2017 NEPPP Conference
2017 NEPPP Conference
A-PS-IN10.05.15
HTS FRAC Overview
High tensile strength aramid fibers No required changes to job mix formula Positive impact on field compaction Laboratory studies show improved resistance to rutting and cracking • Field data from in service projects confirming laboratory findings • • • •
HTS FRAC provides a cost effective solution to extend pavement service life
High Tensile Strength Fiber
Filler material characteristics Chemically Inert Non-Corrosive Non-Absorbent
Aramid High Tensile Strength Non-Corrosive High Temperature Resistance
Physical Characteristics of Aramid Materials
Aramid
Form
Monofilament Fiber
Specific Gravity
1.41 to 1.45
Tensile Strength
3000(Mpa) / 400,000psi
Length
19.05(mm) / ¾”
Natural Color
yellow
Acid/Alkali Resistance
inert
Decomposition Temperature (°F)
853
High Tensile Strength Fiber
19,400,000 aramid fibers at ¾” long (PER TON) converts to 229.6 miles or 1,212,288 linear feet of aramid fiber (PER TON) One cubic foot of pavement would contain 16.5 miles or 87,120 linear feet of aramid fiber
3D reinforcement in pavement
Mechanical not chemical
HTS FRAC
• No change to Job Mix formulas in most cases • Fiber does not need to be included in the mix design process
HTS FRAC Does not effect volumetrics
HTS FRAC
Does not negatively effect compaction, in some cases HTS helped to achieve compaction faster
HTS FRAC
States with FRAC specs
Georgia DOT Ohio DOT Pennsylvania DOT Fiber approved on QPLs for each state
Specifications
(g) Aramid Fibers. Use only aramid fibers listed in Bulletin 15 and approved for use in HMA, meeting the physical requirements of TABLE 1. Certify each shipment of aramid fibers according to Section 106.03(b). Add Aramid fibers at a rate of 2.0 to 2.5 ounces of Aramid fiber per ton of mix. Aramid fibers may be packaged in loose form with other inert material, or packaged in a bundled form coated with wax (or other inert material) to aid in dispersion of the aramid fibers into the mixture.
Ohio Specifications 826.02 Fibers. Use fibers specifically manufactured and drawn for use in asphalt concrete mixes. Use the specified fiber type conforming to the following requirements:
Furnish Type C fibers intended for use in asphalt concrete mixes. Ensure Type C fibers are blended with 3/4 inch (19 mm) fibrillated polyolefin fibers or wax coated to ensure proper distribution in the mix.
HTS FRAC Trial Project
HTS FRAC Trial Project
HTS FRAC Trial Project
HTS FRAC Lab Study
Evaluation of FORTA Fiber-Reinforced Asphalt Mixtures Using Advanced Material Characterization Tests – Evergreen Drive, Tempe, Arizona.
DYNAMIC COMPLEX MODULUS (E*) 7,000,000 40 F
100 F
130 F
6,000,000
Evergreen
5,132,366 4,027,411 4,000,000 2,981,436
1,200,000
3,000,000
100 F 2,000,000 1,000,000
294,000
803,000 466,000 1 lb/Ton
Boeing
800,000
209,000
0 Control
1,097,269
130 F
1,000,000
1,500,000 818,000
2 lb/Ton
E*, psi
E*, psi
5,000,000
747,179
600,000
479,964
400,000
200,000
148,180
133,365
242,350
0 Salt River 3/4" PG70-10
Salt River 3/4" PG64-22
Fiber-Reinforced
Repeated Load Permanent Deformation Test 0.0120 Control FEC02
0.0100
Axial Strain Slope
FEC03 0.0080
FEC04
1 lb/Ton
FE101 0.0060
FE102 FE104
0.0040
2 lb/Ton
FE202 FE203
0.0020
FE204
0.0000 0
5000
10000
15000
20000
Number of Cycles during the Tertiary Stage
25000
Indirect Tensile Strength Comparison IDT Comparison
Indirect Tensile Strength, N/mm2
4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -10
0
10
21.2
Temperature, °C
Control
1 lb/ton
2 lb/ton
37.8
Evergreen Drive Summary
• HTS FRAC exhibited 1.5 to 2 times higher dynamic modulus • Better resistance to fracture in HTS FRAC • Improved rutting resistance • Higher fatigue life compared to conventional mixes. • Better resistance to crack propagation
FHWA Testing
CRACKING CHARACTERIZATION OF ASPHALT MIXTURES WITH FIBER REINFORCEMENT USING CYCLIC FATIGUE AND DIRECT TENSION STRENGTH TESTS Federal Highway Administration for TRB August 1st, 2014
FHWA Testing
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona • Greater relaxation modulus • Higher dynamic modulus values than the control mixtures at high temperatures. • Crack length no fiber 123.2 ft VS Fiber side 11.6 ft. • FPMAC appears to be a good design option to resist freeze-thaw cycling impact. • The two year reviews and field visits also confirm the prediction and validate the viscoelastic and dynamic analyses of both mixes In general, the fiber-reinforced polymer-modified asphalt concrete has successfully demonstrated its ability to resist thermal cracking, freeze-thaw cycling, and rutting deformation through lab experiments and field observations.
