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Optimization and management of materials in earthwork construction : final report, April 2010.
  • Published Date:
    2010-04-01
  • Language:
    English
Filetype[PDF-2.39 MB]


Details:
  • Publication/ Report Number:
    IHRB Project TR-501 ; InTrans Project 04-162 ;
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    630120144
  • Edition:
    Final report; April 2010.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Soils and GeologyNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ;
  • Format:
  • Abstract:
    As a result of forensic investigations of problems across Iowa, a research study was developed aimed at providing solutions to identified

    problems through better management and optimization of the available pavement geotechnical materials and through ground

    improvement, soil reinforcement, and other soil treatment techniques. The overall goal was worked out through simple laboratory

    experiments, such as particle size analysis, plasticity tests, compaction tests, permeability tests, and strength tests. A review of the

    problems suggested three areas of study: pavement cracking due to improper management of pavement geotechnical materials,

    permeability of mixed-subgrade soils, and settlement of soil above the pipe due to improper compaction of the backfill. This resulted in

    the following three areas of study:

    • The optimization and management of earthwork materials through general soil mixing of various select and unsuitable soils

    and a specific example of optimization of materials in earthwork construction by soil mixing

    • An investigation of the saturated permeability of compacted glacial till in relation to validation and prediction with the

    Enhanced Integrated Climatic Model (EICM)

    • A field investigation and numerical modeling of culvert settlement

    For each area of study, a literature review was conducted, research data were collected and analyzed, and important findings and

    conclusions were drawn. It was found that optimum mixtures of select and unsuitable soils can be defined that allow the use of

    unsuitable materials in embankment and subgrade locations. An improved model of saturated hydraulic conductivity was proposed for

    use with glacial soils from Iowa. The use of proper trench backfill compaction or the use of flowable mortar will reduce the potential

    for developing a bump above culverts.

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