Thin Bonded Portland Cement Concrete Overlay, HR-520, 1990

(1990) Thin Bonded Portland Cement Concrete Overlay, HR-520, 1990. Transportation, Department of

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Abstract

A four and one-half inch thick, bonded portland cement concrete (PCC) overlay and integral widening were used to rehabilitate a 4.5 mile section of Iowa route 141 from US 169 to Iowa 210 in Dallas County. There was a substantial amount of cracking in the old 20 feet wide PCC pavement. Most of the widening, which was tied to the original slab by dowel bars, was placed as a four feet wide section on one side. Coring has shown that the overlay is well bonded and testing with the Delamtect has shown less than 1% debonding. Midpanel transverse cracks in the old pavement have reflected through the overlay (as expected). Some new transverse cracking has occurred. This cracking has not caused any significant problems. In general, the overlay is performing quite well.

Item Type: Departmental Report
Keywords: Bonding, Maintenance, Pavement cracking, Portland cement concrete, Transverse cracking
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Roads and highways
Transportation > Research
ID Code: 17081
Deposited By: Iowa DOT Library
Deposited On: 04 Jun 2014 19:30
Last Modified: 15 Jan 2015 15:33
URI: http://publications.iowa.gov/id/eprint/17081