RAW MATERIAL FOR MANUFACTURE OF SAWDUST CONCRETE BLOCKS Russian patent published in 1995 - IPC

FIELD: manufacture of building materials. SUBSTANCE: raw material for manufacture of saw- dust concrete blocks includes, mas.part. wood-particle aggregate 50-55; mineral aggregate 16-20; portland cement 20-25; water 4-10; potassium 4- chloro-2,3,5,6-fluorophenolate 0.05-0.10. Mixture may contain up to 4 mas. part. of gypsum. Wood-particle aggregate is used in form of sawdust, chips, bark. Mineral aggregate is used in form of sand, gravel, cinder wastes of thermoelectric plants, and boilers. Addition of potassium 4-chloro-2,3,5,6-fluorophenolate ensures resistance of finished products to mold fungi and makes them practically incombustible. Blocks made of offered mixture feature good heat insulation and are easily workable. Mixture is prepared from readily available raw materials. Manufacture process of blocks is simple and needs no complicated equipment. EFFECT: higher efficiency. 2 cl, 1 tbl