louisiana transportation conference issues... · lab tests for rutting and moisture damage...
TRANSCRIPT
![Page 1: Louisiana Transportation Conference Issues... · Lab tests for rutting and moisture damage potential for ... BituTech PER Mix Type: ... (Marshall Mix Design)](https://reader035.vdocuments.site/reader035/viewer/2022062600/5af2cad97f8b9ac57a91a510/html5/thumbnails/1.jpg)
Louisiana Transportation Conference Baton Rouge, LA
Feb. 18, 2013
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Lab Tests on WMA Nearly all WMA produced to date used an HMA mix design
Lower mix temperatures cause less asphalt adsorption for most aggregates, which can change volumetric properties.
Lab tests for rutting and moisture damage potential for WMA commonly yield less favorable results compared to HMA
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Location Route WMA Technologies Date Const.
St. Louis, MO Hall Street Evotherm ET, Sasobit, Aspha-min May-2006
Iron Mtn., MI M95 Sasobit Sep-2006
Silverthorne, CO I-70 Advera, Sasobit, Evotherm DAT Aug-2007
Franklin, TN SR45 Astec DBG, Advera, Evotherm DAT, Sasobit Oct-2007
Graham, TX US 380 Astec DBG Jun-2008
George, WA I-90 Sasobit Jun-2008
Walla Walla, WA US-12 Maxam Aquablack Apr-2010
Centreville, VA I-66 Astec DBG Jun-2010
Rapid River, MI CR-513 Evotherm 3G, and Advera Jun-2010
Baker, MT Route 322 Evotherm DAT Aug-2010
Munster, IN Calumet Ave. Evotherm, Gencor foam, Heritage wax Sep-2010
Jeff. Co., FL SR 30 Terex foaming system Oct-2010
Queens, NY Little Neck Pkwy Cecabase, SonneWarmix, BituTech PER Oct-2010
Case Grande, AZ SR 84 Sasobit Dec-2011
NCHRP 9-47A Projects
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Production Temperatures, 9-47A Projects
200
220
240
260
280
300
320
340
360
380
Pro
du
ctio
n T
em
per
atu
re (
F)
WMA HMA
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Field Performance Evaluation Procedure
Three 200-foot analysis sections per mix section
Three 6” dia. cores from outside the wheelpaths, and four 6” dia. cores from the wheelpaths
Cores used to determine the in-place density, indirect tensile strengths, specific gravity, gradation, asphalt content, and the true binder grade for each mix.
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Field Performance
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Existing Projects
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Hall Street, St. Louis
Constructed May 2006
WMA Techn.: Sasobit, Evotherm ET, Aspha-min
Overlay of old concrete pavement in industrial area
Mix Type: 12.5mm NMAS
Binder Type: PG70-22
Ndesign = 100gyrations
Climate: Wet- Freeze
HMA over crack sealant
WMA over crack sealant
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Hall Street, St. Louis, MO Revisit Oct 2011 (5 years 5 months)
HMA Sasobit Evotherm ET Aspha min
Rutting (mm) 1.9 0.8 2.4 2.4 Total Length of
Cracks (ft.) 628 1092 835 1310
Density (%Gmm) 96.1 94.8 97.4 96.8
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M95 Iron Mountain, MI
Constructed Sept. 2006
WMA Tech.: Sasobit
Mix type: 9.5 mm NMAS
Ndesign = 86 gyrations
Binder Grade: PG 58-34
Climate: Wet- freeze
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M95 Iron Mountain, MI Revisit June 2011 (4 years 9 months)
HMA Sasobit
Rut Depth (mm) 1.4 0
Total Length of Cracks (ft.)
3 46
Density (%Gmm) 97.3 95.7
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Silverthorne, Co Constructed August 2007
WMA Tech.: Advera, Sasobit, Evotherm DAT
Mix type: 9.5 mm NMAS
Overlay of thermal cracked asphalt pavement
Climate: Dry Freeze
Binder Grade: PG 58-28
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Silverthorne, Co Revisit Oct 2010 (3 years 2 months)
HMA Advera Sasobit Evotherm
DAT
Rut Depth (mm) 6 4 6 6
Total Length of Cracks (ft.) 11 1 3 3
Density (%Gmm) 96.7 97.8 97.1 97.1
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Franklin, TN
Constructed Oct. 2007
WMA Technologies: Evotherm DAT, Advera, Sasobit, Astec Double Barrel Green
Mix type: Marshall 12.5 mm NMAS
Climate: Wet, No Freeze
Binder Type: PG 70-22
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Franklin, TN Revisit March 2011 (3 years 5 months)
HMA Advera Astec DBG
Evotherm DAT
Sasobit
Rut Depth (mm) 0 0.5 0.4 0 0
Total Length of Cracks (ft.)
