Abstract
On March 11 in 2011, a very big earthquake occurred in Tohoku district in Japan. Huge tsunami was generated by this earthquake. Many houses were destroyed by tsunami and a large amount of rubble was generated. At the same time, a large amount of tsunami sludge deposited on land. If the high quality ground materials and cover soils can be produced from waste woods and tsunami sludge, it can be considered that the restoration and reconstruction in the disaster areas will progress greatly. In this study, the mixtures of wood chips and tsunami sludge were modified by Fiber-cement-stabilized soil method, and the strength characteristics of modified soils were experimentally investigated. Furthermore, durability for drying and wetting were investigated in order to use the modified soils as cover soils for radiological contaminated excavated soils in Fukushima Prefecture. It was found through the experiments that modified soils have enough failure strength, failure strain and durability for drying and wetting, and can be used as ground materials or cover soils.
