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A Dry Mix for Producing Refractory Foam Concrete

Number of journal: №7-2017
Autors:

Leonovich S.N.
Sviridov D.V.
Belanovich A.L.
Savenko V.P.
Karpushenkov S.A.

DOI: https://doi.org/10.31659/0585-430X-2017-750-7-25-29
AbstractAbout AuthorsReferences
The composition of the dry mix on the basis of a two-component binder (aluminous cement and clay of “Kustikha” deposit), mineral additives (metakaolin, sulfoaluminate modifier RSAM, waste of basalt fiber), foaming agent Ufapore, and accelerating and plasticizing additive “Citrate-T” has been developed. When mixing the mix with water at the water-solid ratio of 0.45–0.7, subsequent mechanical blowing out and hardening of foam mass, refractory foam concretes of 300–650 kg/m3 density (depending on WATER/AGGREGATE (W/A) ratio, compression strength of 0.2–2.5 MPa before heat treatment, are formed. These compositions obtain the initial strength due to the processes of hydration hardening of aluminous cement that provides the formation of porous structure of foam concretes. The final strength of 0.3–3.2 MPA they gain after burning at 1000оC. Due to the processes of solid-phase sin- tering of clay with other components of the dry mix during the heating up to 1000оC, the strength is improved, unlike foam concretes on the basis of Portland cement and aluminous cement. Introduction of the accelerating and plasticizing “Citrate-T” to the dry mix leads to improving rheological properties of the foamed mass and reducing the time of its setting and hardening. The significant role of W/A when producing foam concretes is established: increasing W/A from 0.45 to 0.7 increases the volume of foam mass after blowing out, inhomoge- neity of pores and their sizes that leads to reducing the density of foam concretes and compression strength.
S.N. LEONOVICH1, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
D.V. SVIRIDOV2, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.L. BELANOVICH2, Candidate of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.P. SAVENKO2, Engineer,
S.A. KARPUSHENKOV2, Candidate of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.

1 Belarusian National Technical University (65, Nezavisimosty Avenue, Minsk, 220013, Republic of Belarus) 
2 Belarusian State University (4, Nezavisimosty Avenue, Minsk, 220030, Republic of Belarus)

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For citation: Leonovich S.N., Sviridov D.V., Belanovich A.L., Savenko V.P., Karpushenkov S.A. A dry mix for producing refractory foam concrete. Stroitel’nye Materialy [Construction Materials]. 2017. No. 7, pp. 25–29. DOI: https://doi.org/10.31659/0585-430X-2017-750-7-25-29. (In Russian).


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