Ultra-thin Portland cement concrete overlay extended evaluation
By: James K. Cable, L.E. Edgar and D.R. Anderson
Contributors: Edgar, L.E.; Anderson, D.R.; Iowa. Highway Research Board; Iowa. Department of Transportation
Publisher: Dept. of Civil, Construction, and Environmental Engineering, Iowa State University
Published: 2005
Place of publication: Ames, Iowa
Language: eng
Subjects: Pavements; Overlays; Concrete Pavements; Maintenance and repair; Portland cement; Overlays (pavements); Portland cement concrete; Whitetopping
Description: The Iowa ultra-thin project demonstrated the application of thin portland cement concrete overlays as a rehabilitation technique.  It combined the variables of base preparation, overlay thickness, slab size, and fiber enhancement into a series of test sections over a 7.2-mile length.  This report identifies the performance of the overlays in terms of deflection reduction, reduced cracking, and improved bonding between the portland cement concrete (PCC) and asphalt cement concrete (ACC) base layers.  The original research project was designed to evaluate the variables over a 5-year period of time.  A second project provided the opportunity to test overlay rehabilitation techniques and continue measurement of the original overlay performance for 5 additional years.
Notes: "January 2005."

Final report.

Also available via the Internet.

Sponsored by the Highway Division, Iowa Dept. of Transportation, Project Development Division, and the Iowa Highway Research Board. Iowa DOT project TR-432.