METHOD OF MAKING BRICK, BLOCK, FACING PLATE, PLATE FOR INTERNAL WALL FACING Russian patent published in 1997 - IPC

FIELD: building materials. SUBSTANCE: method involves simultaneous mixing and milling sand, sandy loam or ash or their mixture (up to particle size less 640 mcm) with addition of dry alkaline metal carbonate at amount 4-10% of dry forming mixture mass followed by forming article at moisture 3-10%, drying and roasting at 760-900 C. Properties: brick sort - 100, not less, hardiness - 35 cycles, not less, heat conductivity - 0.65 Wt/mc, not above, water absorption - 15%, not above. EFFECT: improved method of making. 2 tbl