This study, the introduction of ozone-treated water inside the concrete structure for anti-corrosive material in contact with ozone, in part or in such a possibility should be considered material for corrosion resistance. By ozone degradation of anti-corrosive material Preference greatly decolorization and melting occurs, and the process that occurs in water suggesting that threats these, water safety, and domestic anti ozone material not associated with KS specifications more difficult to manage. For this reason, structures with ozone resistance must be provided, at the national level of material development, performance evaluation of test methods have been emerging as enacted an urgent task. Through these four test methods sensual, qualitative and quantitative degree of degradation caused by ozone can be measured. Measurement of color difference, as the case of Schmidt hammer and is non-destructive test methods are found that can be utilized. Based on the above-mentioned information, chrominance and find a correlation between surface degradation study is further deemed necessary. In this study, four kinds of test methods utilizing ozone-resistant materials, assessment of performance is expected to be utilized as a method.
Recently, It has increased to use ultra high strength concrete. It is effective to mix organic fibers for preventing spalling. But if fiber mixed, flowability of concrete is decreases. The aim of this study is to evaluation of fire resistance performance for fiber-mixed ultra high strength concrete on field application. As a result, flowability of nylon fiber mixed concrete is better than polyethylene fiber mixed. In non-fiber and polyethylene fiber mixed concrete, spalling occurred. And strain converged at 0.004. Also, residual strength could not evaluate. Nylon fiber mixed concrete is effective to prevent spalling. And it remians 50% residual strength compare with compressive strength at room temperature.
In this study, for the establishment of the performance evaluation methods and the quality control standards of durability recovery method, the quantitative exposure data by long term exposure test under the coastal and normal atmosphere environment is accumulated and analyzed. Investigating and evaluating the result of exposure test during 54 months of exposure age, micro crack, swelling and spalling of surface coating material, crack of repair boundary parts and the great potential difference between repair part and non-repair part were somewhat generated. But carbonation depth and chloride-ion penetration depth very little penetrated than cover depth and it seems reasonable to conclude that main cause of corrosion of reinforcing bar are macro cell from the result of corrosion area. Therefore, it is considered to be applied as the fundamental data on the performance evaluation and quality control standards of repair material and method through continuous exposure test in the future.
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