Cold In-Place Recycling Project Selection and Guidance for Iowa Roadways

Project Details
STATUS

In-Progress

PROJECT NUMBER

19-695, TR-774

START DATE

07/01/19

END DATE

06/30/21

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, AMPP, CTRE
SPONSORS

Iowa Department of Transportation

Researchers
Principal Investigator
Ashley Buss

Faculty Affiliate

Co-Principal Investigator
Hosin "David" Lee

University of Iowa

Co-Principal Investigator
Junxing Zheng

Iowa State University

About the research

Cold in-place recycling (CIR) has been a cost-effective rehabilitation treatment and while many Iowa CIR roadways have performed well, there have been instances of early failures and under performance. This project leverages past CIR research in Iowa to update expected performance of CIR, identify under-performing roadways and investigate factors that contribute to under performance. Materials from excellent and under-performing roadways will be tested, analyzed, and results presented. The key deliverables for this project include a stand-alone guidance for CIR project selection guidance, and a tool to evaluate the cost-effectiveness of a CIR pavement rehabilitation alternative.

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