2007 年 5 巻 2 号 p. 2_69-2_75
For the rapid increase of waste generation from building demolitions and improvement of infrastructure in the next 30 years, the problem such as demand-supply imbalance of recycled concretes and asphalt-concretes has predicted to be caused. With this background the laws and rules (law system) for construction and demolition waste recycling has an important position at nationwide level. But the law system, which command recycle through the separation of demolition wastes and expect for the constructors to use recycled concretes and asphalt-concretes, have difficulties to deal with the problem. In this paper, we studied about the law system and researched two phases of the law system: 1) recycling of demolished concretes, 2) the use of recycled concretes. As a result, we find the problems at the use of recycled concretes phase. We pointed out necessity of extending the specified application for recycled concretes and a reform of administrative orders process.