![]() ![]() ![]() The weathered and unweathered cores were then ponded with a salt water mixture, and the rate of chloride ingress was measured over an extended period of time. Several of the treated cores were subjected to accelerate weathering to simulate the effects of ultraviolet radiation and general weathering typical of the Syndey area. The cores were treated with a 100 percent solids silane sealer. In order to develop an appropriate long-term strategy for the concrete elements of the opera house, small concrete cores were removed from the roof shell structure and tested in the WJE laboratory studies. WJE corrosion experts reviewed chloride test data collected from the exposed precast concrete ribs and concluded that protection measures were required to mitigate future chloride ingress. Recommendations were also given regarding the use of cathodic protection and repair techniques for the marine skirt panels around the structure. WJE has performed a variety of investigations and subsequent repair recommendations for the Sydney Opera House, including sealing the joints between the precast mortar panels of the roof shell and the using moisture monitoring equipment to detect water leaks.
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