METHOD OF PRODUCING SILICATE BRICK Russian patent published in 2024 - IPC C04B28/18 

FIELD: construction.

SUBSTANCE: invention relates to the industry of construction materials, particularly to production of silicate bricks. Method of producing silicate brick involves mixing initial components, moistening, holding in a sealed chamber, moulding at pressure of 20 MPa, heat and moisture treatment at temperature of 95±5 °C, wherein initially an active mineral additive is obtained by separate grinding of 55 wt.% of sandy pelite-silt rock and 45 wt.% of chalk to specific surface area of 300 m²/kg, their mixing, annealing at 1,000 °C for 3 hours, grinding to specific surface area of 500 m²/kg; mixing of quicklime with specific surface area of 600 m²/kg, sandy pelitic-silt rock with specific surface area of 1,000 m²/kg, sandy pelite-silt rock with specific surface area of 80–110 m²/kg and moistening of the obtained mixture, holding in a sealed chamber until complete slaking of lime; mixing obtained mixture with active mineral additive, additional moistening to moulding moisture content of 10–12%, holding moulded raw brick in a sealed chamber for 2 hours, heat-and-moisture treatment (HMT) in a steaming chamber according to mode of 1.6+6+1.5 hours, with the following ratio of components, wt.%: ground unslaked lime 5–10; sandy pelite-silt rock with specific surface area of 1,000 m²/kg 10–20; active mineral additive 5–10; sandy pelite-silt rock with specific surface area of 80–110 m²/kg is the rest.

EFFECT: reduced time of heat and moisture treatment, increased strength of raw brick with high quality of finished product.

1 cl, 5 tbl