Omsk, Omsk, Russian Federation
Nowadays, there is a shortage of natural soils of the required quality in many regions of the Russian Federation. Another issue is typical one for the megacities: hundreds of hectares in suburban areas covered by industrial waste dumps, most of which are ash and slag mixtures of coal thermal power plants. The fractionation of the ash and slag mixture during washing in dumps leads to heterogeneity of the grain composition, accounting for which is necessary during the development of man-made soil. To study the heterogeneity in the Section No. 2 of the ash dump TPP-4 in Omsk, we drilled 14 vertical wells and took the samples with disturbed structure from depths of 0.5, 4.5, 8.5 m and 12.5 m. Then, we made the laboratory study of ash and slag materials samples to assess their composition by sieve and areometric methods. According to the study, we define random changing of the man-made soil particle size. Also, the study allows us to identify a statistically significant pattern that can predict the distribution of ash grain size and slag mixtures in the ash dump.
thermal power plants, ash and slag waste and mixtures, man-made soils, grain composition
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