Reactivity and Function of Magnesium Oxide in Sorel Cement
Publication: Journal of Materials in Civil Engineering
Volume 20, Issue 3
Abstract
The reactivity, or rate of consumption, of magnesium oxide powder used in forming magnesium oxychloride (MOC) cement is largely affected by its thermal history and particle size. That, in turn, influences both reaction rate and properties of the reaction products of MOC cement. It is believed that the traditional measurements of properties of powder itself are not able to reflect the actual consumption rate of during chemical reaction, which is the key information needed for the appropriate proportions of starting materials to ensure the formation of Phase 5 crystals for better strength and physical properties. The experimental results show that X-ray diffractograms and phase diagram of a ternary MOC system can be utilized to evaluate the reactivity of , and to optimize the formulation of MOC cement as well. Consequently, the apparent molar ratios of over magnesium chloride are adopted and recommended. The equivalent weight ratios between and are also given for the convenience of normal applications.
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Acknowledgments
The partial financial support from Hong Kong Research Grants Council (RGC) Grant 616706 is greatly acknowledged. Special thanks are also due to Christine Cheung for conscientious assistance in the X-ray measurement and analysis.
References
Bensted, J., and Barnes, P. (2002). Structure and performance of cements, 2nd Ed., E & FN Spon, London, 532–536.
Bilinski, H., Matkovic, B., Mazuravic, C., and Zunic, T. A. (1984). “The formation of magnesium oxychloride phases in the system of and .” J. Am. Ceram. Soc., 67(4), 266–269.
Cole, W. F., and Demediuk, T. (1955). “X-ray, thermal, and dehydration studies on magnesium oxychloride.” Aust. J. Chem., 8(6), 234–251.
Coleman, D. S., and Ford, W. F. (1964). “The effect of crystallite size and microporosity on the hydration of magnesia.” Trans. Br. Ceram. Soc., 63(7), 365–372.
de Henau, P., and Dupas, M. (1976). “Study of the alternation in acropolis monuments.” Proc. 2nd Int. Symp. on the Deterioration of Building Stone, National Technical Univ., Athens, 319–325.
Demediuk, T., Cole, W. F., and Heuber, H. V. (1955). “Studies of magnesium and calcium oxychlorides.” Aust. J. Chem., 8(2), 215–233.
Deng, D., and Zhang, C. (1999). “The formation mechanism of the hydrate phases in magnesium oxychloride cement.” Cem. Concr. Res., 29(9), 1365–1371.
Eubank, W. R. (1951). “Calcination studies of magnesium oxides.” J. Am. Ceram. Soc., 34(8), 225–229.
Harper, F. C. (1967). “Effect of calcination temperature on the properties of magnesium oxides for use in magnesium oxychloride cements.” J. Appl. Chem., 17, 5–10.
Matkovic, B., Popovic, S., Rogic, V., Zunic, T., and Young, J. F. (1977). “Reaction products in magnesium oxychloride cement pastes system .” J. Am. Ceram. Soc., 60(11–12), 504–507.
Matkovic, B., and Young, J. F. (1973). “Microstructure of magnesium oxychloride cements.” Nature (London), 246, 79–80.
Menetrier-Sorrentino, D., Barret, P., and Saquat, S. (1986). “Investigation in the system and hydration of Sorel cement.” Proc., 8th ICCC, Rio de Janeiro, 339–343.
Sorel, S. (1867). “On a new magnesium cement.” Cogn. Sci., 65, 102–104.
Sorrel, C. A., and Armstrong, C. R. (1976). “Reactions and equilibria in magnesium oxychloride cements.” J. Am. Ceram. Soc., 59(1–2), 51–59.
Tooper, B., and Cartz, L. (1966). “Structure and formation of magnesium oxychloride sorel cements.” Nature (London), 211, 64–66.
Urwongse, L., and Sorrell, C. A. (1980). “The system at .” J. Am. Ceram. Soc., 63(9–10), 501–504.
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© 2008 ASCE.
History
Received: Oct 9, 2006
Accepted: Jul 13, 2007
Published online: Mar 1, 2008
Published in print: Mar 2008
Notes
Note. Associate Editor: Chiara F. Ferraris
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