About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Bogdanov Ruslan Ravil’evich assistant E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Ibragimov Ruslan Abdirashitovich candidate of technical sciences, аssoсiаtе рrofеssor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 Korolev Evgeny Valer’evich doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it NRU Moscow State University of Civil Engineering The organization address: 129337, Russia, Moscow, Yaroslavskoe shosse, 26 |
| Title of the article | Optimization of the fractional composition of the aggregate mixture for self-compacting concrete |
| Abstract. | Problem statement. The aim of the study was to determine the optimal fractional composition of aggregates for self-compacting concrete, provided that the maximum bulk density and particle packing density were achieved. Results. The main results of the study are to determine the fractional composition of aggregates for self-compacting concrete, designed for waterproofing flat roofs. To solve the formulated problem, mathematical methods of planning an active experiment were used, namely, a simplex-lattice plan. It was found that the mixture has the maximum bulk density, consisting of: coarse aggregate (crushed stone) fraction 5-10 mm – 48 %; enriched fine aggregate (coarse sand) of a fraction of 0,16-5 mm – 16 %; fine aggregate (fine sand) fractions of 0,16-0,63 mm – 36 %. In this case, the maximum bulk density and packing density of the particles of the aggregate mixture were 1840 kg/m3 and 0,82, respectively. Conclusions. The significance of the results of the work for building materials science lies in the expansion of ideas about the formation of dense packaging for the considered recipe system, characterized by its own physical (material and geometric) parameters, as well as in establishing a relationship that demonstrates the local advantages of the simultaneous use of both continuous and discontinuous granulometry. The significance of the results of the work for the construction industry lies in establishing the optimal ratio of the mixture of aggregates, which allows to obtain self-compacting concrete with high physical and technical properties. |
| Keywords. | self-compacting concrete, fractional composition, mathematical design of the experiment, packing density, bulk density, simplex-lattice plan, aggregate. |
| For citations: | Bogdanov R.R., Ibragimov R.A., Korolev E.V. Optimization of the fractional composition of the aggregate mixture for self-compacting concrete // Izvestiya KGASU. 2019. №4(50) P.327-335. |
