CTRE is an Iowa State University center, administered by the Institute for Transportation.

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Iowa State University--Becoming the Best

Portland Cement Concrete Patching Techniques vs. Performance and Traffic Delay


Principal investigators:

Co-principal investigators:

Project status


Start date: 01/01/03
End date: 01/15/04


Report: Portland Cement Concrete Patching Techniques vs. Performance and Traffic Delay (1.8 mb pdf) January 2004

Tech transfer summary: PCC Patching Techniques: Performance vs. Traffic Delay Time ( pdf) Oct 2005


Sponsor(s): Dept of Civil, Construction, and Environmental Engineering, ISU

About the research

Abstract: 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.