Abstract
The quality of concrete has been investigated empirically, when three kinds of waste melting incinerator slag, direct-arc, fluidized bed gasification and coke bed type is used as pulverized aggregate. It has become clear that bending strength and freeze-thaw of Iterlocking Block that contains slag stay within the normal range, if the ratio of slag substituted for sand is around 10%. There is no evidence of efflux of heavy-metal ion, such as Cu, Cd, Se, Ag, etc., from slag and the Iterlocking Block.
