Abstract
It has been confirmed that the tsunami debris from the Northeastern Japan Pacific Offshore Earthquake consists of a massive amount of mud with woodchips, concrete chips and plastic wastes (estimated to be approximately 13–28 million tons) after relatively large-size wreckage had been removed. In some cases, mud contains a mixture of small- and large-size debris. According to Ministry of the Environment’s guideline for the treatment of tsunami deposit from the Great East Japan Earthquake, the priority is to make the best use of what can be effectively utilized; what cannot be utilized should be properly processed. The authors have long been involved in the effective utilization of industrial by-products and the processing of illegally dumped materials, using the Crushing and Diffusive Mixing Technique. In the face of the Great East Japan Earthquake, the authors experimentally processed the actual tsunami deposits from the Earthquake using Crushing and Diffusive Mixing Method, and succeeded in efficiently separating debris from soil with improved contents. This is a report on successful separation of and utilization of improved soil.
