Download or read book Deterioration of Parking Structures Research Project written by Canada Mortgage and Housing Corporation and published by CMHC. This book was released on 1993* with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of 62 garages was monitored over a four-year period. Standard condition survey protocols for conventionally reinforced and post-tensioned garages were developed. The structures were located in six provinces of Canada and had various characteristics (age, state of repair, mode of rehabilitation, etc.). The features of the garages and their repair history are documented in the appendices of the report. The performance of penetrating concrete sealers and of some membranes was also investigated. Some of the major findings of the survey are: -Deteriorating parking structures, designed and constructed without adequate protection against corrosion of the reinforcing steel, can be kept in a serviceable condition, probably until the end of their design life. -No single repair method is superior to another, but early repair is clearly the most effective from technical and economic viewpoints. The most common repair method, "Patch and Waterproof" works quite well on the whole, but care must be exercised to achieve a good bond between the existing and new concretes. -Garages, even of the same structural type do not deteriorate at the same rate. The deterioration rate of similar reinforced concrete decks in the sample, expressed in terms of the deteriorated area as determined by chain-drag testing, varied between 5.8% / year to 0.06% / year.