Abstract
In order to using scallop shells of a fishery by-product effectively for the back-fill material of aquay, we investigated the internal friction angle of the sand mixed crashed scallop shells by consolidated-drained tri-axial compression test. The following conclusion can be obtained from this study. When the maximum grain size of crashed shell and the rate of shell mixture decreased, the mass of unit volume and the internal friction angle increased, and it turns out that the crush of shell itselfdecreased. It has checked that the sand mixed crashed scallop shells is applicable to back-fill material to some extent.
