Durability of parking structures: analysis of field survey

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Proceedings titleACI SP
ConferenceConcrete Durability: Katharine and Bryant Mather Int. Conf.: 27 April 1987, Atlanta, GA
Pages150325; # of pages: 1479
Subjectparking garages; concrete (materials); durability; corrosion; repairing; waterproof coatings; salts; chloride; air entrainment; concrete durability; chlorides; corrosion; parking facilities; patching; repairs; surveys; waterproofing; Parking garages; garage de stationnement; beton (materiau); durabilité; corrosion; reparation; complexe d'étanchéité; sel ( chimie); chlorure
AbstractA total of 215 garages in Toronto, Ottawa and Montreal, Canada, have been surveyed to various extents by assessing delamination, half-cell potential, depth of cover, and component condition. In addition, tests were carried out on cores, in which chloride content, compressive strength, and chloride permeability were determined and the air void system was analysed. The evidence indicates that durable garages can be built, and that poor performance must be attributed to design and construction practices whose effectiveness falls short of that required by the environment. It follows that almost all previously built garages will eventually require repair unless upgraded before the chloride concentration of the concrete reaches a critical level. Repair by the "patch and waterproof" method was found to decrease the rate of corrosion of deteriorated garages by approximately 70 percent. Detrimental effects following installation of a waterproofing membrane over concrete with elevated chloride concentration were not observed. No relation was detected between extent of delamination and crack density or compressive strength. Half-cell potential did not prove more sensitive than the chain-drag test in detecting delamination.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number28325
NPARC number20377439
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Record identifier6feb891a-2a9e-4ee3-929b-68f334ab88e9
Record created2012-07-24
Record modified2016-05-09
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