To obtain a light-weight form material reducing a concrete construction, by holding a core material between synthetic resin boards and forming voids between the synthetic resin boards by the core material.
A styrene foam board 1 is used for a core material and held by two polypropylene boards 2, 2. And voids 6 are formed between both polypropylene boards by bubbles in the styrene foam board 1. Polypropylene boards 3 are attached also to the side faces of the polypropylene boards 2, 2 forming panel parts. The weight is lightened while keeping the strength higher than a specified value, in this sandwich form. This structure is contributed to the environmental conservation and also it is excellent in peelability and the reusing number is remarkably increased. In this way, form works can be executed at a low cost and the cost of concrete work itself can be decreased.
TOKUTOME KAZUNORI
KIKUNAGA MASAHIRO
| JPH0725144U | 1995-05-12 | |||
| JPH07233630A | 1995-09-05 | |||
| JPH08100523A | 1996-04-16 |
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