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review on I-81
I-81 Project after three years of service life PennDOT distress evaluation
Route
I81
I81
Section
Fiber
Control
Segment
PCI
Rating
1830
91
Good
1840
94
Good
1850
95
Good
Mean
94
Good
1814
90
Good
1820
77
Satisfactory
1824
70
Satisfactory
Mean
79
Satisfactory
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review on SR 4016
SR 4016 Project after three years of service life PennDOT distress evaluation
Route
Section
Segment 184
SR4016
Fiber (Eastbound)
190 200
201 SR4016
No Fiber (Westbound)
191 185
Length (ft)
PCI
Rating
1044
81
Satisfactory
1556
74
Satisfactory
1605
62
Fair
Mean
71
Satisfactory
1620
48
Poor
1556
72
Satisfactory
1037
78
Satisfactory
Mean
64
Fair
HTS FRAC Trial Project
SR 3036 in Lancaster PA, Franklin Road The control had raveling and fatigue cracking after 4 years in service. This project was evaluated by Advanced Infrastructure Design
Field Performance – PCI Analysis
Pennsylvania State Route 3036 PCI after 4 years of service: HTS FRAC Section: 94 Control: 69 Estimated 5 year service life extension with HTS FRAC (PCI threshold of 55)
HTS FRAC Summary
High tensile strength aramid fibers No required changes to job mix formula Positive impact on field compaction Laboratory studies show improved resistance to rutting and cracking • Field data from in service projects confirming laboratory findings • • • •
HTS FRAC provides a cost effective solution to extend pavement service life
Questions?
A-PS-IN10.05.15
HTS FRAC Overview
High tensile strength aramid fibers No required changes to job mix formula Positive impact on field compaction Laboratory studies show improved resistance to rutting and cracking • Field data from in service projects confirming laboratory findings • • • •
HTS FRAC provides a cost effective solution to extend pavement service life
High Tensile Strength Fiber
Filler material characteristics Chemically Inert Non-Corrosive Non-Absorbent
Aramid High Tensile Strength Non-Corrosive High Temperature Resistance
Physical Characteristics of Aramid Materials
Aramid
Form
Monofilament Fiber
Specific Gravity
1.41 to 1.45
Tensile Strength
3000(Mpa) / 400,000psi
Length
19.05(mm) / ¾”
Natural Color
yellow
Acid/Alkali Resistance
inert
Decomposition Temperature (°F)
853
High Tensile Strength Fiber
19,400,000 aramid fibers at ¾” long (PER TON) converts to 229.6 miles or 1,212,288 linear feet of aramid fiber (PER TON) One cubic foot of pavement would contain 16.5 miles or 87,120 linear feet of aramid fiber
3D reinforcement in pavement
Mechanical not chemical
HTS FRAC
• No change to Job Mix formulas in most cases • Fiber does not need to be included in the mix design process
HTS FRAC Does not effect volumetrics
HTS FRAC
Does not negatively effect compaction, in some cases HTS helped to achieve compaction faster
HTS FRAC
States with FRAC specs
Georgia DOT Ohio DOT Pennsylvania DOT Fiber approved on QPLs for each state
Specifications
(g) Aramid Fibers. Use only aramid fibers listed in Bulletin 15 and approved for use in HMA, meeting the physical requirements of TABLE 1. Certify each shipment of aramid fibers according to Section 106.03(b). Add Aramid fibers at a rate of 2.0 to 2.5 ounces of Aramid fiber per ton of mix. Aramid fibers may be packaged in loose form with other inert material, or packaged in a bundled form coated with wax (or other inert material) to aid in dispersion of the aramid fibers into the mixture.
Ohio Specifications 826.02 Fibers. Use fibers specifically manufactured and drawn for use in asphalt concrete mixes. Use the specified fiber type conforming to the following requirements:
Furnish Type C fibers intended for use in asphalt concrete mixes. Ensure Type C fibers are blended with 3/4 inch (19 mm) fibrillated polyolefin fibers or wax coated to ensure proper distribution in the mix.
