METHOD OF MANUFACTURE OF FACING SLABS Russian patent published in 1995 - IPC

FIELD: manufacture of building materials. SUBSTANCE: raw mix of the facing and bedding courses is prepared. Wax lubricant of the following composition is prepared, mass percent: grease - 15; liquid petrolatum - 30; polyethylene wax with a drop temperature above 60 C - 8, ceresin with a drop temperature above 60 C - 9, and white spirit - the rest. Lubricant is applied onto a mould with a smooth bottom, raw mix is placed into the mould in one or two layers, seasoned, subjected to thermal treatment and deformed. To obtain decorative surface, simulating travertine, commercial froth based on saponified wood tar is applied onto some sections of the mould bottom, making up 10 to 15% of its surface, before the raw mix is laid. To obtain decorative surface, simulating shell rock, gas-forming suspension containing, mass percent: aluminium powder - 1 to 5; surface-active agent - 0.01 to 0.005; potash soluble glass with a density of 1.5 g/qu.cm - 1.5; water - the rest, is applied before the raw mix is laid on the mould bottom. EFFECT: facilitated procedure. 3 cl, 2 tbl