MIXED SOIL FOR IMPERMEABLE LAYER, AND MIXED SOIL BLENDING DESIGN METHOD

摘要

PROBLEM TO BE SOLVED: To provide a mixed soil for an impermeable layer, which can be simply and inexpensively manufactured, and a blending design method for the mixed soil.SOLUTION: A mixed soil for forming an impermeable layer 2 of an intermediate storage facility 1 for waste containing a radioactive substance is prepared by mixing bentonite with a parent material composed mainly of fragile rock. The parent material is an excavation surplus soil of fragile rock of a rock classification section of classes Cto D having no size control, and the bentonite is mixed at a mixing ratio to a dry weight of the mixed soil within 5% to 10%.