UDOT Pavement Preservation Overview...UDOT Micro-Surfacing Project Example #2 I-80, mp 128.7 to...
Transcript of UDOT Pavement Preservation Overview...UDOT Micro-Surfacing Project Example #2 I-80, mp 128.7 to...
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UDOT Pavement Preservation Overview /
Howard J. Anderson, P.E.State Asphalt Engineer
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Utah State Roads Miles(Centerline)
• Interstate 940• NHS 1,720• Level 1 1,340• Level 2 1,870• Total 5,870
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Utah State Roads Surface • Interstate 7,280• NHS 7,820• Level 1 4,150• Level 2 4,510• Total 23,760
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Utah State Road Surfaces
concreteconcrete
concreteconcrete
SMA
Chip Seal
MicroOGSC
BWC
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Approximate Cost(UDOT PDBS last 12 months)
• Chip Seal $2.00 / sy• SMA $93.00 / ton ($7.5 / sy)• Micro $2.15 / sy• OGSC $73.50 / ton ( $3.7 / sy)• BWC $4.65 / sy• HMLO $71.00 / ton (5.0 / sy)• Slurry $1.90 / sy
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Chip Seal Surface Areas(by Road Category and Age)
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SMA Surface Areas(by Road Category and Age)
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Micro Surface Areas(by Road Category and Age)
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OGSC Surface Areas(by Road Category and Age)
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UDOT Micro-Surfacing
Standard Specification 02735Approved Supplier QMP 508 Asphalt Emulsion
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Modified Emulsion Residue by Distillation
• Binder Grade: CQS-1HP• Application Rate: > 25 lb / sy, residual
asphalt binder 7% min by DWA • Penetration @ 25°C of 40-90• Softening Point 57°C min• Residue by distillation 62% min
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Modified Emulsion Residue by Evaporation
• Original DSR, G* at 58°C, 7 – 14 kPa• Original DSR, G* at 64°C, 4-8 kPa• Original DSR, Phase Angle @58°C 75
max• MSCR at 64°C % recovery at 3.2 kPa, 25
min
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Mineral Aggregates• 100 % Crushed mineral aggregates• Sand Equivalent 60 min• LA Abrasion 30% max• Sodium sulfate soundness 15% max• Minimum Polish Value of 31• Clay lumps and friable particles 2%
max• Mineral filler, cement or hydrated lime,
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Job-Mix Gradation Design • 3/8 inch 100 • # 4 70-90 • #8 45-70 • #16 28-50 • #30 19-34 • #50 12-25 • #100 7-18 • #200 5-15
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Mix Design• Binder Grade: CQS-1HP, 3% polymer
requirement• Formulate polymer modified emulsified
asphalt to allow traffic on it in 1 hour (humidity not more than 50%, temperature at least 75°F)
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Wyoming DOT I-80, photo from Rusty Price ISS
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Wyoming DOT I-80, photo from Rusty Price ISS
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Wyoming DOT I-80, photo from Rusty Price ISS
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UDOT Micro-SurfacingProject Example #1
I-80, mp 80 to 94.4Project F-180-2(58)80Original bid amount: $1,620,470.Micro-Surfacing quantity: 734,449 sq. yd.Cost: $1.75 per sq. yd.
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Region 2
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Region 2
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UDOT Micro-SurfacingProject Example #2
I-80, mp 128.7 to 137.0Project F-180-3(157)130Bituminous Pavement RehabilitationRotomilling 654,530 sy of OGSC51,025 AADTMicro-Surfacing quantity: 1,211,553 sy, (two layers)Completed in 50 working days, 2008
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Photo from Rusty Price ISS
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Photo from Rusty Price ISS
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Photo from Rusty Price ISS
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Photo from Rusty Price ISS
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Photo from Rusty Price ISS
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Questions?
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