PURPOSE: To surely fill a joint part with concrete, by using light-weight concrete which is high in fluidity and hard to segregate as first layer concrete which is placed on decorative finish material and ferrite based molded object, and using ordinary light-weight concrete as second layer concrete which is placed on the first layer.
CONSTITUTION: Gaps 4 of decorative finish material 1 are formed as large as possible. In order to place joint concrete as much as possible in the gaps 4, they are formed rather thick. In order to improve fluidity of concrete just after it is placed, and completely fill every corner of the gaps 4 with concrete, the inside surface of the gap 4 is rounded. Concrete is divided into first layer concrete and second layer concrete. The first layer concrete is placed on the decorative finish material 1 and ferrite based molded object 2. The second layer concrete is placed on the first layer concrete. Light-weight concrete of high fluidity is used as the first layer, and ordinary light-weight concrete is used as the second layer.
NAITO TADAO
KANEKO YOSHIYUKI
KOBAYASHI MIKIO
AIBA SHINNOSUKE
MURAI YASUHIKO
MASUKAWA HIROSHI
OGAWARA TAKEFUMI
YAMAMOTO SHINJI
NIHON CEMENT