Use of Nondestructive Testing in Structural Rehabilitation Decisions for Primary Urban Corridor (05-0960)
Curtis F. Berthelot, University of Saskatchewan, Canada
Tom Gehlen, Pavement Scientific International, Canada
Tom Scullion, Texas A&M Transportation Institute
Doug Drever, City of Saskatoon, Canada

Circle Drive from Millar Avenue to Idylwyld Drive in the City of Saskatoon is the primary east-west commercial corridor in the north industrial area of Saskatoon. Over recent years, Circle Drive has experienced severe permanent deformation and localized structural failures. The cost to structurally rehabilitate Circle Drive using conventional full depth remove and replace has been estimated to be $6.0 M to $8.0 M. In an attempt to identify more cost effective structural rehabilitation solutions, City of Saskatoon Public Works structurally evaluated Circle Drive from Millar Avenue to Idylwyld Drive using non-destructive structural assessment techniques; including ground penetrating radar and heavy weight deflection measurements. Based on the non-destructive testing results, Circle Drive was found to be relatively structurally sound, with some localized areas requiring structural rehabilitation. A surgical full depth strengthening and resurfacing system that exploits the significant areas of sound structural integrity was developed and is estimated to cost between $3.5 M and $5.0 M. The resulting surgical full depth structural rehabilitation strategy could save between $1.0 M and $4.5 M in capital expenditure. In addition, the surgical strengthening system proposed will significantly reduce user delay costs and interruption costs for businesses located along Circle Drive.