GB239765A - Improvements in building construction - Google Patents

Abstract

239,765. Pope, H. E. Dec. 29, 1924. Casing and moulding in situ; building- materials, special.-Buildings are cast in situ from a slag of relatively low melting temperature by running the melted material into metal or other non-combustible moulds. The moulds may be water-jacketed to reduce the temperature quickly, but if a smooth face is required the mould may be heated prior to the casting. Broken brick, stone, or other matrix may be used and should the slag be of a higher specific gravity than the filling material, lighter granulated materials which will remain in the finished product as a mechanical mixture may be mixed with the slag, or readily volatile substances such as carbonate or sulphate of lime, and carbonate of ammonia, which give off or produce gases at moderate temperatures, may be placed in the ladle before the slag is run in. By this means the slag will contain bubbles and its specific gravity will be reduced. The moulds may be faced with sand or decorations to produce effects on finished surfaces. Metal reinforcement may be used'. The slag may be of such materials as to produce a body approximating to glass for use where windows and lights are required. A suitable slag would be 35 parts of ferrous oxide, 40 parts of sand, 15 parts of carbonate of lime, and 10 parts of carbonate of soda. The ferrous oxide may be replaced by ferric or manganic oxides or metallic silicates, or omitted where translucent effects are desired.