| 摘要 |
PROBLEM TO BE SOLVED: To prevent holes from being formed in the surface of a slab on the upper part of a void mold. SOLUTION: In the void mold 10 formed in a flat spherical shape by a synthetic resin foam molded product, multiple stages of recessed parts 11 or projected parts 12 are formed on the surface thereof all the periphery in the lateral direction. The void molds 10 are disposed in a space held by upper side main reinforcements 1 and lower side main reinforcements 2 arranged in lattice shape in the slab S at predetermined intervals in the vertical and lateral directions along the surface direction of the slab S. By this, when a concrete 7 is deposited, air adhered to the void mold 10 or air present in the void mold is held in an adsorbed state to the recessed parts 11 or the projected parts 12 so as not to be separated. Then, air bubbles do not rise up to the surface of the concrete 7 and holes 6 are not produced. When the void mold 10 is formed of the synthetic resin foam molded product, usually bubble adsorption and holding effect to that surface cannot be expected since the surface is formed of a smooth surface. However, by forming the recessed parts 11 or the projected parts 12 for air bubble adsorption, its effect can be largely increased. COPYRIGHT: (C)2007,JPO&INPIT
|
