Portland Cement Concrete Patching Techniques vs. Performance and Traffic Delay

Project Details
STATUS

Completed

START DATE

01/01/03

END DATE

01/15/04

RESEARCH CENTERS InTrans, CP TECH, CTRE
SPONSORS

Dept of Civil, Construction, and Environmental Engineering, ISU

Researchers
Principal Investigator
James K. Cable

Faculty Affiliate

Co-Principal Investigator
Kejin Wang

PCC Engineer, CP Tech

About the research

Standards for the construction of full-depth patching in portland cement concrete pavement usually require replacement of all deteriorated based materials with crushed stone, up to the bottom of the existing pavement layer. In an effort to reduce the time of patch construction and costs, the Iowa Department of Transportation and the Department of Civil, Construction and Environmental Engineering at Iowa State University studied the use of extra concrete depth as an option for base construction. This report compares the impact of additional concrete patching material depth on rate of strength gain, potential for early opening to traffic, patching costs, and long-term patch performance. This report also compares those characteristics in terms of early setting and standard concrete mixes. The results have the potential to change the method of Portland cement concrete pavement patch construction in Iowa.

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