Simulation of cement-ash stone for wells
| Autor: | V. M. Orlovskyi, V. S. Biletskyi, A. V. Melezhyk |
|---|---|
| Jazyk: | English<br />Russian<br />Ukrainian |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Мінеральні ресурси України, Iss 4, Pp 41-45 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1682-721X 2707-8698 |
| DOI: | 10.31996/mru.2021.4.41-45 |
| Popis: | Purpose. The purpose of this work is to obtain a statistical mathematical model of cement-ash stone with the response function – the strength of the stone. In particular, the task is to establish the effect on the strength of cement stone additives in the form of ash-removal of thermal power plants (pozzolanic additive). Methodology. A rotatable central composition plan of the experiment was used to obtain a statistical model. The results were processed using the method of computer mathematical modeling using the system STATGRAPHICS Plus for Windows. Originality. It is established that the hypersurface G (X₁, X₂) has an extremum point, which allows to optimize the composition of the cement mixture by factors X₁, X₂. Practical value. The results obtained in this work make it possible to predict the strength characteristics of the stone on the basis of cement-ash composition. Finding. The statistical mathematical model of cement-ash stone on the basis of cement of general construction purpose of the ПЦI-500-Н brand is received. From the obtained pareto-graphs, hypersurfaces and contour curves, the nature and degree of influence of each of the polynomial members on the objective function – the strength of cement stone G (X₁, X₂, X₃) are determined. The factors of model X₁, X₃ have the greatest statistical significance, the factor X₂ is statically the least significant. The simulation results confirm that the water-mixture ratio does not have a significant effect on the strength of cement stone in a given range of formulations. The maximum strength of cement stone G = 13,582 MPa takes place at the optimum point with coordinates: Х₁ = 0,689; Х₂ = −0,295; Х₃ = 1,105. |
| Databáze: | Directory of Open Access Journals |
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