Aerated concrete process

Details Aerated concrete process Aerated concrete process

1976-07-07

1978-11-07

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 51, 264 86, 264160, 264333, 264336, 264338, 264DIG43, B28B 114

Patent

active

041246691

ABSTRACT:
The invention provides a process of producing lightweight concrete units, which may or may not be reinforced, which comprises making a mix including cementitious material, fine and, optionally, coarse aggregate, water and material for aerating the mix, preferably aluminium powder and alkali; inserting the mix into a mould and allowing the mix to set into a block in the mould; stripping the mould, and autoclaving the block. In this process, in accordance with the invention, the mix is inserted into the mould before the aeration of the mix is completed and without completely filling the mould, the mould is provided with a closure which allows gas but not solids to escape, and the mix is allowed to expand to fill the mould and set under pressure produced by its own aeration.

REFERENCES:
patent: 3026652 (1962-03-01), Helmerson
patent: 3236925 (1966-02-01), Urmston
patent: 3397260 (1968-08-01), Lamberton

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