Abstract
In this study, for the establishment of the performance evaluation methods and the quality control standard of durability recovery method, the quantitative exposure data by long term exposure test under the coast and air environment is accumulated and analyzed. Investigating and evaluating the result of exposure test during 18 months of exposure age under the coastal and normal atmosphere environment, micro crack, swelling and spatting of surface coating material crack of repair standards of repair material and method through continuous exposure test in the future. က
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