RAW MIXTURE FOR BUILDING MATERIAL MAKING Russian patent published in 1996 - IPC

FIELD: building industry. SUBSTANCE: raw mixture has components at the following ratio, wt.-%: clay 77-80; leaning agent 13-15; slime from galvanic production waste treatment 5-10. Slime consists of the following components, wt. -%: Fe₂O₃ 1.3-7.0; CaO 6.0-12.5; Cr₂O₃ 1.0-8.5; CuO 0.2-2.0; Al₂O₃ 6-10; ZnO 0.1-7.0; NiO 0.2-2.0; CdO 0.07-0.1; SiO₂ 8.4-9.5, and CaSO₄•0,5H₂O 5.2-31.0. Mixture can be used for brick making. EFFECT: enhanced exploitation properties: resistance to cold, compression and bending mechanical strength. 2 tbl