A Hybrid Sensor for Rapid Assessment of Sulfate-Induced Heaving in Stabilized Soils

This project developed and demonstrated the use of a hybrid sensor based on Bender Element and Time Domain Reflectometry technologies and an algorithm for the rapid assessment of the susceptibility of chemically-treated sulfate-rich soils to sulfate heaving. The developed sensor was embedded in lime- and cement-treated soils to monitor changes in both moisture content and shear wave velocity at various time periods. Laboratory assessments indicated that cement treated soils experienced higher stiffness losses as compared to lime treated soils. For field implementation and validation, a test section was chosen in the median area between Highway 114 and International Parkway near Dallas/Fort Worth airport. Sulfate tests conducted on the natural soils indicated the sulfate contents was in excess of 30,000 ppm. A 25-ft. x 60-ft. section was built in this area and the subgrade was treated with 6% lime. The developed hybrid sensor was embedded at a depth of 8 in. in the treated section. The treated section was watered three times a day to keep continuous supply moisture for uninhibited sulfate reactions in the treated soil. Field test results indicated a reduction in shear modulus with time in the lime treated test section. The results also reconfirm the laboratory findings that the shear modulus decreased in chemically treated sulfate rich soils owing to the deleterious reactions among soils and mineral and chemical stabilizers. Addition field testing and evaluation is needed before this technology can be implemented by highway agencies.


  • English


  • Status: Completed
  • Contract Numbers:

    Project 20-30, IDEA

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Jawed, Inam

  • Performing Organizations:

    University of Texas, Arlington

    P.O. Box 4089
    Arlington, TX  United States  76010
  • Principal Investigators:

    Puppala, Anand

  • Start Date: 20141212
  • Expected Completion Date: 0
  • Actual Completion Date: 20131112
  • Source Data: RiP Project 38388

Subject/Index Terms

Filing Info

  • Accession Number: 01547687
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-30, IDEA
  • Files: TRB, RiP
  • Created Date: Dec 13 2014 1:01AM