warranted hot mix asphalt pavements history and overview l.
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WARRANTED HOT MIX ASPHALT PAVEMENTS: History and Overview. IN THE BEGINNING. First US HMA (1870’s). HISTORY. 1890’s to 1920’s HMA patented 10 or 15 year warranty material and workmanship. Warren Brothers Warranty Seal. HISTORY. 1920’s patent protection lost warranties discontinued

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Presentation Transcript
in the beginning
IN THE BEGINNING
  • First US HMA (1870’s)
history
HISTORY
  • 1890’s to 1920’s
    • HMA patented
    • 10 or 15 year warranty
    • material and workmanship
history8
HISTORY
  • 1920’s
    • patent protection lost
    • warranties discontinued
  • 1950’s
    • federal participation
    • state responsible for maintenance
    • warranties not allowed
history9
HISTORY
  • 1990
    • European Asphalt Study Tour
    • FHWA Special Experimental Project 14
    • innovative contracting methods (includes warranties)
history10
HISTORY
  • 1993
    • first pavement warranty project
  • 1995
    • three warranty projects
  • 1996
    • seven warranty projects
  • 1997
    • more than 20 warranty projects
transportation research board
TRANSPORTATION RESEARCH BOARD
  • 1992
    • committee formed
  • 1994
    • workshop held
    • “Development of Pavement PerformanceMeasures in the contract Equation”
trb workshop outcome
TRB WORKSHOP OUTCOME

Two methods for specifying performance

  • predict performance (lab tests)
  • measure performance (warranty)
warranty types
Warranty Types
  • Materials and Workmanship
  • Performance
materials and workmanship warranty
Materials and Workmanship Warranty
  • Follow state specifications
  • Define unacceptable performance
  • If problem, forensic to determine if specifications were met
performance warranty
Performance Warranty
  • Contractor sets specifications
  • Define unacceptable performance
  • If problem, contractor responsible for repair
warranty specification details
Warranty Specification Details
  • Acceptance Criteria
  • Performance criteria
  • Size of elements
  • Pavement evaluation
  • Dispute resolution
warranty acceptance criteria
Warranty Acceptance Criteria
  • Quality control plan
  • Certification of project
warranty performance criteria
Warranty Performance Criteria
  • Engineering Properties
    • rutting
    • cracking
    • raveling
warranty performance criteria19
Warranty Performance Criteria
  • User Properties
    • smoothness
    • safety (hydroplaning in ruts)
    • safety (friction number)
warranty element size
Warranty Element Size
  • Entire Project
  • Mile
  • Tenths of mile
warranty pavement evaluation
Warranty Pavement Evaluation
  • How often?
  • By who?
  • Sample rate?
  • Flow of information?
warranty dispute resolution
Warranty Dispute Resolution
  • Pre-define method to resolve dispute
  • Parties agree before hand on method of resolution
benefits
BENEFITS
  • definition of success
  • balanced risk
  • innovation rewarded
  • non-confrontational construction
  • improved quality
close
Close
  • Warranties used in the past
  • use discontinued from 1920’s to 1990’s
  • reintroduced based on European experience
  • focus on customer satisfaction