AbstractAbout AuthorsReferences
Results of the influence of artificially synthesized micro-disperse additives of crystalline hydrates on the basis of calcium sulfoaluminetes on the properties of cement stone are presented. The efficiency of using the rotary-pulsation apparatus (RPA) as an activator-homogenizer for obtaining micro-disperse additives is revealed. The possibility of accelerating the hardening of cement stone by means of introducing micro-disperse additives in its composition is shown. It is established that in the presence of micro-disperse additives of crystalline hydrates in cement stone, the phase composition of hydrate new formations changes in the direction of increasing the amount of calcium hydro-silicates. This fact is confirmed by increasing the degree of cement hydration, the amount of bound water in all periods of stone hardening. It is proposed to use micro-disperse additives, which play the role of seeds for crystallization of ettringite and calcium hydro-silicates, for increasing the strength of cement stone at early stages of hardening.
Yu.R. KRIVOBORODOV, Doctor of Sciences (Engineering),
A.A. ELENOVA, Specialist (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.A. ELENOVA, Specialist (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Dmitry Mendeleev University of Chemical Technology of Russia (20, Geroev Panfilovtsev Street, 125480 Moscow, Russian Federation)
1. Patent RF 2332388. Vysokoprochnyi beton [Highstrength concrete]. Svatovskaya L.B., Solov’eva V.A., Stepanova I.V., Sycheva A.N., Korobov N.V., Starchukov D.S.; Declared 11.12.2006. Published 27.08.08. Bulletin No. 24. (In Russian).
2. Usherov-Marshak A.V. Evaluation of the effect of chemical and mineral admixtures on the early stages of cement hydration. Neorganicheskie materialy. 2004. No. 8 (40), pp. 1014–1019. (In Russian).
3. Kramar L.Ya., Trofimov B.Ya., Gamalii E.A., Chernykh T.N., Zimich V.V. Modifikatory tsementnykh betonov i rastvorov (tekhnicheskie kharakteristiki i mekhanizm deistviya) [Modifiers cement concrete and grout (technical characteristics and mechanism of action] Chelyabinsk: Iskra Profi, 2012. 202 p.
4. Kurdovskii V.S. Khimiya сementa i betona [Cement and concrete chemistry] Krakov: Assotsiatsiya Proizvoditelei Tsementa. 2010. 728 р. (In Russian).
5. Lyudvig Kh.-M., Dressel’ D. Synthetic calcium hydrosilicates in precast concrete structures. Mezhdunarodnoe betonnoe proizvodstvo. 2011. No. 5, pp. 42–46. (In Russian).
6. Talero R., Rahhal V. Influence of «aluminic» pozzolans, quartz and gypsum additives on Portland cement hydration. Proceedings of the 12th International Congress on the Chemistry of Cement. Montreal. 2007, pp. 22–35.
7. Scrivener K.L., Nonat A. Hydration of cementitious materials – present and future. Cement and Concrete Research. 2011. V.41. No. 7, pp. 641–650.
8. Dmitriev A.M., Kuznetsova T.V., Yudovich B.E., Zapol’skii A.K. Alloying hydration of cement. Сement. 1983. No. 11, pp. 4–6. (In Russian).
9. Kouznetsova T.V., Krivoborodov Y.R., Samchenko S.V., Burlov I.Y. Special cements on base sulphoaluminate clinker. 13th International Congress on the Chemistry of Cement (ICCC). Madrid, Spain, 2011, pp. 198.1–198.6.
10. Samchenko S.V., Zorin D.A., Borisenkova I.V. Influence of dispersion aluminous slag and sulfoaluminate clinker the formation of structure cement stone. Tekhnika i tekhnologiya silikatov. 2011. No. 2 (8), pp. 12–14. (In Russian).
11. Guvalov A.A., Abbasova S.I., Kuznetsova T.V. Improved high-strength concrete structure using modifiers. Stroitel’nye materialy [Construction Materials]. 2015. No. 12, pp. 78–81. (In Russian).
2. Usherov-Marshak A.V. Evaluation of the effect of chemical and mineral admixtures on the early stages of cement hydration. Neorganicheskie materialy. 2004. No. 8 (40), pp. 1014–1019. (In Russian).
3. Kramar L.Ya., Trofimov B.Ya., Gamalii E.A., Chernykh T.N., Zimich V.V. Modifikatory tsementnykh betonov i rastvorov (tekhnicheskie kharakteristiki i mekhanizm deistviya) [Modifiers cement concrete and grout (technical characteristics and mechanism of action] Chelyabinsk: Iskra Profi, 2012. 202 p.
4. Kurdovskii V.S. Khimiya сementa i betona [Cement and concrete chemistry] Krakov: Assotsiatsiya Proizvoditelei Tsementa. 2010. 728 р. (In Russian).
5. Lyudvig Kh.-M., Dressel’ D. Synthetic calcium hydrosilicates in precast concrete structures. Mezhdunarodnoe betonnoe proizvodstvo. 2011. No. 5, pp. 42–46. (In Russian).
6. Talero R., Rahhal V. Influence of «aluminic» pozzolans, quartz and gypsum additives on Portland cement hydration. Proceedings of the 12th International Congress on the Chemistry of Cement. Montreal. 2007, pp. 22–35.
7. Scrivener K.L., Nonat A. Hydration of cementitious materials – present and future. Cement and Concrete Research. 2011. V.41. No. 7, pp. 641–650.
8. Dmitriev A.M., Kuznetsova T.V., Yudovich B.E., Zapol’skii A.K. Alloying hydration of cement. Сement. 1983. No. 11, pp. 4–6. (In Russian).
9. Kouznetsova T.V., Krivoborodov Y.R., Samchenko S.V., Burlov I.Y. Special cements on base sulphoaluminate clinker. 13th International Congress on the Chemistry of Cement (ICCC). Madrid, Spain, 2011, pp. 198.1–198.6.
10. Samchenko S.V., Zorin D.A., Borisenkova I.V. Influence of dispersion aluminous slag and sulfoaluminate clinker the formation of structure cement stone. Tekhnika i tekhnologiya silikatov. 2011. No. 2 (8), pp. 12–14. (In Russian).
11. Guvalov A.A., Abbasova S.I., Kuznetsova T.V. Improved high-strength concrete structure using modifiers. Stroitel’nye materialy [Construction Materials]. 2015. No. 12, pp. 78–81. (In Russian).
For citation: