METHOD OF AUTOCLAVELESS MANUFACTURING OF GAS-CONCRETE BUILDING OBJECTS Russian patent published in 1997 - IPC

FIELD: manufacture of building materials. SUBSTANCE: invention is aimed at reducing cost of gas-concrete building objects' production at the expense of reduced number of process operations and using, as shale-ash binder, fly ash from combustion of dust-like Baltic region shale coal. Concrete mix is prepared in mortar mill by mixing following components: shale-ash binder, silica filler (quartz sand or coal ash), and water followed by introducing gas-generating agent and agitation to produce gas-concrete mix. Thereafter objects are molded and hardened by way of hydrothermal treatment in stem- curing chamber with low-pressure steam. EFFECT: reduced production cost. 6 cl