Evaluation of the Influence of Prescription Factors on the Structure Formation of Polymer-Organic Binder

Number of journal: 9-2020
Autors:

Sokolova Yu.V.,
Ayzenshtadt A.M.,
Korolev E.V.,
Chibisov A.A.

DOI: https://doi.org/10.31659/0585-430X-2020-784-9-27-36
УДК: 691.342

 

AbstractAbout AuthorsReferences
The development of the Northern and Arctic regions is hindered by unfavorable engineering and geological conditions. Therefore, an urgent task is to introduce innovative technologies in construction that improve the physical and mechanical properties of dispersed soils. There are various ways to strengthen and stabilize soils, but the most widely used are combined physical and chemical methods that make it possible to create structures with specified performance characteristics by the type of soil concrete. Preliminary studies have shown the effectiveness of using an additive based on glyoxal to strengthen aluminosilicate (sandy and clay) soils of road bases and utilities. The developed composition on the basis of sand, saponite-containing material, glyoxal and fine bark, based on the studied mechanism of topochemical interaction between the components, can be considered as a model of soil-concrete based on a polymer-organic binder. The non-traditional binder is a system of mechanically activated bark – glyoxal, and the filler is a mixture of polymineral sand and saponite-containing material, characterized by quantitative variation of the latter and providing the creation of a model system of clay soil with a given number of plasticity. However, there is currently no assessment of the contribution of the main parameters of topochemical interaction to the structure-forming properties of the polymer-organic binder, and the influence of prescription and technological factors on the properties of the final composite is not determined. The purpose of the study presented in this paper was to test a scientifically based methodology for assessing the influence of chemical and physico-chemical factors on the structure formation of a polymer-organic binder, to identify the maximum possible synergistic effect and to determine the ranges of variation in the content of components. To characterize the influence of the chemical factor, the amount of glyoxal was chosen, expressed in terms of the ratio of the polarization component of the surface tension of the Cora-glyoxal system after completion of the polycondensation reaction, determined by the Ounce-Wendt-Rabel - Kjellble method to the initial concentration of glyoxal; for the physico-chemical factor, the number of active centers, expressed in terms of the specific surface area of the mechanoactivated bark. The compressive strength of the composite and its moisture resistance, characterized by a conditional softening coefficient, were chosen as structurally sensitive properties. The dependences of the influence of prescription and technological factors on the properties of the final composite are established. The compressive strength is most affected by the physical and chemical factor, and the moisture resistance is most affected by the chemical factor. The principles of controlling the processes of polymer-organic binder structure formation are developed. Obtaining soil concrete with the required strength characteristics should be carried out by controlling the specific surface area of the mechanically activated bark; and achieving a given degree of moisture resistance – by varying the concentration of glyoxal.
Yu.V. SOKOLOVA1, Engineer (Assistant) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.M. AYZENSHTADT1, Doctor of Sciences (Chemistry), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
E.V. KOROLEV2, Doctor of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.A. CHIBISOV1, Master student (This email address is being protected from spambots. You need JavaScript enabled to view it.)

1 Northern (Arctic) Federal University named after M.V. Lomonosov (17, Severnaya Dvina Embankment, Arkhangelsk, 163002, Russian Federation)
2 St. Petersburg State University of Architecture and Civil Engineering (4, 2-nd Krasnoarmeyskaya Street, St. Petersburg, 190005, Russian Federation)

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For citation: Sokolova Yu.V., Ayzenshtadt A.M., Korolev E.V., Chibisov A.A. Evaluation of the influence of prescription factors on the structure formation of polymer-organic binder. Stroitel’nye Materialy [Construction Materials]. 2020. No. 9, pp. 27–36. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2020-784-9-27-36


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