| 摘要 |
FIELD: investigating or analyzing materials. ^ SUBSTANCE: method includes filling the unit volume, 1 m3, with coarse and fine fractions in layers and determining mean sizes of grains of coarse fraction, d1, and fine fraction, d2, the volume of the coarse fraction, V1, and fine fraction, V2, required for the preparation of the unite volume of mixture, and the value of hollowness of the coarse fraction, Vn1, which is the ratio of the volume of hollows to the volume of the fraction. When the value of d2/d1 exceeds 0.155, the extent of hollowness of the coarse fraction with fine one, U, is calculated from the formula U=(V1+V2-1)(V1Vn1). ^ EFFECT: enhanced accuracy of determining. |
