PHOSPHATE CLAY MATERIAL Russian patent published in 2009 - IPC C04B28/34 C04B111/20 

FIELD: construction.

SUBSTANCE: phosphate clay material including loam, iron-containing metallurgical waste including Fe (II) oxide, with sieve residue of 7-11 wt % on sieve № 008, orthophosphoric acid of 1.24-1.25 g/cm³ density, and additionally includes tailings of iron ore dressing with sieve residue of 7-10% on sieve № 008, including, wt %: Fe₂O₃-4.35, FeO-2.11, Fe²⁺-0.203; SiO₂-42.0, CaO-20.15, MgO-14.06, Al₂O₃-6.21, MnO-0.051, TiO₂-0.404, P⁵⁺-0.183, S-0.284, at the mollowing component ratio, wt %: loam - 60-65, indicated iron-containing waste - 6-8, indicated tailings of iron ore dressing - 10-15, the rest is orthophosphoric acid of 1.24-1.25 g/cm³ density.

EFFECT: enhanced durability of phosphate clay material without impairing water resistance.

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