MECHANICS OF DEFORMABLE SOLIDS

Original article

https://doi.org/10.24866/2227-6858/2024-4/3-17

Puzatova A.V., Dmitrieva M.A., Leitsin V.N.

Anastasiia V. Puzatova, Head Laboratory of Construction Materials, Senior Lecturer of the Educational and Scientific Cluster “Institute of High Technologies”, Immanuel Kant Baltic Federal University (Kaliningrad, Russian Federation), a.v.puzatova@gmail.com, https://orcid.org/0000-0002-3798-4969

Maria A. Dmitrieva – Doctor of Physical and Mathematical Sciences, Professor of the Educational and Scientific Cluster “Institute of High Technologies”, Immanuel Kant Baltic Federal University (Kaliningrad, Russian Federation), ADmitrieva@kantiana.ru, https://orcid.org/0000-0002-9593-8653

Vladimir N. Leitsin – Doctor of Physical and Mathematical Sciences, Professor of the Educational and Scientific Cluster Institute of High Technologies, Immanuel Kant Baltic Federal University (Kaliningrad, Russian Federation), VLeitsin@kantiana.ru, https://orcid.org/0000-0002-6140-256X

Evaluation of the efficiency of mechanical activation of the initial components of cement-based composite material

Abstract. The development of the initial strength of cement-based composite materials, including various methods for studying processes at the early stages of mechanochemical transformations, is currently a relevant subject of research in the field of mechanics of composites. During mechanical activation of the initial components of concrete composites, a change in the state of the substance occurs, as a result of which the reactivity of the activated components increases, which, in turn, leads to an increase in the initial strength of the composite. The aim of this work is to evaluate the efficiency of mechanical activation of components of cement-based composite materials at early stages of strength gain. It was shown that the greatest effect is achieved by mechanical activation of a binary composition of cement and coarse sand fraction. With the developed mode of mechanical activation, the strength of concrete composites at the initial stages increases multiple times. To achieve the results obtained in this work, it is necessary to increase the specific surface area of the original cement-sand composition up to a certain level. The resulting activated cement-sand composition retains its effective properties for a practi-cally significant period of time (up to 3 months) when stored in sealed packaging, and can also be used as the main structure-forming component of a composite material, and as a modifying additive in concrete composites. The results obtained in this work on the assessment of the efficiency of mechanical activation can be used in factories for the production of dry building mixtures when introducing the technology of mechanical activation of initial components.

Keywords:mechanical activation, micromechanics, concrete composite, reactivity, cement, sand, initial strength

See the reference in English at the end of the article

For citation: Puzatova A.V., Dmitrieva M.A., Leitsin V.N. Evaluation of the efficiency of mechanical activation of the initial components of cement-based composite material. FEFU: School of Engineering Bulletin, 2024, no. 4(61), pp. 3–17. (In Russ.)