Utilisation a waste of stone processing in production of other kinds products is an actual task for stone-cutting enterprises. In this study, the possibilities of using basalt dust generated during sawing, grinding and polishing of basalt and related minerals in the manufacture with concrete are studied. Three groups were prepared with different content of basalt dust - 0 %, 5 % and 20 %. After the final hardening performance of the concrete, the compressive strength testing was conducted on the specimens. The results showed that the addition (5%) added basalt dust practically did not reduce the strength ratio practically, the increase of basalt dust content up to 20% caused an average 16% reduction in the strength of the specimens. The fracture character that occurred in the specimens containing basalt dust corresponded to the fracture character that happened to similarly shaped concrete products.
Keywords: concrete, stone waste, strength, basalt
The paper describes the regression model of the change in the ice coverage of the White Sea, obtained on the basis of satellite data of NSIDC. Changes in the ice coverage of the White Sea are mathematically described by a polynomial of the 6th degree, the quality of which is characterized by a coefficient of determination of 0.78. On the basis of the obtained mathematical model, the terms and duration of the phases of the ice regime of the White Sea are established, and also the analysis of the rate of formation and destruction of ice formations is given.
Keywords: ice coverage, ice phenomena, regression model, White Sea, satellite data of NSIDC
The paper is devoted to an overview of the methods of ice characteristics of water bodies studies (such as an indicator of the ice cover, the timing and duration of the phases of ice regime). The advantages of the use of multispectral satellite imagery to assess ice conditions of water bodies over the other methods are listed. The difficulties of obtaining data on a particular water body under study are shown. These difficulties appear because of the identification problems of the water body when interpreting satellite images (maps).
Keywords: ice characteristics, water, earth remote sensing, interpretation, multispectral imagery
The article presents the results of the analysis of satellite information on the water surface temperature of the White Sea. Satellite data with a spatial resolution of 0.011°, obtained by the sensors of the satellites Auqa, Terra, NOAA-18, Coriolis and a time step of 1 day are used. With the help of an automated algorithm, a daily series of mean values of water surface temperature values of the White Sea averaged over the water area was formed.
Keywords: Water surface temperature, White Sea, satellites, automated analysis, daily series, spatial resolution
The process of constructing a mathematical model of basin water bodies. Using the raw data, a mathematical model of the basin of Lake Onega. This model can be used for modeling thermal and hydrodynamic processes.
Keywords: parallelization of computations, thermohydrodynamics modeling of water objects, multi-core processors