This Update reviews NRC-IRC research on the fire resistance of externally bonded, fibre-reinforced polymer (FRPs) systems used for repairing concrete building members. The research showed that FRP systems that include specially designed insulation can enable repaired or strengthened concrete members to exceed the 4-hour fire resistance requirements of building codes. Full story
The use of de-icing salts can significantly reduce the service life of concrete transportation structures by causing corrosion of the reinforcing steel. This Update provides guidance on controlling corrosion, drawing on a ten-year study to assess the performance of eight commercial corrosion-inhibiting systems on a concrete highway bridge. Full story
Permanent damage to older masonry walls and premature failure of repointing work can result from improper selection and application of repointing mortars. This Update describes key design elements for achieving successful repointing of masonry walls to provide a longer service life for both the masonry units and the mortar. Full story
This Update presents information critical to the successful application of repointing mortars for the conservation of older masonry buildings . Full story
Lasting repairs of deteriorated concrete structures depend on careful selection of materials and methods suitable for the service and application conditions. This Update describes the factors that facility managers and designers need to consider to ensure durable repairs. The factors discussed address the restoration of serviceability and the correction of cosmetic defects and are not applicable to failures resulting from overloading. Full story
Alkali-aggregate reaction is a common cause of concrete cracking that results in significant damage to concrete structures worldwide. This Update explains the mechanisms of alkali-aggregate reaction, its effects on concrete and methods for preventing deterioration from this cause in new construction. Full story
Archived Content Information identified as archived is provided for reference, research or recordkeeping purposes. It is not subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. Please contact us to … Full story
This Update describes the nature and causes of traffic-induced vibrations in buildings, and discusses possible remedial and preventive measures. The focus is on houses. Full story
This Update discusses how the preparation of the substrate, prevailing ambient conditions and application practices affect the performance of membrane systems installed on concrete decks in parking garages. Full story
This Update briefly reviews the main factors that determine the extent of building failure and loss of life during earthquakes. It also describes guidelines for evaluating and upgrading existing buildings with regard to earthquake resistance. Full story
