WARRANTED HOT MIX ASPHALT PAVEMENTS: Development, Benefits and Risks.
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WARRANTED HOT MIXASPHALT PAVEMENTS:
Development,Benefits and Risks
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What Warranties Are Not
• Guarantee of defect free pavement
• Throwing away the spec book
• A way to get rid of DOT employees
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What Warranties Are
• Guarantee of good performance
• Incentive for quality construction
• Incentive for innovation
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Incentive for Good Performance
• Current Specifications written to push the contractor towards “good performance”
• Warranty Specifications define what good performance is
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“The Contract Specifications Were Met”
Definition of Success
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BENEFIT OF WARRANTY
• Success = Performance
• Non-Confrontational Construction
• Innovation Rewarded
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Assigning Risk
• “Who has control of an item?”• Contractor?
then contractor assumes risk of poor performance.
• Agency?then agency maintains risk of poor performance.
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DOT Responsibilities
Structure
Quantities
Time Unit Cost
Condition Survey
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Contractor Responsibilities
Materials
Mix Design
Process Control
Remediation Plans
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Industry Benefits
• Liability
• “Raises the bar”
• Improves competition with pcc
• Builder sets own specs
• No approvals required
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Agency Benefits
• People loss
• Improves probability of good performance
• Less confrontation
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Friction
0
10
20
30
40
50
60
Ave
rage
Fri
ctio
n N
umbe
r
1996 1997 1998 1999 2000
EBWB
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FN = 24
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0
10
20
30
40
50
60
70
0.00 0.20 0.40 0.60Macrotexture Depth, mm
Fri
cti
on
Nu
mb
er
Correlation of Friction Number to Macro-texture Depth
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HURDLES
PEOPLE#1 is
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HURDLES
• Agency– “What I want is a guarantee of
performance – “. . . And by the way, I want to keep the
specifications we have because they are a good set of specs. We have tuned them to cover all situations.
– “. . . besides, I need a hammer to control poor (out-of-state) contractors.”
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HURDLES
• Contractor– “What I want is for the agency to get
out of my hair
– “. . . don’t shut me down
– “. . . and I want to get paid for every ton I put down.”
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WHAT’S IN IT
• For the Agency– Performance
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WHAT’S IN IT
• For the Contractor– Freedom in exchange for
performance
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BENEFITS
• Success = Performance
• Risk Balanced
• Innovation Rewarded
• Non-Confrontational Construction
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SHORT TERM
• 3 to 5 years• Focuses attention on
manufacturing and placement details
• Minimal opportunity for innovation
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LONG TERM
• Shifts focus from construction
• Innovative materials
• Maintenance techniques
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WARRANTIES
• Improve performance
• Require change
Worth it?
You Decide
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SURE LOOKS GOOD TO ME!