Condition Evaluation of In-Service Chemically Stabilized Subgrades in a High Sulfate Environment

Ohio Department of Transportation's (ODOTs) Office of Pavement Engineering adopted a practice of reducing the pavement design thickness where chemical stabilization is performed (i.e., a pavement design credit). The ODOT districts are very motivated to take advantage of this to improve chemical stabilization, and to save money on pavement costs. The issue is that sulfates are not discovered during design; they are discovered during construction, which forces a decision on how to proceed using one of the following options: (a) chemically stabilize, build the thinner pavement, and hope no adverse conditions develop; or (b) do not chemically stabilize and somehow change the pavement build-up in construction. This decision making is happening in real time, without data to guide the decision one way or another. This project will evaluate the chemically stabilized subgrade at recently constructed projects with both low and high sulfate levels to identify the physical and mineral properties of the chemically stabilized subgrade, which will determine if any adverse conditions have developed. The conclusions of this research should allow for ODOT to make better informed decisions with regards to performance/non-performance of chemical stabilization.


  • English


  • Status: Active
  • Contract Numbers:




  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Managing Organizations:

    Ohio Department of Transportation

    Research Program
    1980 West Broad Street
    Columbus, OH  United States  43223
  • Project Managers:

    Nye, Kelly

  • Performing Organizations:

    Ohio University, Athens

    Athens, OH  United States  45701
  • Principal Investigators:

    Sargand, Shad

  • Start Date: 20160926
  • Expected Completion Date: 20171226
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01613004
  • Record Type: Research project
  • Source Agency: Ohio Department of Transportation
  • Contract Numbers: 27960, 103680, 135443
  • Files: RiP, STATEDOT
  • Created Date: Oct 7 2016 8:09AM