WARRANTED HOT MIX ASPHALT PAVEMENTS: History and Overview - PowerPoint PPT Presentation

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WARRANTED HOT MIX ASPHALT PAVEMENTS: History and Overview

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... Warranty Element Size Entire Project Mile Tenths of mile Warranty Pavement Evaluation How often? By who? Sample rate? Flow of information? – PowerPoint PPT presentation

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Title: WARRANTED HOT MIX ASPHALT PAVEMENTS: History and Overview


1
WARRANTED HOT MIXASPHALT PAVEMENTSHistory
and Overview
2
IN THE BEGINNING
  • First US HMA (1870s)

3
HISTORY
  • 1890s to 1920s
  • HMA patented
  • 10 or 15 year warranty
  • material and workmanship

4
Warren Brothers Warranty Seal
5
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8
HISTORY
  • 1920s
  • patent protection lost
  • warranties discontinued
  • 1950s
  • federal participation
  • state responsible for maintenance
  • warranties not allowed

9
HISTORY
  • 1990
  • European Asphalt Study Tour
  • FHWA Special Experimental Project 14
  • innovative contracting methods (includes
    warranties)

10
HISTORY
  • 1993
  • first pavement warranty project
  • 1995
  • three warranty projects
  • 1996
  • seven warranty projects
  • 1997
  • more than 20 warranty projects

11
TRANSPORTATION RESEARCH BOARD
  • 1992
  • committee formed
  • 1994
  • workshop held
  • Development of Pavement PerformanceMeasures in
    the contract Equation

12
TRB WORKSHOP OUTCOME
  • Two methods for specifying performance
  • predict performance (lab tests)
  • measure performance (warranty)

13
Warranty Types
  • Materials and Workmanship
  • Performance

14
Materials and Workmanship Warranty
  • Follow state specifications
  • Define unacceptable performance
  • If problem, forensic to determine if
    specifications were met

15
Performance Warranty
  • Contractor sets specifications
  • Define unacceptable performance
  • If problem, contractor responsible for repair

16
Warranty Specification Details
  • Acceptance Criteria
  • Performance criteria
  • Size of elements
  • Pavement evaluation
  • Dispute resolution

17
Warranty Acceptance Criteria
  • Quality control plan
  • Certification of project

18
Warranty Performance Criteria
  • Engineering Properties
  • rutting
  • cracking
  • raveling

19
Warranty Performance Criteria
  • User Properties
  • smoothness
  • safety (hydroplaning in ruts)
  • safety (friction number)

20
Warranty Element Size
  • Entire Project
  • Mile
  • Tenths of mile

21
Warranty Pavement Evaluation
  • How often?
  • By who?
  • Sample rate?
  • Flow of information?

22
Warranty Dispute Resolution
  • Pre-define method to resolve dispute
  • Parties agree before hand on method of resolution

23
BENEFITS
  • definition of success
  • balanced risk
  • innovation rewarded
  • non-confrontational construction
  • improved quality

24
Close
  • Warranties used in the past
  • use discontinued from 1920s to 1990s
  • reintroduced based on European experience
  • focus on customer satisfaction

25
THE END
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