DRY MIX FOR MANUFACTURE OF NON-AUTOCLAVE AERATED CONCRETE AND A PROCESS FOR PREPARING IT Russian patent published in 2007 - IPC C04B38/02 B28B1/50 

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to fabrication of products from cellular concrete and can be applied at cellular concrete product plants and in cast-in-place construction for filling canals and hollows in masonries as well as for manufacturing heat-retaining slabs. Dry mix additionally containing textile cord is composed of, wt %: Portland cement 40.1-45.8, lime 8.1-9.2, ground sand 41.3-48.0, textile cord 3.5-8.5, and aluminum powder 0.210-0.214. In a non-autoclave aerated concrete manufacturing process including preparing raw mix, molding paste, and ageing, preparing raw mix is accomplished through jointly grinding ground sand and aluminum powder on ball mill followed by adding cement, lime, and textile cord to the mill and performing additional grinding. Thus obtained dry aerated concrete mix is charged into mixer, mixed with ashes, and allowed to stand until complete swelling is attained. Resulting mix is poured to required hollow.

EFFECT: simplified process, expanded technological possibilities, and improved performance characteristics of concrete.

8 cl, 1 tbl