Problem of homogeneity of natural aggregates

Natural aggregates are characterized by considerable variability in their technical properties/sand, silt and clay fractions. The statistical estimation of the homogeneity of domestic natural aggregates was carried out at the Institute of Technology and Organization of Building Production in Warsaw Technical University. Total number of results amounted two thousand. A calculation has been made by EMC “Odra 204” for a program in algoritmic language Algol. Equations derived permit the forecast with 95% probability of the compressive strength of Portland—cement concrete on the basis of the variability of features of the aggregates.