KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Dissertations and Theses
    • Dissertations
    • View Item
    •   KU ScholarWorks
    • Dissertations and Theses
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Evaluation and Design of Wicking Geotextile for Pavement Applications

    Thumbnail
    View/Open
    Available after: 2019-12-31 (6.127Mb)
    Issue Date
    2017-12-31
    Author
    Guo, Jun
    Publisher
    University of Kansas
    Format
    239 pages
    Type
    Dissertation
    Degree Level
    Ph.D.
    Discipline
    Civil, Environmental & Architectural Engineering
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    Geotextiles are often included in roadway structures as substituting drainage layers for gravel or sand drainage layers. When water infiltrates through pavements and enters base courses, it increases water content of base courses with fines, which leads to a decrease in base resilient modulus and accelerated development of deformation and eventually shortens the pavement structure service life. A geotextile allows free water to flow in the geotextile in its plane direction more easily than through its surrounding geomaterial. Thus, the geotextile placed at the interface between the base course and the subgrade shortens the drainage path and accelerates the drainage rate in a pavement structure. However, conventional geotextiles can only provide drainage for free water (i.e., water that flows under action of gravity). In unsaturated soils, suction (also called capillary force) between soil particles hold water and conventional geotextiles cannot provide drainage to capillary water within base courses. A new type of geotextile, wicking geotextile, was recently developed to remove water from soil via capillary action or suction. This wicking geotextile includes special deep-groove fibers in the cross-machine direction of the geotextile. The hydrophilic and hygroscopic deep-groove fibers can induce high capillary force to “wick” water out from unsaturated soil. Few case studies have shown the wicking geotextile could maintain or reduce the water content of the base course after compaction. However, the effectiveness of wicking geotextile depends on many factors’ which have not been fully evaluated. Currently, there is no design method or guideline available to incorporate the water content reduction benefit of the wicking geotextile. A series of laboratory tests, including demonstration tests, water removal tests, small box tests, and soil column tests, were conducted in this study to investigate the hydraulic characteristics of the wicking geotextile when in contact with free water and/or soil. Six large-scale cyclic plate loading tests with rainfall simulation were conducted to evaluate the effect of the wicking geotextile on the permanent deformations of base courses over weak subgrade. Based on the test results, the mechanisms of the wicking geotextile in removing water from base courses were investigated. The small box tests, the soil column tests, and the large-scale cyclic plate loading tests provided relationships between base course water content and drainage time. Design guidelines that incorporate the water content reduction benefit of the wicking geotextile were developed by modifying the 1993 AASHTO Pavement Design Guide and the Mechanistic-Empirical Pavement Design Guide.
    URI
    http://hdl.handle.net/1808/27800
    Collections
    • Dissertations [4050]

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps