Process for producing reinforced concrete building units, especi

Details Process for producing reinforced concrete building units, especi Process for producing reinforced concrete building units, especi

1974-03-14

1978-06-06

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Treatment of material by vibrating, jarring, or agitating...

By reciprocating or vibrating mold

52223R, 264228, 264250, 264275, 264299, B28B 108

Patent

active

040936899

ABSTRACT:
A process for producing reinforced concrete building units such as concrete floor panels having coffer-like inner holes with smooth upper and lower surfaces, comprises providing a layer of reinforced concrete on the lower edges of a building unit comprised by an upper panel and joining ribs intersecting each other. A reinforcing steel mat is secured to the lower edges of the ribs which is then immersed in a layer of concrete resting on a plate. The assembly is vibrated to consolidate the concrete around the mat and after hardening, the plate is removed, leaving a smooth undersurface on the resulting hollow construction. The panel can be prestressed to a downwardly convex shape, in which case the plate is given a corresponding upwardly concave curvature.

REFERENCES:
patent: 2039398 (1936-05-01), Dye
patent: 2465871 (1949-03-01), Hardie et al.
patent: 2892339 (1959-06-01), Flower et al.
patent: 3088187 (1963-05-01), Jastice
patent: 3388452 (1968-06-01), Connolly
patent: 3475529 (1969-10-01), Lacy

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