Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve...
Transcript of Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve...
![Page 1: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/1.jpg)
Asphalt Technology Guidance Program
(ATGP)
Ohio Transportation Engineering ConferenceOctober 10, 2017
Long-Life Asphalt Pavement for the 21st Century
Office of Asset Management,
Pavements, & Construction
![Page 2: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/2.jpg)
Agenda
• FHWA Pavement and Materials
• Trailer Activities
• Aggregate Imaging System (AIMS)
• Asphalt Mixture Performance Tester (AMPT)
• Questions and Tour
2
![Page 3: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/3.jpg)
Pavement & Materials Discipline
• Program Office
– Office of Asset Management, Pavements, and Construction (FHWA HQ, Washington, DC)
• ATGP: Mobile Asphalt Testing Trailer (MATT) and Asphalt Binder Testing Laboratory (ABTL)
3
![Page 4: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/4.jpg)
Pavement & Materials Discipline
• Program Office
– Office of Asset Management, Pavements, and Construction (FHWA HQ, Washington, DC)
• ATGP: Mobile Asphalt Testing Trailer (MATT) and Asphalt Binder Testing Laboratory (ABTL)
• Research and Development
– Office of Infrastructure R&D (Turner-Fairbank Highway Research Center, McLean, VA)
4
![Page 5: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/5.jpg)
Pavement & Materials Discipline
• Program Office
– Office of Asset Management, Pavements, and Construction (FHWA HQ, Washington, DC)
• ATGP: Mobile Asphalt Testing Trailer (MATT) and Asphalt Binder Testing Laboratory (ABTL)
• Research and Development
– Office of Infrastructure R&D (Turner-Fairbank Highway Research Center, McLean, VA)
• Technical Services (Resource Centers)
– Atlanta, Baltimore, Chicago, Denver
5
![Page 6: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/6.jpg)
Pavement & Materials Discipline
• Program Office
– Office of Asset Management, Pavements, and Construction (FHWA HQ, Washington, DC)
• ATGP: Mobile Asphalt Testing Trailer (MATT) and Asphalt Binder Testing Laboratory (ABTL)
• Research and Development
– Office of Infrastructure R&D (Turner-Fairbank Highway Research Center, McLean, VA)
• Technical Services (Resource Centers)
– Atlanta, Baltimore, Chicago, Denver
• Division Offices (nationwide) 6
![Page 7: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/7.jpg)
MATT Program History
• Projects began in 1988
– DP 74: Field Management of Asphalt Mixes Using Volumetric Quality Control
• Transition to Superpave implementation
– Early-1990s
– Classroom and hands-on training
• Transition to performance-related specifications
– Shadow testing
– AMPT user since 2003!
• Innovative materials and practices
– WMA, GTR, RAP/RAS, increased density7
![Page 8: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/8.jpg)
MATT in Ohio
• 1988 – Standard Materials, Jackson
– DP 74: Field Management Using Volumetric Quality Control
• 1994 – Ohio DOT, Columbus
– Superpave Level 1 Training
• 1995 – STONECO, Marion
– SPS-9 Project: Level 1 Superpave
• 2017 – Here and now!
8
![Page 9: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/9.jpg)
9
Program Objective
• Provide Support to National Initiatives
– Increased Pavement Density
– Increased RAP/RAS Usage
– Understanding Asphalt Rubber Testing
– Mixture Performance Testing and the AMPT
– Stone Matrix Asphalt
– Binder Performance Testing
– Long-Term Aging
![Page 10: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/10.jpg)
MATT Technology
• Equipment Development & Refinement
– Simple Performance Tester (SPT)
• Evaluation and Refinement of Innovative
Contracting Concepts
• Development of New QA Concepts for HMA
• Advanced Rapid Test Tools
– AIMS, CoreLok, CoreDry
10
![Page 11: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/11.jpg)
11
Routine Project Site Activities
•Material Characterization
•Mix Design Replication and Testing
•Mix Production Testing
![Page 12: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/12.jpg)
Binder Tests and Analysis
12
![Page 13: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/13.jpg)
Binder Characterization
TEST PROCEDURES EQUIPMENT
• RV
• DSR
• RTFO
• PAV
• Vacuum Degassing Oven
• BBR
• DTT
• ABCD
• Torsional bar testing
13
• Performance Grading
– AASHTO M 320
– AASHTO M 332 (MSCR)
– AASHTO R 49 (Low Temperature PG)
• Solubility & Separation
– AASHTO T 44
– ASTM D7173
![Page 14: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/14.jpg)
Additional DSR Testing
• Parallel Plate (PP) Geometry
– Frequency Sweep (Master Curve)
– Linear Amplitude Sweep (AASHTO TP 101)
– 4mm test
• Cylindrical Geometry
– Viscosity: AASHTO T 316
– Asphalt Rubber Testing
14courtesy of Anton Paar & TA Instruments.
