Abstract
Clay slurry has been used for various purpose in construction works of port and harbour, such as back-filling of revetments or cut-off layer covering sand seabed for off-shore waste disposal sites. For these uses, the large unit weight of clay slurry is desirable. The mixing the slurry with gravel or steel slug is a probable way for increase the unit weight of clay slurry. In this study, the time-settlement property of single solid in clay slurry was investigated by the laboratory test. The stability condition of single solid is given as a safety factor of bearing capacity of clay layer. The proposed safet factor was related to the results of experiment on serigration of clay-slug mixtures.