30 105 58 4 314
Density (%Gmm) 92.8 88.6 88.2 89.9 86.8
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Graham, TX
Constructed June 2008
WMA Tech.: Astec DBG
Mix Type: 9.5 mm NMAS
Binder Type: PG 64-22
Climate: Dry-no freeze
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Graham, TX Revisit Dec 2010 (2 year 6 months)
HMA
Astec DBG
Rutting (mm) 0 0
Total Length of Cracks (ft.) 58.0 81.5
Density (%Gmm) 97.0 94.2
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New Projects
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Walla Walla, WA, 1 and 2 years Revisits WMA Technology: Maxam Aquablack
Mix Type: 12.5 mm NMAS
Ndesign = 100 gyrations
Binder Grade: PG 64-28
Climate: Dry -Freeze
No cracking
HMA Maxam Aquablack
Density at Constr. (%Gmm)
94.7 94.4
Density At Revisits (%Gmm)
Revisit 1 Revisit 2 Revisit 1 Revisit 2
95.9 96.3 95.2 95.7
Rut Depth (mm) 1 5 0 0
Cracking (ft/600) 0 0 0 0
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Centreville, VA, 1 and 2 Years Revisits
No cracking
WMA Tech.: Astec DBG
Mix Type: 12.5 mm NMAS
Binder Type: PG 76-22
Ndesign = 65 gyrations
Climate: Wet- freeze
HMA Astec DBG
Density at Constr. (%Gmm)
89.1 89.9
Density At Revisits (%Gmm)
Revisit 1 Revisit 2 Revisit 1 Revisit 2
94.4 93.8 93.5 93.4
Rut Depth (mm) 0 3 0 3
Cracking (ft/600) 0 0 0 0
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Rapid River, MI, 1and 2 Years Revisits
WMA Tech: Advera and Evotherm 3G
Mix Type: 12.5 mm NMAS
Binder Type: PG 52-34
Climate: Wet-Freeze No rutting
HMA Advera Evotherm
Density at Constr. (%Gmm) 94.1 95 94.3
Density At Revisits (%Gmm) Revisit 1 Revisit 2 Revisit 1 Revisit 2 Revisit 1 Revisit 2
97.6 96.6 96.5 97 96.9 96
Rut Depth (mm) 0 0 0 0 0 0
Cracking (ft/600) 0 0.5 0.5 0.5 2 2
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Baker, MT, 1 and 2 Years Revisits WMA Tech.: Evotherm DAT
Mix Type: 12.5 mm NMAS
Binder Type: PG 64-28
Ndesign = 75 gyrations
Climate: Dry-Freeze
HMA Evotherm
Density at Constr. (%Gmm)
91.3 91.2
Density At Revisits (%Gmm)
Revisit 1 Revisit 2 Revisit 1 Revisit 2
93.6 94 93.7 93.3
Rut Depth (mm) <1 <1 <1 <1
Cracking (ft/600) 0 12 0 24
Low Severity cracking
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Munster, IN, 1 and 2 Years Revisits
No rutting
Mix Type: 9.5 mm NMAS
Binder Type: PG 64-22
Ndesign = 75 gyrations
Climate: Wet-Freeze
WMA Tech.: Evotherm, Gencor foam,
Heritage wax
HMA Evotherm Gencor Foam Heritage Wax
Density at Constr. (%Gmm)
88.7 90.3 90.4 88.7
Density At Revisits (%Gmm)
Revisit 1 Revisit 2 Revisit 1 Revisit 2 Revisit 1 Revisit 2 Revisit 1 Revisit 2
92.9 93.5 93.0 93.3 94.0 93.5 92.9 93.2
Rut Depth (mm) 0 0 0 0 0 0 0 0
Cracking (ft/600) 1 14 0 0 14 97 0 0
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Jefferson Co, FL, 1 and 2 Years Revisits
No Cracking
Mix Type: 9.5 mm NMAS
Binder Type: PG 76-22
Ndesign = 75 gyrations
Climate: Wet-No Freeze
WMA Tech.: Terex foaming system
HMA Terex Foam
Density at Constr. (%Gmm)
93 92.1
Density At Revisits (%Gmm)
Revisit 1 Revisit 2 Revisit 1 Revisit 2
92.6 91.5 91.8 91.8
Rut Depth (mm) 2 2 3 3
Cracking (ft/600) 0 0 0 0
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Queens, NY, 1 year, Jan. 2012
HMA BituTech
PER Cecabase
Sonne Warmix
Rut Depth (mm) 1.0 <1 <0.5 0
Density at Constr. (%Gmm) 90.8 92.4 92.1 89.9
Density At Revisit (%Gmm) 94.7 95.1 93.8 95.7
No Cracking
WMA Tech.: Cecabase, Sonneborn,
BituTech PER
Mix Type: 9.5 mm NMAS
Binder Type: PG 64-22
Ndesign = 75 gyrations
Climate: Wet- Freeze
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Casa Grande, AZ, 1 Year Revisit
Mix Type: 19 mm NMAS
Binder Type: PG 70-10
75 blows (Marshall Mix Design)
Climate: Dry- Freeze
WMA Tech.: Sasobit
HMA Sasobit
Density at Constr. (%Gmm) 90.6 92.4
Density At Revisit (%Gmm) 93.8 94.5
Rut Depth (mm) 3 3
Cracking (ft/600) 0 0
Sections topped with chip seal
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Summary of NCHRP 9-47A Projects 14 projects thoroughly evaluated
Age: up to 6 years old
WMA using HMA mix designs
Traffic ranges: low to very heavy
Climates: hot to very cold
