SAND COARSENESS MODULUS DETERMINATION METHOD AND DEVICE DESIGNED TO REALIZE IT Russian patent published in 1994 - IPC

FIELD: building industry. SUBSTANCE: novelty consists in that uniformly distributed ascending flow of working fluid is formed in classification chamber. The flow provides for the qualitative division of initial mixture. The mass of precipitated fraction is weighed in the working fluid. The fraction consecutive precipitation is performed by changing the flow rate of the working fluid beginning with coarser particles of sand. To form a uniformly distributed flow, a converging tube is joined to the lower part of the classification chamber. The converging tube is arranged in the flow formation chamber filled with the working fluid. EFFECT: more efficient check of the building material quality. 2 cl, 1 dwg