METHOD FOR DETERMINATION OF FINE AND COARSE CONCRETE MIX AGGREGATE INPUTS Russian patent published in 1994 - IPC

FIELD: construction. SUBSTANCE: method for determination of fine and coarse aggregate inputs for concrete mix with a cement binder includes steps of determination of the bulk and average density in a sample batch of the fine and coarse aggregate; determination of the coefficient of grain parting in the coarse aggregate by the mix; determination of the hollowness factor for the coarse aggregate; drying the fine aggregate sample batch; screening the sample batches on the standard set of screens; preliminary determination of fine and coarse aggregate inputs; correction thereof; determination of operational fine and coarse aggregate inputs. The method is characterized in that additionally is determined the content of the coarse aggregate in the fine aggregate and of the fine aggregate grains in the coarse aggregate. Then the preliminary coarse aggregate input and the fine aggregate in the coarse aggregate input are determined. The the preliminary coarse and fine aggregate inputs are determined from a dependence presented in the description. EFFECT: improved accuracy of input determination.