Abstract
Using construction sludge, which is considered to be inadequately recycled, as an example, this report summarizes the issues involved in promoting the utilization of recycled sludge and presents methods for expanding its use. In-situ use of construction sludge is progressing because it is economically advantageous under the right construction conditions, but the use of recycled products between construction projects and through recycling facilities has not progressed sufficiently due to institutional restrictions as well as economic efficiency and confidence in quality. The "Construction Sludge Recycled Products Certification System" is a system to certify that the construction sludge is recycled and used as valuable resources, as indicated in the Ministry of the Environment's July 2020 notice, The certification system for recycled construction sludge, which was notified by the Ministry of the Environment in July 2020, will enable the treatment of recycled construction sludge as valuable resources at the manufacturing stage if certain conditions such as quality and certainty of use are met, thereby promoting the utilization of recycled construction sludge in a systematic and economical manner. If both the certification system for valuables and the certification system for recycling (individual designation) are applied to shield construction projects and other construction projects that generate large amounts of construction sludge, the application for individual designation will be sufficient for the construction companies alone, and the recycling and utilization of construction sludge will be efficiently and dramatically promoted. It is expected that the certification system for valuable materials will be expanded to include tile chips and other items with similar problems.
