Geo-material properties of wasted oyster shell-sand mixture and its application as material for sand compaction pile

The recycling, reclamation and material reuse activities become important issues for social responsibilities in recent years and for the future. Construction industry also takes action for its waste, and is requested to reuse the miscellaneous industrial waste, too. Wasted oyster shell makes major environmental pollution in Ishinomaki City, Miyagi prefecture, where oyster harvest is major parts of fishing product. This paper reports the recycling of a huge amount of oyster-shell from fisheries waste, being environmental problem. The report contains geotechnical study and a case record of reusing oyster-shell for soil improvement under the break water at Ishinomaki Port.