STONE FOUNDING Russian patent published in 1994 - IPC

FIELD: building material. SUBSTANCE: stone founding containing SiO₂, Al₂O₃, CaO, MgO, FeO, Fe₂O₃, MnO, Fe₂O₃ has additionally Fe₃C at the following ratio of components, wt.-%: SiO₂ 56-58; Al₂O₃ 10.8-12.5; CaO 6-7; MgO 1.7-2.5; FeO 1.8-2.2; Fe₂O₃ 4.8-5.2; MnO 6.0-7.7; Fe₂O₃ 1.5-1.9, and Fe₃C 4.0-4.8. EFFECT: enhanced thermal stability and wear resistance, prolonged period of exploitation of articles made of stone founding. 1 tbl