Current ICT Project
Investigators:
  Prof. Erol Tutumluer (Primary), Dr. Abbas Butt
Project Title:
  Characterization of IL Aggregates for Subgrade Replacement and Subbase
Start Date: 1/1/2006
End Date: 6/30/2009
Summary of Project:
  This project examines the characteristics of Illinois aggregates to determine relationships between different aggregate properties and IBR / IBV and also determine the sensitivity of the aggregate IBR / IBV to changes in moisture content. The resulting information would be incorporated into the Subgrade Stability Manual to allow consideration of aggregate characteristics when determining thickness. The information would also be used to create more appropriate specifications for aggregate used in these applications.
Objective of Project:
  The overall objective is to characterize strength, stiffness, and deformation behavior of various types and qualities of aggregate commonly used in Illinois for an improved prediction of cover thickness requirements and field performances. The project focus is on pavement construction working platform issues.
Expected Outcome:
  With successful completion of all the research tasks, great savings will be realized in IDOT construction projects through proper aggregate selection/utilization according to aggregate properties and their validated field performances. The ultimate benefit will be achieved for making more economical use of the aggregates in the State of Illinois by either reducing treatment thickness or avoiding aggregate failures. IDOT Districts and local agencies would be the primary users of this information. The resulting revisions to the Subgrade Stability Manual and Specifications will reduce the Department’s overall expenditure on aggregate in subgrade applications.
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Last Updated: 11/18/2009