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. | Makarenko Sergey Viktorovich candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Lazovskiy Boris Mihailovich postgraduate student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Irkutsk National Research Technical University The organization address: 664074, Russia, Irkutsk, Lermontov st., 83 Khokhryakov Oleg Viktorovich candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Khozin Vadim Grigorievich doctor of technical sciences, professor 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 |
| Title of the article | The effect of active pozzolanic fillers on the properties of fine-grained cement concrete |
| Abstract. | Problem statement. The work aimed to study a method for increasing the strength of fine-grained (sandy) concrete with the combined use of active pozzolanic fillers of natural and technogenic origin in its composition. Results. The results of the combined effect of fly ash and metakaolin on the technological and physical-mechanical parameters of fine-grained (sandy) cement concrete (cone spread, air content and density of the concrete mixture, bending and compressive strength) are presented. By the method of mathematical planning of the experiment, regression equations for the mobility and strength of concrete are derived, and the contribution of each filler to the kinetics of its hardening is estimated. The reliability of the results of the work is justified by calculating the confidence interval and homogeneity of variances using Cochrans criteria, as well as checking the model for adequacy taking into account the Fisher coefficients. Conclusions. The significance of positive results for construction lies in the possibility of using active fillers of both technogenic and natural origin. It is shown that metakaolin makes the greatest contribution to the kinetics of hardening at an early age (up to 7 days), and fly ash at the later hardening periods (28 days). Thanks to their combined use, it is possible to obtain high-strength fine-grained concrete with a compressive strength of over 100 MPa. |
| Keywords. | fine-grained high-strength concrete, metakaolin, dump-ash, strength. |
| For citations: | Makarenko S.V., Lazovskiy B.M., Khokhryakov O.V., Khozin V.G. The effect of active pozzolanic fillers on the properties of fine-grained cement concrete // Izvestiya KGASU. 2020. №3(53) P.39-46. |
