udot pavement preservation overview...udot micro-surfacing project example #2 i-80, mp 128.7 to...

UDOT Pavement Preservation Overview /

Howard J. Anderson, P.E.State Asphalt Engineer

Wednesday, March 5, 14

Utah State Roads Miles(Centerline)

• Interstate 940• NHS 1,720• Level 1 1,340• Level 2 1,870• Total 5,870


Utah State Roads Surface • Interstate 7,280• NHS 7,820• Level 1 4,150• Level 2 4,510• Total 23,760


Utah State Road Surfaces

concreteconcrete

concreteconcrete

SMA

Chip Seal

MicroOGSC

BWC


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


Chip Seal Surface Areas(by Road Category and Age)


SMA Surface Areas(by Road Category and Age)


Micro Surface Areas(by Road Category and Age)


OGSC Surface Areas(by Road Category and Age)


UDOT Micro-Surfacing

Standard Specification 02735Approved Supplier QMP 508 Asphalt Emulsion


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


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


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,


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


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)


Wyoming DOT I-80, photo from Rusty Price ISS


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.


Region 2


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


Photo from Rusty Price ISS


Questions?


udot pavement preservation overview...udot micro-surfacing project example #2 i-80, mp 128.7 to...

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