Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders, Phase II (TR-591)

Project Details
STATUS

Completed

START DATE

04/01/08

END DATE

05/31/11

RESEARCH CENTERS InTrans, CEER, CMAT, CTRE
SPONSORS

Iowa Department of Transportation
Reilly Construction Co.

Researchers
Principal Investigator
Charles Jahren

Associate Director, Construction Materials and Methods / Asset Management

Co-Principal Investigator
David White

Geotechnical Engineer

Student Researcher(s)
Peter Becker
Chase Westercamp
Thang Phan

About the research

Edge ruts can quickly develop in certain critical locations causing severe safety problems that require managers to quickly redirect resources away from routine maintenance tasks and compromising efficiency. Therefore, this issue can disrupt the entire workflow for a maintenance group with ripple effects that could result in situations where seemingly unrelated maintenance issues receive less attention than they should.

A multifaceted investigation was undertaken as part of this project to develop recommendations for methods to stabilize granular road shoulders with the goal of mitigating edge ruts. Included was reconnaissance of problematic shoulder locations, a laboratory study to develop a method to test for changes in granular material stability when stabilizing agents are used, and the construction of three sets of test sections under traffic at locations with problematic granular shoulders.

 

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