FRP rehabilitation of façades in a Toronto district school board facility

The use of externally bonded glass fibre reinforced polymer (GFRP) reinforcement to repair deteriorated precast concrete mullion units in an 80 year old school building for the Toronto District School Board (TDSB) is presented. GFRP flexible sheets were applied longitudinally for flexural enhancement and were applied transversely around the whole cross-section of each mullion for confinement. Epoxy injection was used to seal all the cracks prior to GFRP application. The different phases of the project are discussed including: condition assessment, GFRP repair scheme, surface preparation, and application of the GFRP repair system. There was a realized cost efficiency in which the GFRP technique cost was less than that of the other techniques considered.