Influence of CaO reactivity on the formation of low-base calcium silicate hydrates

• Autorzy: Baltakys K. , Prichockiene E.
• Języki publikacji: EN

Abstrakty

EN

The influence of CaO reactivity on the formation of calcium silicate hydrates in the CaO-SiO2onH2O-H2O system has been determined when the CaO/SiO2molar ratio was equal to 0.83 and 1.0. In a pure CaO-SiO2onH2O-H2O system, with CaO/SiO2 = 0.83, C-S-H (I) is rather stable, and at 175 °C, even after 72 h, only partially recrystallizes into 1.13 nm tobermorite. Meanwhile, in the mixtures with less reactive CaO (96%), the stoichiometric composition (CaO/SiO2) of products of the synthesis varies from 0.66 to 0.83. When the CaO/SiO2 molar ratio in the initial mixture is equal to 1.0, the CaO reactivity has a significant effect on the composition of products forming in hydrothermal conditions. The products of the syntheses were characterized by X-ray diffraction analysis, simultaneous thermal analysis and Fourier transform infrared spectroscopy.

Słowa kluczowe

EN

calcium silicate hydrate; 1.13 nm tobermorite; gyrolite; CaO reactivity

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2010
• Tom: Vol. 28, No. 1
• Strony: 295--304
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Baltakys K.

autor

Prichockiene E.

• Department of Silicate Technology Kaunas University of Technology Radvilenu 19 LT - 50270 Kaunas Lithuania

Bibliografia

• [1] BALANDIS A., JASIUKEVICIUS V., MARTYNAITIS M., STRAZDAS K., The Fundamentals of Silicate Technology, The Institute of Scientific and Encyclopaedic Press, Vilnius, 1995 (in Lithuanian).
• [2] TAYLOR H.F.W., Cement Chemistry, Academic Press, San Diego, 1997.
• [3] MARTUSEVICIUS M., KAMINSKAS R., MITUZAS J., The Chemical Technology of Binding Materials, Technology, Kaunas, 2002 (in Lithuanian).
• [4] MARTUSEVICIUS M., Nonhydraulic Hydrated Binders, Technology, Kaunas, 1993 (in Lithuanian).
• [5] TAYLOR H.F.W., Hydrothermal reactions in the system and autoclaved treatment of the products of cement and cement silicates, Press of Constructional Literature, 4th National Congress of Cement Chemistry, Washington, 15 (1973), pp. 385–406 (in Russian).
• [6] TAYLOR H.F.W., ROY D.M., Structure and composition of hydrates, Proc. 7th Int. Symposium on the Chemistry of Cement, Paris, 1 (1980), pp. 112/1–112/3.
• [7] MOSTAFA N.Y., KISHAR E.A., ABO-EL-ENEIN S.A., J. Alloys Comp., 1–2 (2009), 538.
• [8] HEDDLE M.F., Mineral. Mag., 30 (1954), 293.
• [9] MERLINO S., BONACCORSI E., ARMBRUSTER T., Am. Mineral., 84 (1999), 1613.
• [10] MERLINO S., BONACCORSI E., ARMBRUSTER T., Eur. J. Mineral., 12 (2000), 411.
• [11] MERLINO S., BONACCORSI E., ARMBRUSTER T., Eur. J. Mineral., 13 (2001), 577.K. BALTAKYS, 304 E. PRICHOCKIENE
• [12] BUT YU.М., RASHKOVICH L.N., The Hardening of Binding Materials at Higher Temperatures, Constructional Press, Мoscow, 1965 (in Russian).
• [13] NOCUŃ-WCZELIK W., Cem. Concr. Res., 29 (1999), 1759.
• [14] FLINT E.P., MCMURDIE H.F., WELLS L.S., J. Res. Natl. Bur. Stand., 21 (1938), 617.
• [15] MACKAY A.L., TAYLOR H.F.W., Mineral Mag., 30 (1953), 80.
• [16] STEVULA L., HARMAN M., HORVATH I., PUTYERA K., Ceramics – Silikaty, 34 (1990), 315.
• [17] JAUBERTHIE R., TEMIMI M., LAQUERBE M., Cem. Concr. Res., 26 (1996), 1335.
• [18] SHAW S., HENDERSON C.M.B., CLARK S.M., Am. Mineral., 87 (2002), 533.
• [19] SIAUCIUNAS R., BALTAKYS K., Cem. Concr. Res., 34 (2004), 2029.
• [20] BALTAKYS K., SIAUCIUNAS R., BALTUSNIKAS A., Chemical Technology, Kaunas, 1 (2004), 45.
• [21] GUNDLACH H., Dampfgehartete Baustoffe, Bauverlag GmbH, Wiesbaden, 1973 (in German).
• [22] SIAUCIUNAS R., BALTAKYS K., BALTUSNIKAS A., The Instrumental Analysis of Silicate Materials, Vitae Litera, Kaunas, 2007 (in Lithuanian).