Patent ID: 8579248

Claim:
A kit for forming a concrete structure, said kit comprising: a shaped container having a dry concrete powder mixture packaged therein in an amount sufficient to form said concrete structure; said shaped container including a fluid impermeable bottom portion of a predetermined shape that corresponds with the shape of a concrete structure to be produced and a fluid permeable cover affixed to said fluid impermeable bottom portion; said fluid permeable cover allowing water to be added to said dry concrete powder mixture in said container to form a slurry within said shaped container upon the addition of the water whereby the concrete structure hardens and forms therein; whereby said concrete structure is produced within said shaped container, which may be removed from said concrete structure upon hardening; wherein said fluid permeable covering includes a chemical additive selected from the group consisting of a dye, an accelerant or a water reducing agent, so that when water passes therethrough, the chemical additive dissolves in water and becomes mixed with said slurry.