| 摘要 |
A rigid, light-weight, thermoplastic bubble insulation form for cast in situ concrete slabs includes hemispherical void spaces for reduction of concrete volume and thermal insulation characteristics. An upper hemispheric surface provides an integral seating arrangement for wire mesh reinforcement. An under-surface of the form includes spacer nodules for facilitating drainage. The bubble relief form is water impervious for controlling curing of the concrete and further is supplied in modular units adapted for trimming and overlapping spliced connections.
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