Field Performance of Continuously Reinforced Concrete Pavement in Illinois

摘要

This report reviews the design and performance of continuously reinforced211u001econcrete pavement (CRCP) in Illinois. Illinois has built over 4,267 two-lane km 211u001e(2,650 miles) of CRCP on the Interstate system since the mid-1950s. CRCP has been 211u001econstructed on nearly all urban freeways in the Chicago area and has shown 211u001eexcellent performance under severe weather and heavy traffic conditions. The 211u001eeffect of key design and construction parameters on long-term CRCP performance is 211u001einvestigated using a database that was compiled based on field surveys conducted 211u001efrom 1977 to 1994 by the Illinois Department of Transportation (IDOT). Analysis 211u001eof the data shows the following variables have significant effects on 211u001eperformance: longitudinal reinforcement content (greatest effect of all 211u001evariables), slab thickness (also very significant), traffic load applications, 211u001edepth of reinforcement, base type, and D-cracking of concrete. CRCP built with 211u001etubes or chairs exhibited overall about the same performance. Experimental field 211u001estudies in Illinois showed that depth of reinforcement has a large effect on 211u001ecrack width and, eventually, on punchouts.