![Page 15: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/15.jpg)
DSR Testing Alternative: Asphalt Rubber Binder
Can it fit within existing PG grading system?
• DSR Testing Geometry
– Caltrans, University of California Pavement Research Center, Anton Paar
– Concentric Cylinder (CC) development testing evaluation looks promising
– CC test geometry may overcome specimen preparation limitations of PP geometry
– Draft AASHTO standard in development
15
![Page 16: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/16.jpg)
• Advantage– GTR modified asphalt can be measured with
particle sizes up to 2 mm
– No trimming problems and filling problems
– No edge effects 16
Concentric Cylinder Geometry
courtesy of Anton Paar
![Page 17: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/17.jpg)
Rheological Properties:Master Curve
• Rheological parameter:
– Rheological index (R value)
– Crossover frequency (ωc)
– Glover-Rowe (G-R)
• These parameters can be interrelated from understanding the relationship between loading time (or frequency) and temperature.
17
![Page 18: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/18.jpg)
Extended Aging
Do current procedures provide similarly aged material compared to long term aging in the field?
• Binder: PAV procedure (AASHTO R 28)
– ETG task force evaluating 40 h PAV
– Rheological parameters are used to assess
• Mixture: Oven aging (AASHTO R 30)
– NCHRP 9-54 is underway to investigate the need for extended aging
18
![Page 19: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/19.jpg)
Long Term Conditioning:
19
Master Curve - PG 76-22 Asphalt Rubber
• More conditioning causes the master curves to become flatter with R increasing and ωc decreasing.
![Page 20: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/20.jpg)
Low Temperature BBR Test:Binder New Parameter (∆Tc)
• ∆Tc is the difference between the critical low temperature determined by stiffness and relaxation criteria from BBR test
– ∆Tc = S critical temp - m critical temp
• As an asphalt binder ages, ∆Tc value becomes more negative
– Indicating a loss of relaxation properties
• Important parameter related to asphalt binder durability
• Threshold of -5°C being evaluated
20
![Page 21: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/21.jpg)
Low Temperature ABCD Test:AASHTO TP 92
• Asphalt Binder Cracking Device (ABCD)
– Cracking Temperature
– Fracture Stress
– Low Temperature Grade
21
courtesy of EZ Asphalt Technology.
![Page 22: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/22.jpg)
Long Term Conditioning:Low Temperature - PG 76-22 Asphalt Rubber
• Reasonable agreement between the three measurements for 20 hours PAV conditioning
• Doubling PAV time:
– 1.1 °C ↑ of cracking temp (ABCD)
– 3.2 °C ↑ of cracking temp (Table 1)
– 1.9 °C ↑ of cracking temp (Table 2) 22
PAV
Conditioning
Time
(h)
AASHTO M
320 Table 1
Intermediate
Temperature
Continuous
Grade
(°C)
AASHTO M
320 Table 1
Low
Temperature
Continuous
Grade
(°C)
AASHTO M
320
Table 1
∆ Tc
(°C)
AASHTO M
320 Table 2
Critical
Cracking
Temperature
(°C)
ABCD Low
Temperature
Grade
(°C)
ABCD
AASHTO TP
92
Cracking
Temperature
(°C)
20 18.5 -27.7 -2.3 -27.7 -28.6 -35.5
40 18.5 -24.5 -5.2 -25.8 -27.7 -34.4
![Page 23: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/23.jpg)
Aggregate and Volumetric
Testing and Analysis
23
![Page 24: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/24.jpg)
Aggregate Characterization
• Physical Properties, AASHTO M-323– Sieve Analysis – AASHTO T 11 & T 27
– Specific Gravity & Absorption – AASHTO T 84 & T 85
– Flat & Elongation – ASTM D4791
