FIBROCONCRETE MIXTURE Russian patent published in 1998 - IPC

FIELD: building materials. SUBSTANCE: fibroconcrete mixture involving cement M400, mineral fiber (kaolin or basalt fiber), sand and water has additionally polyvinyl alcohol and building gypsum at the following ratio of components, wt. -%: cement M44, 20-25; indicated mineral fiber, 2-4; sand, 50-55; polyvinyl alcohol, 1-2 (by dry residue); building gypsum, 4-6; and water, the balance. Granules of polyvinyl alcohol are dissolved preliminary in water to homogeneous mass at 80-90 C for 50-70 min and solution is cooled to environment air point. Components are mixed in mixer of forced type. EFFECT: improved quality of mixture. 2 tbl