Study on Recycling of Tsunami Sludge Deposited on the Bottom of Rivers as Banking Materials

Abstract

On March 11, 2011, a very big earthquake occurred in the Tohoku district in Japan. Huge tsunami was generated by this earthquake and the coastal area of the Tohoku district had catastrophic damage. A large amount of tsunami sludge deposited on the bottom of many rivers. As a result, many rivers do not satisfy the planned flow cross sectional area. Furthermore, many banks had a serious damage by this earthquake and tsunami. Therefore it is urgently necessary to reinforce the bank, but it needs a large amount of soils. If the high quality banking materials can be produced from the tsunami sludge, the effective construction will be possible. However, the tsunami sludge do not have enough function as banking materials because the durability is extremely small. In this study, we focused on the application of the fiber-cementstabilized soil method to banking materials. The characteristics of Fiber-cement-stabilized soil made of tsunami sludge deposited in the river as banking materials were experimentally investigated.