– CA Angularity – AASHTO T 335
– FA Angularity – AASHTO T 308
– Sand Equivalent – AASHTO T 176
– Shape & Texture (AIMS) – AASHTO PP 64 & TP 81
• Angularity
• Shape
• Texture
24
![Page 25: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/25.jpg)
25
Masad et al. (2003)
TP 81-12
AIMS
![Page 26: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/26.jpg)
AIMS Output - Example
26
Low HighMedium
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20
% o
f P
art
icle
s
AIMS Form2D
AIMS Form2D Distribution
0.075 (#200)_RAP 0.15 (#100)_RAP
0.30 (#50)_RAP 0.60 (#30)_RAP
1.18 (#16)_RAP 2.36 (#8)_RAP
Low Medium High
0
10
20
30
40
50
60
70
80
90
100
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
% o
f P
art
icle
s
AIMS Angularity Index
AIMS Angularity Distribution
0.075 (#200)_RAP 0.15 (#100)_RAP
0.30 (#50)_RAP 0.60 (#30)_RAP
1.18 (#16)_RAP 2.36 (#8)_RAP
4.75 (#4)_RAP 9.5 (0.375)_RAP
12.5 (0.50)_RAP 19.0 (0.75)_RAP
Low Medium High
0
10
20
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600 700 800 900 1000
% o
f P
art
icle
s
AIMS Texture Index
AIMS Texture Distribution
4.75 (#4)_RAP 9.5 (0.375)_RAP
12.5 (0.50)_RAP 19.0 (0.75)_RAP
LowMedium High
0
10
20
30
40
50
60
70
80
90
100
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
% o
f P
art
icle
s
AIMS Sphericity (SP)
AIMS Sphericity Distribution
4.75 (#4)_RAP
9.5 (0.375)_RAP
12.5 (0.50)_RAP
19.0 (0.75)_RAP
![Page 27: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/27.jpg)
27
1:5
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Elo
ngation R
atio (
Inte
rmedia
te/L
ong)
Less E
longate
d �
Flatness Ratio (Short/Intermediate) Less Flat �
4.75 (#4)_RAP 9.5 (0.375)_RAP
12.5 (0.50)_RAP 19.0 (0.75)_RAP
Elongation vs Flatness
AIMS Output - Example
![Page 28: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/28.jpg)
28
FAA
CAA –fractured faces
F&E (3:1 & 5:1)
Aggregate
Type
AIMS TP 81 ASTM D 5821
CAA RankCAA
RankCAA
Rank
(+1) (+2)
#7 2637 4 100 1 100 1
#8 2954 1 100 1 100 1
Birdseye 2762 3 100 1 100 1
#10 Wash 2834 2 -- -- -- --
RAP 2585 5 98 2 95 2
Aggregate
Type
AIMS TP 81 ASTM D 4791
F&E
(3:1)Rank
F&E
(5:1)Rank
F&E
(3:1)Rank
F&E
(5:1)Rank
#7 22.2 4 3.0 4 0 1 0 1
#8 27.7 5 9.3 5 0 1 0 1
Birdseye 7.8 3 0.0 1 -- -- -- --
#10 Wash 1.6 1 0.6 2 -- -- -- --
RAP 6.9 2 1.5 3 0 1 0 1
Aggregate
Type
AIMS TP 81 AASHTO T 304
FAA Rank FAA Rank
#7 3009 4 44.8 4
#8 2899 5 45.1 3
Birdseye 3166 1 44.5 5
#10 Wash 3164 2 50.6 1
RAP 3017 3 46.5 2
![Page 29: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/29.jpg)
Mix Design Replication
• Use Plant Site Materials
29
![Page 30: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/30.jpg)
Mix Design Replication
30
•Mixing, Aging, Compacting
![Page 31: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/31.jpg)
Mixture Production Testing
31
Asphalt Mixture Sample
Volumetric Properties
Pb – Ignition (T 308)
Gradation – (T 30)
Gmm – Rice (T 209)
Gmb – (T 166)
- Corelok (T 331)
- Gilson SG 4 (TP 82)
Performance Testing
Dynamic Modulus (TP 79)
- Unconfined
Flow Number (TP 79)
- Confined
- Unconfined
Cyclic Fatigue (TP 107)
![Page 32: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/32.jpg)
Gilson SG-4
• AASHTO TP 82 “Bulk Specific Gravity of Compacted Bituminous Mixtures Using Water Displacement Measured by Pressure Sensor”
32Courtesy of Gilson Company, Inc.
![Page 33: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/33.jpg)
Corelok
AASHTO T 331 – “Bulk Specific Gravity (Gmb) and Density of Compacted Hot Mix Asphalt (HMA) Using Automatic Vacuum Sealing Method”
33CoreLok, courtesy of InstroTek, Inc.
