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.

    Experimental and Analytical Procedures to Characterize Mechanical Properties of Asphalt Concrete Materials for Airfield Pavement Applications

    Thumbnail
    View/Open
    Available after: 2021-05-31 (6.909Mb)
    Issue Date
    2018-12-31
    Author
    Bazzaz, Mohammad
    Publisher
    University of Kansas
    Format
    246 pages
    Type
    Dissertation
    Degree Level
    Ph.D.
    Discipline
    Civil, Environmental & Architectural Engineering
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    In the past two decades, the pavement mechanics community have made a significant progress in developing mechanistic-based constitutive relationships for asphalt concrete materials, flexible airfield pavements, and roadways. However, a number of factors have caused the community not to properly adopt and implement these sophisticated constitutive relationships in design and refined analysis of asphalt concrete pavements. The lack of straightforward experimental and/or analytical procedures to extract the material properties associated with these models is the main reason for the community to avoid adopting these sophisticated mechanistic-based models. Available characterization methods either are over-simplified or require extensive laboratory tests and analyses procedures to extract the material properties associated with asphalt concrete materials. Furthermore, the immergence of next generation heavy aircraft and heavy trucks require such characterization methods to design the experiments and analysis procedures to account for high tire contact stresses. This dissertation aims to develop straightforward experimental and analytical procedures to characterize coupled viscoelastic, viscoplastic, and hardening-relaxation viscoplastic properties of asphalt concrete pavements while maintaining the required level of accuracy by incorporating the important factors affecting these mechanisms. Therefore, this dissertation proposes laboratory tests and analysis procedures to systematically calibrate and validate a comprehensive constitutive material model for asphalt concrete materials. The proposed method accounts for multi-axial state of stresses; deviatoric, confinement, and shear stress levels; and time-, temperature-, and rate-dependent response of asphalt concrete when subjected to high tire pressures. Separate laboratory tests were required to measure and calibrate the individual response of asphalt concrete materials at appropriate temperatures and loading rates. The proposed characterization methods are then applied to four different asphalt mixtures used in Federal Aviation Administration (FAA)’s National Airport Pavement and Materials Research Center (NAPMRC) test sections to evaluate the efficacy of the methods. This dissertation presents a straightforward procedure that allows for identification of nonlinear viscoelastic response of asphalt concrete. This procedure incorporates the effect of confinement and deviatoric stress levels into the analysis procedure along with a laboratory test that can be used systematically to extract nonlinear viscoelastic parameters. Furthermore, a straightforward procedure that allows for identification of viscoplastic and hardening-relaxation viscoplastic response of asphalt concrete materials were proposed. This procedure incorporates the genetic algorithms into the analysis procedure to extract viscoplastic and hardening-relaxation viscoplastic properties of asphalt concrete materials as one of many engineering optimization problems along with a laboratory test that can be used systematically to extract viscoplastic and hardening-relaxation viscoplastic response of asphalt concrete materials. The presented tests are mimicking the realistic general multi-axial state of stresses observed in a pavement structure. Moreover, rheological properties and stress-dependent behavior of modified/unmodified asphalt binders plus Evotherm–M1 additive were evaluated using multiple stress creep-recovery tests and strain controlled frequency sweep tests in different ranges of interest frequencies, temperatures and strains. The test data is analyzed to improve the Pavement Analysis using Non‐linear Damage Approach – Airfield Pavements (PANDA‐AP) calibration protocol and extract the material properties of asphalt concrete pavements.
    URI
    http://hdl.handle.net/1808/29538
    Collections
    • Engineering Dissertations and Theses [1055]
    • Dissertations [4472]

    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