HTS FRAC Trial Project
HTS FRAC Trial Project
HTS FRAC Trial Project
HTS FRAC Lab Study
Evaluation of FORTA Fiber-Reinforced Asphalt Mixtures Using Advanced Material Characterization Tests – Evergreen Drive, Tempe, Arizona.
DYNAMIC COMPLEX MODULUS (E*) 7,000,000 40 F
100 F
130 F
6,000,000
Evergreen
5,132,366 4,027,411 4,000,000 2,981,436
1,200,000
3,000,000
100 F 2,000,000 1,000,000
294,000
803,000 466,000 1 lb/Ton
Boeing
800,000
209,000
0 Control
1,097,269
130 F
1,000,000
1,500,000 818,000
2 lb/Ton
E*, psi
E*, psi
5,000,000
747,179
600,000
479,964
400,000
200,000
148,180
133,365
242,350
0 Salt River 3/4" PG70-10
Salt River 3/4" PG64-22
Fiber-Reinforced
Repeated Load Permanent Deformation Test 0.0120 Control FEC02
0.0100
Axial Strain Slope
FEC03 0.0080
FEC04
1 lb/Ton
FE101 0.0060
FE102 FE104
0.0040
2 lb/Ton
FE202 FE203
0.0020
FE204
0.0000 0
5000
10000
15000
20000
Number of Cycles during the Tertiary Stage
25000
Indirect Tensile Strength Comparison IDT Comparison
Indirect Tensile Strength, N/mm2
4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -10
0
10
21.2
Temperature, °C
Control
1 lb/ton
2 lb/ton
37.8
Evergreen Drive Summary
• HTS FRAC exhibited 1.5 to 2 times higher dynamic modulus • Better resistance to fracture in HTS FRAC • Improved rutting resistance • Higher fatigue life compared to conventional mixes. • Better resistance to crack propagation
FHWA Testing
CRACKING CHARACTERIZATION OF ASPHALT MIXTURES WITH FIBER REINFORCEMENT USING CYCLIC FATIGUE AND DIRECT TENSION STRENGTH TESTS Federal Highway Administration for TRB August 1st, 2014
FHWA Testing
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review in Northern Arizona • Greater relaxation modulus • Higher dynamic modulus values than the control mixtures at high temperatures. • Crack length no fiber 123.2 ft VS Fiber side 11.6 ft. • FPMAC appears to be a good design option to resist freeze-thaw cycling impact. • The two year reviews and field visits also confirm the prediction and validate the viscoelastic and dynamic analyses of both mixes In general, the fiber-reinforced polymer-modified asphalt concrete has successfully demonstrated its ability to resist thermal cracking, freeze-thaw cycling, and rutting deformation through lab experiments and field observations.
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review on I-81
I-81 Project after three years of service life PennDOT distress evaluation
Route
I81
I81
Section
Fiber
Control
Segment
PCI
Rating
1830
91
Good
1840
94
Good
1850
95
Good
Mean
94
Good
1814
90
Good
1820
77
Satisfactory
1824
70
Satisfactory
Mean
79
Satisfactory
Performance of Fiber-Reinforced Polymer-Modified Asphalt: two year review on SR 4016
SR 4016 Project after three years of service life PennDOT distress evaluation
Route
Section
Segment 184
SR4016
Fiber (Eastbound)
190 200
201 SR4016
No Fiber (Westbound)
191 185
Length (ft)
PCI
Rating
1044
81
Satisfactory
1556
74
Satisfactory
1605
62
Fair
Mean
71
Satisfactory
1620
48
Poor
1556
72
Satisfactory
1037
78
Satisfactory
Mean
64
Fair
HTS FRAC Trial Project
SR 3036 in Lancaster PA, Franklin Road The control had raveling and fatigue cracking after 4 years in service. This project was evaluated by Advanced Infrastructure Design
Field Performance – PCI Analysis
Pennsylvania State Route 3036 PCI after 4 years of service: HTS FRAC Section: 94 Control: 69 Estimated 5 year service life extension with HTS FRAC (PCI threshold of 55)
HTS FRAC Summary
High tensile strength aramid fibers No required changes to job mix formula Positive impact on field compaction Laboratory studies show improved resistance to rutting and cracking • Field data from in service projects confirming laboratory findings • • • •
HTS FRAC provides a cost effective solution to extend pavement service life
Questions?