![Page 34: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/34.jpg)
Rapid Test Tools
CoreDry
• ASTM D7227– “Standard Practice for Rapid Drying of
Compacted Asphalt Specimens by using Vacuum Drying Apparatus”
• Rapid Vacuum Drying
– Alternating cycles of Vacuum and Heating
• Maintains Sample at Room Temperature
34
![Page 35: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/35.jpg)
Mixture Performance Testing
and Analysis
35
![Page 36: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/36.jpg)
Performance Characteristics
• Asphalt Mixture Performance Tester
IPC Global
36
![Page 37: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/37.jpg)
AMPT – addressing a need
• Late 1980s-Early 1990s: Strategic Highway Research Program• Superpave mixture design approach
• Performance grade binders
• But no viable performance tests for mixture
• National Cooperative Highway Research Program• 9-19: Identify simple performance tests for Superpave (rutting,
fatigue)• Dynamic modulus, flow number, flow time
• 9-29: Produce test methods and prototype, conduct ruggedness and interlaboratory studies• Simple Performance Tester (now known as AMPT) was born!
37
![Page 38: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/38.jpg)
AMPT
• Temperature range from about 4°to 70°C
• Computer-controlled device
• Software built-in for various test procedures
• Fundamental tests
• Stress and strain modeling
• “Bulk testing”
• Pavement ME
• Kits available for other tests
38
![Page 39: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/39.jpg)
39
AMPT Overview
![Page 40: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/40.jpg)
40
Gauge Point Gluing System
![Page 41: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/41.jpg)
Dynamic Modulus Test
• Mixture Stiffness• Rutting• Fatigue Cracking
41
Stress
Strain
σ ε00
lΤ
Τp
Time
σ
εE*
0
0=
Dynamic Modulus Phase Angle
Τ
Τφ
p
l= (360)
![Page 42: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/42.jpg)
Reduced Frequency, Hz
Dynamic Modulus Master Curve
10,000,000
1,000,000
100,000
10,000
1,000
E*,psi
115°F
70°F
40°F
FIT
1.0E-06 1.0E-04 1.0E-02 1.0E+00 1.0E+02 1.0E+04 1.0E+06
E*min=4,259 psi
E*max=3,376,744 psi
R2= 0.9978Se/Sy= 0.038 3
2
1
0
-1
-2
-3
Log S
hift Fact
or
0 50 100 150
Temperature
42
![Page 43: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/43.jpg)
AMPT Cyclic Fatigue
• Fundamental, repeated loading test
• Direct tension (pull-pull)
• Small-specimen testing available
• AASHTO TP 107 – revisions out for ballot!
• Material behavior across all possible
loading conditions!
43
![Page 44: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/44.jpg)
AMPT Cyclic Fatigue Process
Preparation
- Cylindrical specimen
- 100 mm x 130 mm
- Small-specimen: 38 mm x 110 mm
- End plate gluing, clamp system being
explored
- 2-3 days for mix
Testing
- Dynamic modulus fingerprint for specimen
variability
- Pull-pull fatigue test
- Strain level based on TFHRC database
- Test temperature based on location of
interest
- Load until crack forms
- 1-2 days for mix
Analysis
- AMPT automatically captures data for
analysis
- Calculate damage via spreadsheet or software
- Assign mixture rankings or use
pavement prediction software
- 1-2 hours for mix
44
![Page 45: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/45.jpg)
AMPT Cyclic Fatigue field
validation
• Pavement prediction software built from models
• Field validation
• 59 mixtures
• 55 different pavement structures
• Develop laboratory-to-field transfer functions
• Built for use in a PRS framework…
45
![Page 46: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/46.jpg)
AMPT Cyclic Fatigue advantages
• Standard sample preparation
• AASHTOWare Pavement ME compatible
• Ruggedness, precision and bias underway
• Commercial software available
• Spreadsheet analysis & formulation available
• Predicts performance!
• Material behavior across all possible loading/temperature conditions!
46
![Page 47: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/47.jpg)
AMPT implementation
• Transportation Pooled Fund Study (TPF(5)-178)• Purchase, installation of 29 AMPTs • NHI Course (over 80 trainees)• Interlaboratory study on effect of air voids• National workshop• Equipment specification, and others!
• Test standard development, improvement, and revision
• Instructional videos, TechBriefs
• PRS shadow implementation (TFHRC-led)
• MATT projects/training
• User Groups at TRB and regional meetings47
![Page 48: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/48.jpg)
AMPT Users Groups
• National/International
• TRB Annual Meeting
• Discussion of issues, best practices, future efforts
• 164 members, 28 DOTs present
• Regional
• User-Producer Groups
• State Asphalt Paving Assoc. meetings
48
![Page 49: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/49.jpg)
MATT Staff
• Federal Highway Administration (FHWA HQ)
– Matthew Corrigan, Sr. Asphalt Pavement Engineer
– David Mensching, Asphalt Pavement Engineer
• ESC, Inc. (FHWA Contractor)
– Chuck Paugh, Senior Project Manager
– Mary Luz Echeverria, Project Administrator
– Amir Golalipour, Baron Colbert, Satish Belagutti, Project Engineers
– Warren Day, Anthony Fernandez, Steve Portillo, David Heidler, Laboratory Technicians
49
![Page 50: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/50.jpg)
Technical assistance
• If you have upcoming projects where you’d like MATT technical assistance, contact:
– Dave Mensching, [email protected], 202.366.1286
– Matt Corrigan, [email protected], 202.366.1549
– Chuck Paugh, [email protected], 202.366.6640
50
![Page 51: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/51.jpg)
• Trailer is parked outside!
