Abstract
In this research, the design method in order to apply mud improvement effect by granulated coal ash (GCA) to the field is proposed. Organic matter content of mud in Fukuyama cove is more than 20%, and water content of surface mud is more than 1000%. In addition, scum floating on the water emanate bad smell, special phenomenon not found in other seas occurs in Fukuyama cove. It is confirmed that scum has many organic matters with fatty acid and its density is smaller than ordinary mud of sea bottom. And it is estimated from field observation that the generation area of scum is around the mouth of the cannel. Sinking thickness in scattering with GCA depends on not only water content but also rheological characteristics on mud. From this result the method from liquid and plastic limit test to estimate the sinking thickness is proposed.
