Investigation of Location of Dowel Bars Placed by Mechanical Implantation
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1983-05-01
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TRIS Online Accession Number:00377268
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Edition:Interim Report
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Design;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;
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Abstract:The report describes the results of work conducted as a phase of a study concerned with the restoration of load transfer to existing jointed concrete pavements. Five projects were selected for study to determine the location of dowel bars placed by mechanical implantation and in basket assemblies. A one percent stratified random sample of bars were selected for coring to determine depth, horizontal and vertical rotation and vertical alignment. Measurements were also made with a metal detector on additional bars. The study found substantial problems with the mechanically placed dowels with respect to alignment and rotation with much better results being obtained with the basket assemblies. It was noted that saw-cut location affected longitudinal alignment to a large extent on both basket and implanted dowels. It was noted that no pavement distress related to dowel bar misplacement had occurred after three years of traffic even for locations with dowel bars with extremely large horizontal and vertical rotation.
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