Cellular Slag Portland-Cement Concrete with Lime-Sulfur Sealing Compound

The use of the lime-sulfur sealing compound facilitates activation of slag Portland-cement when producing the cellular concrete of non-autoclaved hardening with aluminum powder or hydrazine. When the aluminum powder is used as a gas developing agent, the high speed of strength gain by 30–40% is determined by the formation of a fast crystallizing phase – thiosulfate-containing hydroaluminates. The introduction of this sealing compound in combination with 1,4% of hydrazine ensures the improvement of strength by 50–70% and the strength-density ration from 0,8–0,9 up to 1,2–1,29 in comparison with haydite concrete mixed with water. Relatively higher technical indicators in experiments with the use hydrazine are due to the full recovery of ion Fe(II) in the iron hydroxide and increase in its concentration in the hardening mass which, in turn, facilitates the fullness of recrystallization of primary calcium hydrosilicates.

G.I. BERDOV¹, Doctor of Sciences (Engineering)
M.A. ELESIN², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
E.V. UMNOVA², Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Novosibirsk State University of Architecture and Civil Engineering (113, Leningradskaya Street, Novosibirsk, 630008, Russian Federation)
² Norilsk Industrial Institute (7, 50 Let Oktyabrya, Norilsk, 663310, Russian Federation)

1. Sakharov G.P., Skorikov E.P. Non-autoclave energy efficient porobeton natural hardening. Izvestiya vuzov. Stroitel’stvo. 2005. No. 7, pp. 49–54. (In Russian).
2. Leont’ev E.N., Kokovin O.A. On the issue of non-autoclaved cellular concrete. Tekhnologiya betonov. 2007. No. 5, pp. 50–52. (In Russian).
3. Aminev G.G. Low-cement not autoclave cellular concrete. Stroitel’nye Materialy [Construction Materials]. 2005. No. 12, pp. 50–51. (In Russian).
4. Salimgareev F.M., Naiman A.N. New approach to manufacturing techniques of wall blocks from cellular concrete. Stroitel’nye Materialy [Construction Materials]. 2002. No. 3, pp. 12–13. (In Russian).
5. Trambovskii V.P. Cellular concrete in modern construction. Tekhnologiya betonov. 2007. No. 2, pp. 30–31. (In Russian).
6. Ezhov V.B. Traditional material on service of modern construction. Stroitel’nye Materialy [Construction Materials]. 2002. No. 4, pp. 24–25. (In Russian).
7. Elesin M.A. Studying of kinetics of dissolution of sulfur in calcium hydroxide. Zhurnal prikladnoi khimii. 1996. Vol. 69, No. 7, pp. 1069–1072. (In Russian).
8. Elesin M.A. Pavlov A.V., Berdov G.I., Mashkin N.A. Research of the mechanism of hydration transformation of a Portland cement in calcium polysulfide solution. Zhurnal prikladnoi khimii. 2002. Vol.75, No. 6, pp. 903–907. (In Russian).
9. Nizamutdinov A.R., Umnova E.V., Botvin’eva I.P., Elesin M.A. Influence of the concentration of sulfur in highly mineralized a mixing liquid on rheological properties and setting times of the concrete mixtures. Perspektivy nauki. 2012. No. 10 (37), pp. 53–57. (In Russian).
10. Mashkin N.A. Elesin M.A., Nizamutdinov A.R., Botvin’eva I.P. Hydrochemical modifying of concrete mixes dilution in lime and sulfur liquor. Izvestiya vuzov. Stroitel’stvo. 2013. No. 6, pp. 16–21. (In Russian).
11. Moskalenko I.G., Elesin M.A. Gas concrete from metallurgy by-products. Collection of scientific works “Resources, Technologies, Market of Construction Materials”. Penza: PGUAiS. 2006. pp. 28–30. (In Russian).