CRACK JOINT FORMING IMPLEMENT AND JOINT FORMING METHOD FOR CONCRETE SLAB

摘要

PROBLEM TO BE SOLVED: To provide a crack joint forming implement and a joint forming method for a concrete slab that can easily form a crack joint in the concrete slab of an earthen floor or the like without taking time for construction.;SOLUTION: The crack joint forming implement 1 is a crack causing implement embedded in the concrete slab 20 to cause a crack 23 in the concrete slab 20. The crack joint forming implement 1 includes: a wedge-shaped hardware 2 arranged pointing toward the surface side of the concrete slab 20; a receiving implement 3 supporting the wedge-shaped hardware 2 movably to the surface side of the concrete slab 20; and an expansion material 4 interposed between the bottom face of the wedge-shaped hardware 2 and the receiving implement 3 and expanded with moisture or components contained in concrete.;COPYRIGHT: (C)2011,JPO&INPIT