Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations

Prior to pavement construction, extreme precipitation events can impact subgrade strength. Additionally, the amount and distribution of stabilizer in the subgrade soil can significantly impact the long-term behavior of the roadway. The desired amount of stabilizer is specified in the design phase, but currently, there is no reliable way to verify that field stabilization values are consistent with specified design values. There is also no standard process for determining how well the stabilizer is distributed, both spatially and throughout the required design depth. The goal of this research project is to validate the portable field employed X-Ray Fluorescence (PFXRF) test by assessing its detection accuracy on selected roadway stabilization projects. In addition, the PFXRF will be used to assess the depth and spatial heterogeneity of the stabilization across a site. At the end of the project, recommendations will be developed for transportation officials regarding how to employ PFXRF and how to implement a laboratory XRF testing protocol for job site quality control applications. X-Ray Fluorescence (XRF) can be utilized after extreme precipitation events, in which stabilizer leaching is suspected. It can also be used during forensic investigations, where the presence or lack of additive in a stabilized layer needs to be determined.

  • Supplemental Notes:
    • Additional Contract Number: ODOT SPR 2160(A)

Language

  • English

Project

  • Status: Active
  • Funding: $350648.00
  • Contract Numbers:

    DTRT13-G-UTC36

    SPTC 14.2-02

  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue
    Washington, DC  United States  20590

    University of Oklahoma, Norman

    Office of Research Services
    201 David L. Boren Boulevard, Suite 150
    Norman, OK    73019

    University of Oklahoma, Norman

    School of Civil Engineering and Environmental Science
    202 West Boyd Street, Room 334
    Norman, OK  United States  73019

    Oklahoma Department of Transportation

    200 NE 21st Street
    Oklahoma City, OK  United States  73105
  • Performing Organizations:

    University of Oklahoma, Norman

    School of Civil Engineering and Environmental Science
    202 West Boyd Street, Room 334
    Norman, OK  United States  73019
  • Principal Investigators:

    Miller, Gerald

    Cerato, Amy

  • Start Date: 20141001
  • Expected Completion Date: 0
  • Actual Completion Date: 20160930
  • Source Data: RiP Project 37456

Subject/Index Terms

Filing Info

  • Accession Number: 01543091
  • Record Type: Research project
  • Source Agency: Southern Plains Transportation Center
  • Contract Numbers: DTRT13-G-UTC36, SPTC 14.2-02
  • Files: UTC, RiP
  • Created Date: Nov 5 2014 1:01AM