METHOD OF DETERMINING EXTENT OF DENSIFYING COARSE-GRAINED FRACTIONS WITH FINE-GRAINED ONES Russian patent published in 2004 - IPC

FIELD: testing materials.

SUBSTANCE: method includes filling the unit volume of coarse-grained fractions with fine-grained fractions in layers, determining the mean sizes of grains of the coarse fraction d₁ and fine fraction d₂, d₂/d₁, mass of the coarse and fine fractions required for the preparation of a unit volume of mixture, volume mass and density of the coarse fraction, and volume mass of the fine fraction. When d₂/d₁ exceeds 0.155 the densifying extent of the coarse fraction by fine fraction is determined from the formula , where U is the dimensionless extent of densifying of the coarse-grained fraction with the fine-grained fraction, M₁ is the mass of the coarse-grained fraction required for preparing a unit volume of mixture, kg/l, is the volume mass of the coarse-grained fraction, kg/l, is the density of the grains of coarse fraction, kg/l, M₂ is the mass of fine fraction required for the preparation of the unit volume of the mixture, kg/l, is the volume mass of the fine fraction, kg/l.

EFFECT: enhanced accuracy.

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