B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/121, 25/58
B28B 1/14 (2006.01) B28B 1/44 (2006.01) B28B 7/42 (2006.01) C04B 28/20 (2006.01)
Patent
CA 1164191
ABSTRACT OF THE DISCLOSURE A process and apparatus is provided for the production of calcium silicate-containing stone blanks which are useful in constructing building walls. A crude mixture, of a granulated silicate-containing material, lime, water, a cement and a foaming agent, is subjected to no more than a minimum application of external pressure and is subsequently hardened in an autoclave. The cement produces the necessary strength for the blank, so that the latter becomes trans- portable while the final strength is achieved by reaction of the silicate-con- taining material during the autoclave treatment. In order to arrive at accept- able molding times and in order to achieve a simplified process with slight fragment bulk density and optimal heat damping characteristics, the crude mix- ture is rendered pourable, is filled into molds in a quantity corresponding to the fragment volume of the stone blank, and the crude mixture in the mold is heated essentially uniformly to a temperature between 45°C and 90°C until achiev- ing the desired blank-strength. The production of the blanks is carried out in molds, which are equipped with a heating system for heating the crude mixture in the molds, whereby the heating takes place by means of an electric high fre- quency field and/or indirectly via the molds and possibly via mold spikes, which are individually heatable and serve for the development of a pattern of holes in the stone.
375779
Hermann Volker
Keller Reimund
Pfeifer Hermann
Schubert Peter
Schulz Eckhard H.
Fetherstonhaugh & Co.
Sicowa Verfahrenstechnik Fur Baustoffe G.m.b.h. & Co. Kg
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