Abstract
Utilization of soil fractions recovered from disaster debris as geomaterials was highly desirable after the 2011 East Japan earthquake and tsunami because the soil fraction accounted for a third of the approximately 30 million-ton disaster debris and tsunami deposits. Because the quality of recovered soils varied according to treatment systems at each site, as well as the characteristics of original soils, clarification of material properties of recovered soils is important for future catastrophic disaster. In this paper, generation and treatment of disaster debris are briefly summarized. A total of 404 data items, which were obtained in Iwate Prefecture, were analyzed to verify the properties of the recovered soils in relation to the treatment methods. A series of analyses indicated that the soil fractions recovered from disaster debris have quality equivalent to general geomaterials.
