Concrete Overlay Field Application Program

Project Details
STATUS

Completed

START DATE

04/07/08

END DATE

05/31/12

RESEARCH CENTERS InTrans, CP TECH, CTRE
SPONSORS

Federal Highway Administration Concrete Overlay Field Application Program DTFH-61-06-H-00011 (W13)
Iowa Department of Transportation
Iowa Highway Research Board

Researchers
Principal Investigator
Paul Wiegand

Director, SUDAS

Principal Investigator
Tom Cackler

Associate Director for Construction Research and Advanced Technology

Co-Principal Investigator
James K. Cable

Faculty Affiliate

About the research

The National Concrete Pavement Technology Center, Iowa Department of Transportation, and Federal Highway Administration set out to demonstrate and document the design and construction of portland cement concrete (PCC) overlays on two-lane roadways while maintaining two-way traffic. An 18.82 mile project was selected for 2011 construction in northeast Iowa on US 18 between Fredericksburg and West Union.

This report documents planning, design, and construction of the project and lessons learned. The work included the addition of subdrains, full-depth patching, bridge approach replacement, and drainage structural repair and cleaning prior to overlay construction. The paving involved surface preparation by milling to grade and the placement of a 4.5 inch PCC overlay and 4 foot of widening to the existing pavement. In addition, the report makes recommendations on ways to improve the process for future concrete overlays.
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