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A Study on the Deterioration Condition and Renovation Work for High-Rise Reinforced Concrete Apartment in Japan - The Practice Project Kajima Corporation Minaminagasaki Dormitory

High-rise housing buildings were first built approximately 45 years ago in Japan and these buildings currently are old and deteriorated facing the need of repair. In this study, I present a practical case - Kajima Corporation Minaminagasaki Dormitory, one of the oldest high-rise reinforced concrete buildings in Japan. The purpose of this study was to identify the main content and cycle of the repair work, as well as examine and generalize the causes of deterioration in this building. In conclusion, there are 4 factors affecting the renovation of high-rise buildings, including air, light, water pressure and operation. There are several types of renovation works at skeleton and infill part arranged. In the public area, exterior wall repair and roof waterproofing could be seen in 15-years cycle. Balcony rail repair and furniture of revolving windows were repaired in 5~10-year cycle. In the private area, prefabricated bath, bath heater, bathtub at bathroom and sink at kitchens were replaced in 15-year cycle. In order to sustain good quality resident environment within existent high-rise housing buildings, it's necessary for construction industry to develop new technology and upgrade the function today. Government should also devote to the revision of the laws for housing environment improvement.