Being the concrete placing facilities manner for the various strength concrete beam floor construction structure which top of concrete placing facilities manner, and

摘要

PROBLEM TO BE SOLVED: To solve the problems due to a construction joint surface of heterogeneous strength concrete in a heterogeneous strength concrete beam/floor structure.;SOLUTION: In a heterogeneous strength concrete beam/floor structure 1, high strength concrete C1 is placed to reach a level lower than an underfloor surface level A, and normal strength concrete C2 is placed before the high strength concrete C1 is hardened. Then, the boundary surface of the high strength concrete C1 and the normal strength concrete C2 is mixed by vibration generation means, and a mixed layer M is formed between them. Thus, the concentration of damages on the sudden change part of a cross section width is prevented. Also, prolonging of a process is evaded without the need of waiting for hardening of the high strength concrete C1, and the invasion of the normal strength concrete C2 to the area of the high strength concrete C1 of a beam 2 is prevented as well.;COPYRIGHT: (C)2012,JPO&INPIT