RAW MATERIAL FOR MANUFACTURE OF CERAMIC ARTICLES Russian patent published in 2000 - IPC

FIELD: raw materials for manufacture of building articles; manufacture of structural clay products, mainly brick and facing structural clay tiles. SUBSTANCE: raw material contains glauconite-containing sands used as technological mineral additional of the following mineral composition, mass-%: glauconite-containing clay material, 28 to 33; feldspar, 2 to 5; calcite, 1 to 5; apatite, 3 to 6 and quarts remainder at the following ratio of components, mass-%: easily fusible clay, 90 to 95 and glauconite- containing sands, 5 to 10. EFFECT: enhanced compressive strength; reduced burning temperature. 3 tbl