New issues - Известия Казанского государственного архитектурно-строительного университета.

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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Andrey Yu. Belyakov, post-graduate student, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Oleg V. Khokhryakov, doctor of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Vadim G. Khozin, doctor of technical sciences, professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Title of the articleFunctionalized mineral filler is an effective modifier for cement concrete
Abstract.Mineral fillers and surfactants (plasticizers) make it possible to regulate the rheological properties of concrete mixtures, increase the physical and mechanical properties of concrete, and also reduce the consumption of cement in them. However, the most common method remains the introduction of chemical additives into the composition of concrete mixtures with mixing water, and the use of mineral fillers (pozzolanic, hydraulic, inert) in practice is less common. An alternative to the separate use of plasticizers (and other chemical additives) and fillers can be the forced “fixation” of the former on the surface of mineral particles when they are ground together. Functionalized fillers obtained in this way can be used as modifying additives in cement concrete, superior in efficiency to known organomineral additives. The article examines the effect of functionalization of mineral fillers of various chemical nature with superplasticizers on the mobility of cement-mineral suspensions and concrete mixtures, and on the physical and mechanical properties of heavy concrete. The purpose of the study is to obtain functionalized fillers that provide increased efficiency of superplasticizers in concrete mixtures. To achieve the goal, the following tasks were set: 1. To establish the maximum effective concentrations of superplasticizers in cement-water suspensions; 2. To determine the mobility of cement-mineral suspensions and justify the effectiveness of using functionalized fillers; 3. To investigate the particle size distribution in functionalized fillers; 4. To study the effect of functionalization of fillers on the water requirement of concrete mixtures and the strength of concrete. Results. A method for increasing the efficiency of superplasticizers in mineral-water suspensions by functionalizing mineral fillers has been substantiated. In heavy cement concrete, the method can significantly improve the technological and physical-mechanical properties. Conclusions. The significance of the results obtained for the construction industry is to increase the strength properties of concrete using functionalized fillers obtained from isoplastic concrete mixtures, which allows reducing the consumption of Portland cement without reducing the physical and mechanical properties of concrete.
Keywords.functionalized filler, superplasticizer, plasticizing ability, cement concrete, concrete modifier
For citations:Belyakov A.Yu., Khokhryakov O.V., Khozin V.G. Functionalized mineral filler is an effective modifier for cement concrete // News KSUAE, 2023, № 3(65), p.45-56, DOI: 10.52409/20731523_2023_3_45, EDN: FCPOKY


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