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ISSN 2227-6858
English version IS Bulletin Archive 2018. N 1/34


Building Materials and Technologies

DOI.org/10.5281/zenodo.1196703

Leonovich S., Sviridov D., Belanovich A., Karpushenkova L., Karpushenkov S., Kim L.

SERGEI LEONOVICH, Doctor of Engineering Sciences, Professor, Dean, Civil Engineering Faculty, e-mail: sleonovich@mail.ru.
Belarusian National Technical University
65 Nezavisimosti Av., Minsk, Republic of Belarus, 220013
DMITRY SVIRIDOV, Doctor of Chemical Sciences, Professor, Dean, Chemistry Faculty, е-mail: sviridov@bsu.by
ANATOLY BELANOVICH, Candidate of Chemical Science, Senior Researcher, e-mail: lab508@mail.ru
LARISA KARPUSHENKOVA, Candidate of Chemical Sciences, Associate Professor, Department of Physical Chemistry, е-mail: karpushenkava@bsu.by
SERGEY KARPUSHENKOV, Candidate of Chemical Sciences, Associate Professor, Department of Inorganic Chemistry, е-mail: karpushenkov@bsu.by
Belarusian State University
14 Leningradskaya St., Minsk, Republic of Belarus, 220030
LEV KIM, Candidate of Technical Sciences, Associate Professor, School of Engineering, e-mail: kim_lvl@dvfu.ru
Far Eastern Federal University
8 Sukhanova St., Vladivostok, Russia, 690091

Features of the formation of the heat-resistant foam concrete

Abstract: The paper presents the prospective fire-resistant foam concrete, characterized by low cost, ecological compatibility, and low density. The use of aluminous cements in the manufacture of foam concrete has a number of disadvantages: low foam stability during the production of foam concrete mixture and insufficient strength of foam concrete. The application of a two-component astringent of aluminous cement and clay is proposed. The optimal composition of a dry mixture based on a bicomponent binder and additives was determined experimentally. The dependences of the influence of the concentration of sodium citrate in the mixing water on the plasticity of the solution and foam concrete slurry and on the time of the beginning and the end of the setting of the mortar cement mix have been obtained. The influence of the composition of binder and mineral additives on the formation and properties of the heat-resistant foam concrete that does not reduce its strength during heating due to solid-phase sintering of clay with other components of the mixture is presented. The optimum composition of the dry mixture based on the two-component binder (alumina cement and clay of the Kustikha deposit of Belarus), mineral additives (chamotte, metakaolin, sulfoaluminate modifier, basalt fiber waste), plasticising additive of sodium citrate, Ufapore foaming agent and water-hard ratio. It has been established that sodium citrate leads to an increase in the rheological properties of foamed foam and a reduction in its setting and solidification time at a water-hard ratio of 0.45–0.70. Recommendations are given for the introduction of the presented fire-resistant foam concrete compositions.

Key words: foam concrete, heat-resistance, dry mix, mineral additive, foamer, accelerating additive, plastifier.

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