CLAY PHOSPHATE MATERIAL Russian patent published in 2007 - IPC C04B28/34 C04B111/20 

FIELD: manufacture of building materials; manufacture of building blocks.

SUBSTANCE: proposed clay phosphate material contains loam, iron-containing waste of metallurgical process at residue on sieve No. 008 containing oxide of Fe (II) 7-11 mass-%, ortho-phosphoric acid at density of 1.24-1.25 g/cm³ ; it additionally contains waste of crystalline silicon production process of the following composition, mass-%: SiO₂, 90.0-94.0; Fe₂O₃, 1-3; CaO, 0.7-1.4; MgO, 0.2-0.4; Na₂O+K₂O, 0.1-0.5; Al₂O₃, 0.7-1.5; SO₂, up to 0.09; SiC, up to 3 at the following ratio of components, mass-%: loam, 60-63; iron-containing waste of crystalline silicon production process, 10-15; the remainder being ortho-phosphoric acid at density of 1.24-1.25.

EFFECT: enhanced strength at retained waterproofness.

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