Evaluation of Otta Seal Surfacing for Low Volume Roads in Iowa, TR-674

Iowa has approximately 72,800 miles of unpaved secondary roads with very low daily traffic volumes. Iowa's County secondary road departments spent more than $72 million for aggregate replacement in 2008 alone. Otta seals may be able to provide an alternative to a traditional bituminous surface treatment as well as an alternative to maintaining granular roads with constant replenishment of granular materials. This project will: evaluate the feasibility of Otta seals as an alternative surface treatment on low volume roads using local aggregate, including lower quality aggregates; evaluate the cost-effectiveness and performance of Otta seals; develop a guide for road selection; identify local projects for field demonstrations; and, evaluate installed Otta seal performance through seasonal changes and laboratory testing.

  • Supplemental Notes:
    • Addendum 497, TR-674


  • English


  • Status: Completed
  • Funding: $149995.00
  • Contract Numbers:


    Addendum 497

  • Sponsor Organizations:

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010
  • Project Managers:

    Dunn, Mark

  • Performing Organizations:

    Iowa State University, Ames

    Institute for Transportation Studies
    2711 S. Loop Drive, Suite 4700, Program for Sustainable Pavement Engineering and Research (PROSPER)
    Ames, IA  United States  50010-8864

    Iowa State University, Ames

    Department of Civil, Construction and Environmental Engineering
    Town Engineering Building
    Ames, IA  United States  50011-3232
  • Principal Investigators:

    Kim, Sunghwan

    Gopalakrishnan, Kasthurirangan

    Gransberg, Douglas

    Jahren, Charles

    Ceylan, Halil

  • Start Date: 20140501
  • Expected Completion Date: 20180630
  • Actual Completion Date: 20180518
  • Source Data: RiP Project 36324

Subject/Index Terms

Filing Info

  • Accession Number: 01520417
  • Record Type: Research project
  • Source Agency: Iowa Department of Transportation
  • Contract Numbers: TR-674, Addendum 497
  • Files: RiP, STATEDOT
  • Created Date: Mar 29 2014 1:01AM