• Come in for a tour!
• We’re here to assist! Please stop by anytime for more discussion.
• Questions?
Closing notes
51
![Page 52: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/52.jpg)
Mix Design Replication
Mix Design Replication
3 Points
Performance Test Specimens
• 4 Replicates per Pb
Ignition Furnace Correction Factor
52
![Page 53: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/53.jpg)
Mixture Production Testing• Volumetric Determination
– Pb
– VMA
– Va
– VFA
– Pbe / 0.075 mm
53
![Page 54: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/54.jpg)
HMA Production Testing
HMA Sample
• Pb
• Ignition• Gradation• T 30• Gmm
• Gmb
• T 166• CoreLok
• Performance Specimens• 4 - Replicates
• Dynamic Modulus (E*)• Unconfined
• Flow Number• Unconfined
54
![Page 55: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/55.jpg)
Performance Sample Preparation
55
![Page 56: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/56.jpg)
IPC ServoPac
• ServoPac Gyratory Compactor
– Capable of measuring Shear Resistance
– Compacts tall specimens required for fabrication of SPT specimens
Additional HMA Technology
ServoPac Shear
Mix Design Replication Volumetrics
400
410
420
430
440
450
460
470
480
490
500
0 20 40 60 80 100 120 140 160
Gyrations
Sh
ea
r
56
![Page 57: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/57.jpg)
ServoPac Gyratory CompactorServoPac Shear
Mix Design Replication Volumetrics
400
410
420
430
440
450
460
470
480
490
500
0 20 40 60 80 100 120 140 160
Gyrations
Sh
ear
57
![Page 58: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/58.jpg)
Extrapolation vs Full Height
1.10
1.12
1.14
1.16
1.18
1.20
1.22
1.24
1.26
1.28
1.10 1.12 1.14 1.16 1.18 1.20 1.22 1.24 1.26 1.28
Internal Angle - Full Height Specimen (deg)
Inte
rna
l A
ng
le -
Ex
tra
po
late
d
(de
g)
AFG1A
AFGC 125X
Interlaken
Test Quip
1:1 Line
"+0.02" line
"-0.02" line"Best Fit" line:
y = 0.9554 x + 0.0493
r2 = 0.916
58
![Page 59: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/59.jpg)
Extrapolation
DAV Loaded Angle at Top of Specimen
Specimen Height DAV angle Date Specimen
36 mm 1.218 degrees 22-Jul-2002 DAV4-2
37 mm 1.216 degrees 22-Jul-2002 DAV4-4
36 mm 1.206 degrees 22-Jul-2002 DAV4-6
70 mm 1.192 degrees 22-Jul-2002 DAV4-8
70 mm 1.191 degrees 22-Jul-2002 DAV4-10
70 mm 1.181 degrees 22-Jul-2002 DAV4-12
DAV Loaded Angle at Bottom of Specimen
Specimen Height DAV angle Date Specimen
27 mm 1.221 degrees 22-Jul-2002 DAV4-1
27 mm 1.214 degrees 22-Jul-2002 DAV4-3
27 mm 1.209 degrees 22-Jul-2002 DAV4-5
61 mm 1.207 degrees 22-Jul-2002 DAV4-7
61 mm 1.196 degrees 22-Jul-2002 DAV4-9
61 mm 1.192 degrees 22-Jul-2002 DAV4-11
• 2 Heights – top & bottom
59
![Page 60: Asphalt Technology Guidance Program (ATGP) · • Physical Properties, AASHTO M-323 – Sieve Analysis – AASHTO T 11 & T 27 – Specific Gravity & Absorption – AASHTO T 84 & T](https://reader030.fdocuments.in/reader030/viewer/2022040207/5e1a7b045b728b588f3e7d53/html5/thumbnails/60.jpg)
Rapid Test Tools
CoreLok• Marketed by Instrotek Inc.
• Versatile device– Gmm (ASTM D6857)
– Gmb (AASHTO T 331, ASTM D6752)
– Gsb – for CA & FA
– Effective Porosity (ASTM D7063)
• Vacuum Sealing Procedure
• NCAT Ruggedness Study
• Round-Robin to establish AASHTO Precision Statement
60