DURABILITY OF SHOTCRETE REHABILITATION TREATMENTS OF BRIDGES IN CANADA. IN: 1991 TAC ANNUAL CONFERENCE, PROCEEDINGS. VOLUME 2. SEPTEMBER 15-16, 1991, WINNIPEG, MANITOBA, CANADA

This study was undertaken in view of the fact that a wide range of shotcrete methodologies are being used for repair of bridge structures in different parts of Canada, but little is known about the durability of such repairs. In the preliminary phase of the study, 61 bridges distributed throughout the provinces of Alberta, British Columbia, Ontario and Nova Scotia, were examined. This paper summarizes the results of this investigation and qualitatively rates the performance of the various shotcrete repairs using descriptions such as excellent, good, fair, poor and failed. Photographic documentation is provided illustrating the field performance of a wide range of different types of shotcrete repair and rehabilitation practices.