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Assessing the environmental impacts of work zones in arterial improvement projects.
  • Published Date:
    2014-12-01
  • Language:
    English
Filetype[PDF-2.16 MB]


Details:
  • Creators:
  • Publication/ Report Number:
    KLK900-SB-004
  • Resource Type:
  • Geographical Coverage:
  • Corporate Publisher:
  • Format:
  • Abstract:
    Preservation treatments help in extending the remaining service lives of pavements, but at the same time, they

    may have substantial environmental impacts due to the acquisition of raw materials, transportation of the extracted

    materials, manufacturing of the final product, and the use of various equipment during the treatment process.

    Traditional and accelerated maintenance, repair and rehabilitation (MRR) techniques were identified for both

    flexible and rigid pavements. Environmental impacts of the commonly used MRR strategies were calculated. A

    life cycle assessment (LCA) approach was used, taking into account the life extension of the pavement for each

    type of strategy. The scope boundary included only the construction activities relevant to pavement MRR. LCA

    results showed that for flexible pavements, accelerated rehabilitation techniques like partial or full depth

    reclamation have less life cycle environmental impacts than traditional techniques like milling and overlay or total

    reconstruction. For rigid pavements, all the rehabilitation techniques are comparatively new. The environmental

    impacts were found to be similar for both traditional techniques like concrete full depth repair and accelerated

    techniques like precast concrete pavement systems. Minor treatment processes for both flexible and rigid

    pavements like fog seal, crack seal, concrete seal joints, diamond grinding, and concrete partial depth repair have

    minimum impacts with maximum benefits when the corresponding life extensions are compared. The results

    obtained can assist highway construction management professionals to select environmentally sustainable MRR

    solutions.

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