MANUFACTURING METHOD OF A LOT OF CONCRETE BLOCKS

摘要

PURPOSE: A method for manufacturing a plurality of large size concrete blocks is provided to save the manufacture cost and time of a concrete block by not needing a mold for a lower key groove. CONSTITUTION: A first main body and a first concrete block(100) are manufactured. The first main body has a shape in which a cross section is extended to the top. The first concrete block includes a first upper protruded key. A first upper protruded key is formed to be projected from the upper side of the first main body. A release member is constructed in the upper side of the first concrete block. A secondary body and a second concrete block(200) are manufactured. The secondary body has the same cross section as that of the first main body. The second concrete block includes a second lower key groove. A second lower key groove is concavely formed into the top.