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Accession Number PB2013-102320
Title Evaluating the Effect of Slab Curling on IRI for South Carolina Concrete Pavements.
Publication Date Oct 2010
Media Count 30p
Personal Author A. M. Johnson B. C. Smith L. W. Gibson W. H. Johnson
Abstract Concrete pavements are known to curl due to a temperature gradient within the concrete caused by both daily and seasonal temperature variations. This research project measured the magnitude of concrete pavement slab curling of two newly constructed jointed plain concrete pavements in South Carolina and the effect of the slab curling on rideability of the pavements. Three methods were used to measure the amount of slab curling: digital indicators suspended over the pavement surface, a terrestrial laser scanner, and a high-speed inertial profiler. It was found that the pavements showed small changes in curvature as the temperature increased during the day. These changes also correlated to increases in the International Roughness Index (IRI) measurement of the pavement, the IRI increase were found to be less than 10 inches/mile on days with large swings in temperature. The change in IRI from seasonal temperature variations was in the range of 1 to 4 inches/mile. Based on this research project, it is recommended that SCDOT schedule its quality acceptance rideability testing of concrete pavements for the same time of day (i.e. afternoon) to reduce the variation in the IRI measurements caused by daily temperature cycles and make measurements from different roads more comparable.
Keywords 3d laser scanner
Concrete pavements
Digital indicators
Pavement design
Pavement surface
Slab curing
South Carolina

Source Agency Federal Highway Administration
NTIS Subject Category 89C - Construction Management & Techniques
50C - Construction Equipment, Materials, & Supplies
89G - Construction Materials, Components, & Equipment
Corporate Author South Carolina Dept. of Transportation, Columbia. Research and Materials Div.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1304
Contract Number SPR-688

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