Performance: Very good overall
Franklin, TN
Munster, IN
Silverthorne, CO
Baker, MT
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In place densities (=)
Core tensile strengths (=)
TSR (= or↓)
Hamburg SIP (= or ↓)
FN (↓)
E* (= or ↓)
Fatigue tests (= or ↑)
Engineering Properties
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High PG, Construction Cores
0
10
20
30
40
50
60
70
80
90
100M
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Aq
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Ast
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Evo
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WA VA MI MT IN FL NY AZ
Hig
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G G
rad
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HMA WMA
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Temperature Difference- High PG (WMA-HMA) Construction Cores
-2.6
1.2
-0.9
0.7
-0.1
-2.7
-4.2
-2.1 -2.1
-5.7
-4.5 -5.3
-2
-10
-8
-6
-4
-2
0
2
4
6
Max
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Ast
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m 3
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m 3
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WA VA MI MT IN FL NY AZ
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Temperature Difference- High PG (WMA-HMA) 1 Year Cores
1
-8.6
-1.5
3
-1.1 -1.1
-2.3 -2.1 -3
0.6 0.1
0.5
4.2
-10
-8
-6
-4
-2
0
2
4
6
Max
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Ast
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Evo
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m 3
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Evo
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WA VA MI MT IN FL NY AZ
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Temperature Difference- High PG (WMA-HMA) 2 Years Cores
2.1
1.1
-3.7
-1.6
-3.9 -3.5
-1.3
1.9
-6.6
0.9 0.3
4.4
-10
-8
-6
-4
-2
0
2
4
6
Max
am A
qu
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Ast
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Evo
the
rm 3
G
Ad
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Evo
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rm D
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Evo
the
rm 3
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WA VA MI MT IN FL NY
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True Binder Low PG (Construction Cores)
-40
-35
-30
-25
-20
-15
-10
-5
0
Max
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Ast
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WA VA MI MT IN FL NY AZ
Low
PG
Gra
de
HMA WMA
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Temperature Difference- Low PG (WMA-HMA) Construction Cores
-1.9 -1.8
0.4 0
0.4
-2.2 -1.8
0.6 0.6
-4.8
-3.3 -3.5
0.6
-6
-4
-2
0
2
4
6
Max
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Ast
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WA VA MI MT IN FL NY AZ
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Temperature Difference- Low PG (WMA-HMA) 1 Year Cores
-0.1
-4.2
0.7
1.9
-2.3
1.2
-1.3
1.1
-1.4 -2 -1.8
-3.4
-1
-6
-4
-2
0
2
4
6
Max
am A
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Ast
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Evo
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m 3
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Evo
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m 3
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Gen
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Ult
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WA VA MI MT IN FL NY AZ
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Temperature Difference- Low PG (WMA-HMA) 2 Years Cores
1.8 2.1
0 0
1.2
-0.7 -0.4
4.4
-5.7
-0.6 -1.3
1
-6
-4
-2
0
2
4
6
Max
am A
qu
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Ast
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Evo
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m 3
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38
Tensile Strength 2 Year Cores
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