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Cost effective prevention of reflective cracking of composite pavement.
  • Published Date:
    2011-09-01
  • Language:
    English
Filetype[PDF-2.51 MB]


Details:
  • Publication/ Report Number:
    FHWA/LA.11/478
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    755780841
  • Edition:
    Final report; 2008-2010.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ;
  • Format:
  • Abstract:
    Louisiana experimented with various techniques and treatments to control reflective cracking since the

    1970s. The objective of this study is to evaluate and compare different reflective cracking control

    treatments by evaluating the performance, constructability, and cost-effectiveness of pavements built

    with these treatments across the state. To achieve this objective, a survey of current state practices

    identified the treatment methods that are used or that had been used to delay and mitigate reflective

    cracking in composite pavements. Based on this survey and a thorough review of LADOTD databases,

    pavement sections built with reflective crack control treatment methods were identified. Projects with

    sufficient years in service and with available untreated segments were selected for detailed

    performance and economic evaluation. In total, the performance of 50 different sites that were

    constructed with various treatments was evaluated for a period ranging from 4 to 18 years. Among

    various treatments that were analyzed, saw and seal, and chip seal as a crack relief interlayer showed

    the most promising results in terms of performance and economic worthiness. The cost effectiveness

    of fiber-glass grid was not validated as compared to regular HMA overlays. Stress absorbing

    membrane interlayer and high strain asphalt crack relief interlayer (STRATA®) showed mixed results

    in terms of performance. In addition, there were an insufficient number of projects for paving fabrics

    to allow for drawing conclusions on the cost-effectiveness of this treatment method.

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