Building Materials and Products
DOI: http://www.dx.doi.org/10.24866/2227-6858/2021-1-12
Stel'makh S., Shcherban' E., Nazhuev M., Tkach P., Bondarenko E., Dzhamaldinov S.
SERGEI STEL'MAKH, Candidate of Engineering Sciences, Associate Professor,
ORCID: https://orcid.org/0000-0002-0364-5504, sergej.stelmax@mail.ru
EVGENII SHCHERBAN', Candidate of Engineering Sciences, Associate Professor (Corresponding Author),
ResercherID: AAG-6070-2020, ORCID: https://orcid.org/0000-0001-5376-247X,
ScopusID: 57197730793, au-geen@mail.ru
MUKHUMA NAZHUEV, Assistant, ORCID: https://orcid.org/0000-0003-1614-4677, nazhuev17@mail.ru
PAVEL TKACH, Undergraduate, paveltkach98@mail.ru
EVGENII BONDARENKO, Undergraduate, bondar.es@gmail.com
SAIKHAN DZHAMALDINOV, Undergraduate, s.djamaldinov@mail.ru
Don State Technical University
Rostov-on-Don, Russia
Control of the physical and mechanical characteristics of concrete
by varying the height and pitch of technological protrusions
of the clamps of vibrocentrifuging devices
Abstract: To regulate the variatropic structure of centrifuged products, the authors of this article combined the process of centrifugation with vibration. During the experiment, vibrations of the mold were provided with clamps set on the shafts of the installation. The author's experimental setup for creating vibrocentrifuged samples of annular cross-section with a variatropic structure, as well as a method for their manufacture is presented. The technological parameters of vibration, which had the most significant effect on the characteristics of vibrocentrifuged concrete, structures and products made of it, were identified. In the experiments, the height of the technological protrusions of the clamps and the pitch between them were varied. The influence of these factors on the physical and mechanical characteristics of concrete was investigated: density; cube compressive strength; prismatic compressive strength; bending tensile strength; axial tensile strength. Analysis of the results of experimental studies is given and the following physical and mechanical characteristics of vibrocentrifuged concretes made using clamps have been obtained: the best ones with a height of technological protrusions of 5 mm and a step between them of 30 mm, the lowest indicator is, respectively, 2.5 mm at any step.
Keywords: vibrocentrifuged concrete, physical and mechanical characteristics, compressive strength, density, concrete mix, centrifugation, flexural strength
Contribution of the authors: the authors contributed equally to this article.
The authors declare no conflicts of interests.
See the reference in English at the end of the article