CASE STUDY: REPAIR OF A 12-YEAR OLD PRECAST CONCRETE FACADE

摘要

It is the authors' intent to demonstrate the variety of issues to be considered and the proper repair techniques to be implemented on a precast concrete facade that suffered from a variety of afflictions. The facade repairs for the subject building addressed design and construction deficiencies including panel cracking, corrosion related distress at anchorages, and installation of supplemental panel fixings (supports) to resist hurricane-force wind loads. This paper also describes the selection of joint sealant and a unique two component clear water repellent system, which was used to preclude further streaking and eventual etching of the glass surfaces. Lessons learned from this case history could be used to establish general guidelines for evaluation, repair and protection of facades of similar type.