California Bearing Ratio of class F pond ash of various genesis

Abstract

To study the bearing capacity of pond ash, samples were taken from dumps of a number of power plants in the Russian Federation: Omsk TPP-4, Novocherkasskaya TPP, Serovskaya TPP, Apatitskaya TPP, producing pond of various genesis. All studied materials classified to class F according to ASTM C-618-12. At the first stage of the study, the maximum dry density of soil and the optimum moisture content were determined by the Proctor method (type B mold and type A compaction hammer), the results of which were compared with the results of determining the same parameters by the SoyuzDorNII method (using a large standard compaction device). At the second stage, the Californian bearing ratio (CBR) of all samples of pond ash in a water-unsaturated state at different densities was determined (corresponding to compaction 7, 21 and 56 by blows of a compaction hammer on a layer of pond ash in the a Proctor mold). At the third stage of the study, the deformation modulus of pond ash were determined on samples with optimal moisture content and maximum dry density of soil by the method of oedometer test. Samples were prepared with the using a large standard compaction device of the SoyuzDorNII design. At the end of the study, the results were analyzed and conclusions were drawn about the linear relationship of the parameters (optimal moisture content and maximum dry density) determined by the method of Proctor and SoyuzDorNII, the presence of a correlation between CBR and the compaction coefficient of the PA, and the absence of a statistically significant correlation ( R 2