Jefferson Street Parking Garage Assessment and Rehabilitation, Pensacola, FL
Repair methods are to be performed by a qualified contractor with experience in concrete repairs, methods and materials. Manufacturers of concrete repair mortar provide free qualifications of their materials including preparation and application requirements. Repair conditions are based on location and medium with all repair approaches. For spalling and corroded steel repairs: The concrete area around damage should be surveyed to determine extents of poor concrete. Poor or unsound concrete is removed to quality base material. All corroded steel is to be cleaned with any reinforcing which has been damaged by 15% or more to be replaced / repaired with new steel. New concrete repair mortar shall be installed in the demolished void flush to the original area. Installation shall be per manufactures written directions to a finish quality equal to the surrounding original finish. Concrete repair mortars are classified for the repair location and are identified for repairing overhead, vertical, horizontal and using the correct material is crucial to a quality repair. For cracks without spalling concrete: These can be repaired with epoxy repair material which is injected into the crack. Manufacturers written directions must be followed including damming, forming and inspection port requirements. Identified cast-in-place concrete cracks to be repaired when they exceed 1.0 mm in width. Precast concrete cracks wider than 0.5 mm are to be repaired with the difference being that the precast is part of the superstructure and more critical.