Time Test• Rutting
Stra
in
Stre
ss
Time
Time
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Flow Time Test• Rutting
Stra
in
Stre
ss
Time
Time
Strain Curve
Flow Time
Constant Axial Compression
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
AMPT is Not Prototype Equipment!Research
Draft Test MethodPrototype Equipment
Verification
Improve
Test MethodEquipment
Ruggedness
Critical Aspects
Need
Round Robin Testing
Precision and Bias
Commercial Equipment
SpecificationFirst Article Equipment
Production Equipment
Provisional AASHTOTest Methods
Engineering PracticeTraining
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
AASHTO Standards
• PP60, Preparation of Cylindrical Performance Test Specimens Using the Superpave Gyratory Compactor
• TP79, Determining the Dynamic Modulus and Flow Number for Hot Mix Asphalt (HMA) Using the Asphalt Mixture Performance Tester (AMPT)
• PP61, Developing Dynamic Modulus Master Curves for Hot-Mix Asphalt Concrete Using the Asphalt Mixture Performance Tester (AMPT)
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Pooled Fund Study TPF-5(178)
• Implementation of the Asphalt Mixture Performance Tester (AMPT) for Superpave Validation
• Purchase AMPT’s for Participating Agencies• Develop and Deliver Training Course on AMPT
NHI Training Course 131118 Asphalt Mixture Performance Tester
• Coordinate Testing
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Pooled Fund Participation
TX
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
How Has AMPT Data Been Used?
• Mixture Designo Flow Numbero Dynamic Modulus
• Pavement Structural Designo Dynamic Modulus
• Materials Evaluationo High RAP Mixtureso RAS Mixtureso WMAo Additives and Modifiers
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Flow Number in Mixture Design• NCHRP Project 9-33, Mix Design Manual for HMA -Criteria for Minimum Flow Number
Traffic LevelMillion ESAL’s
Minimum FlowNumber Cycles
<3 ---
3 to <10 50
10 to <30 190
>30 740
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
E* in Mixture Design
• Quality Related Specifications (QRS) Softwareo Arizona State Universityo NCHRP-19 and 9-22o Interpolates Database of DARWin ME Solutions
• Uses Dynamic Modulus Master Curve
• Predicted Rut Depth
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Pavement Structural Design
DARWin MEo HMA Characterized by a Dynamic Modulus Master Curve Plant Aged Conditions
o Modulus Needed Stress-Strain Analysis Rutting Model Fatigue Cracking Model
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Colorado Local Calibration
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
RAP/RAS Mixing Analysis
• Recycled Mixture Homogentiy is Important
• Dynamic Modulus is Very Sensitive to Binder Stiffness
• Good Plant Mixing– Mixture Stiffness Consistent With Blended
Binder Stiffness
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
RAP/RAS Mixing Analysis
• Dynamic Modulus Master Curve for Plant Produced Mixture– As-Produced Stiffness
• Recovered Binder Master Curve Estimate Mixture Master Curve– Hirsch Model
• Mixture Modulus = f(Binder modulus, VMA, and VFA)– Fully-Blended Stiffness
• Compare
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Good Mixing
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Good Mixing
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Poor Mixing
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Poor Mixing
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Transportation Pooled Fund Study TPF-5(178)
www.pooledfund.orgSearch for Keyword “AMPT”
or Contact Jeff [email protected]
202-366-6429
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
SEAUPG AMPT User Group
http://www.eng.auburn.edu/center/ncat/SEAUPG/index.shtml
Thursday, April 19, 2012
Advanced Asphalt Technologies, LLC
“Engineering Services for the Asphalt Industry”
Questions/Discussion
Ramon BonaquistAdvanced Asphalt Technologies, LLC108 Powers Court, Suite 100Sterling, VA [email protected]
Thursday, April 19, 2012