Interstate Rubblization: Past & Future
Transcript of Interstate Rubblization: Past & Future
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Interstate Rubblization:Past & Future
Rex VinesDeputy Director & Chief Engineer
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ARDOT Quick Facts
• 3rd largest State agency
• Approximately 3,700 employees
• Maintain 16,418 miles of highway and 7,335 bridges
• Central Offices in Little Rock
• 10 Districts Statewide
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Background• Majority of Interstates built
more than 60 years ago• Over 60% of Interstates
in “Poor” condition• 6th worst in the country• Patching not enough –
Replacement needed
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Background• Highway improvements traditionally
funded on a “pay-as-you-go” basis• Interstates carry 25-60% trucks• “GARVEE” financing
(Grant Anticipation Revenue Vehicle)• Interstate Rehabilitation Program• Majority asphalt reconstruction• Some concrete reconstruction
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What is Rubblization?
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Asphalt Design• 4” ACHM Surface Course (1/2”)• 3” ACHM Binder Course (1”)• 4” ACHM Base Course• 9” Rubblized PCCP
Asphalt Reconstruction• Existing PCCP broken• Drainage Installed• ACHM Overlay
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Resonant Breaker• Resonant Machines Inc. (RMI),
Tulsa, OK• Steel Beam• Pedestal and shoe• Low Amplitude, High Frequency• Breaks PCCP into 6” pieces
and smaller
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Multi-Head Breaker • Antigo Construction, Antigo, WI• Badger State Highway Equipment• 16 Steel Hammers• Various Drop Heights• Hammer cycles @ 30 drops/min
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Rubblized Pavement
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Underdrain
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Interior Lane Overlay, 10’ Shoulder
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Full Depth at Bridge End
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Full Depth at Underpass
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Crossover
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Centerline Median Barrier
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PICTURE
4:1 Slopes
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Completed Surface
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Rumble Strips
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199950 Projects | 360 Total Miles | $1 BillionCondition Improved from 21% ‘Good’ to 72%
2011Passed with 81% of Vote75 +/- Projects | 450+ Total Miles | $1.2 BillionFirst Contracts Awarded in November 2012
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• Mill and Inlay• Mill and Overlay• Rubblize and Overlay• Mill, Rubblize and Overlay• Concrete Pavement Rehabilitation• Concrete Reconstruction• Interchanges Modifications
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Scheduled
Under Construction
Completed
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Interstate Condition
76%
67%
72%
21%
24%
23%
14%
16%
10%
14%
63%
2020 WITH BONDS
2014
2006 POST-IRP
1999 PRE-IRP
Good Fair Poor
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Original Arkansas Interstate Pavement Sections
ORIGINAL INTERSTATE SYSTEM
• 542.1 Miles• 100% Concrete Construction
– Jointed Concrete Pavement– Continuously Reinforced Concrete Pavement
• Average Pavement Age was 35+ Years– Built in 1967
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PRE-1999 IRP INTERSTATE SYSTEM
• 655 Total Miles• 72.7% Concrete, 474.6 Miles• 27.3% HMA, 180.8 Miles
POST-1999 IRP INTERSTATE SYSTEM
• 655 Total Miles• 33.3% Concrete, 220.7 Miles• 66.7% HMA, 434.7 Miles
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