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In situ time-resolved X-ray diffraction of tobermorite formation process under hydrothermal condition: Influence of reactive al compound

  • K. Matsui (a1), A. Ogawa (a1), J. Kikuma (a2), M. Tsunashima (a2), T. Ishikawa (a2) and S. Matsuno (a2)...

Abstract

Hydrothermal formation reaction of tobermorite in the autoclaved aerated concrete (AAC) process has been investigated by in situ X-ray diffraction. High-energy X-rays from a synchrotron radiation source in combination with a newly developed autoclave cell and a photon-counting pixel array detector were used. XRD measurements were conducted in a temperature range 100–190°C throughout 12 h of reaction time with a time interval of 4.25 min under a saturated steam pressure. To clarify the tobermorite formation mechanism in the AAC process, the effect of Al addition on the tobermorite formation reaction was studied. As intermediate phases, non-crystalline calcium silicate hydrate (C-S-H), hydroxylellestadite (HE), and katoite (KA) were clearly observed. Consequently, it was confirmed that there were two reaction pathways via C-S-H and KA in the tobermorite formation reaction of Al containing system. In addition, detailed information on the structural changes during the hydrothermal reaction was obtained.

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Corresponding author

a)Author to whom correspondence should be addressed. Electronic mail: matsui.kj@om.asahi-kasei.co.jp

References

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Grutzeck, M. W. (2005). in Cellular Ceramics, edited by Scheffler, M. and Colombo, P. (Wiley-VCH, Weinheim), pp. 193223. 10.1002/3527606696.ch2i
Houston, J. H., Maxwell, R. S., and Carroll, S. A. (2009). “Transformation of meta-stable calcium silicate hydrates to tobermorite: Reaction kinetics and molecular structure from XRD and NMR spectroscopy,” Geochem. Trans. GETRF9 10, 1. 10.1186/1467-4866-10-1
Kikuma, J., Tsunashima, M., Ishikawa, T., Matsuno, S., Ogawa, A., Matsui, K., and Sato, M. (2009). “Hydrothermal formation of tobermorite studied by in-situ X-ray diffraction under autoclave condition,” J. Synchrotron Radiat. JSYRES 16, 683686. 10.1107/S0909049509022080
Kikuma, J., Tsunashima, M., Ishikawa, T., Matsuno, S., Ogawa, A., Matsui, K., and Sato, M. (2010). “In situ time-resolved X-ray diffraction of tobermorite formation process under autoclave condition,” J. Am. Ceram. Soc. JACTAW 93, 26672674. 10.1111/j.1551-2916.2010.03815.x
Larosa-Thompson, J. L. and Grutzeck, M. W. (1996). “C-S-H, tobermorite, and coexisting phases in the system CaO–Al2O3–SiO2–H2O,” World Cem. WOCEDR 27, 6974.
Merlino, S., Bonaccorsi, E., and Armbruster, T. (1999). “Tobermorite: Their real structure and order-disorder (OD) character,” Am. Mineral. AMMIAY 84, 16131621.
Mitsuda, T., Sasaki, K., and Ishida, H. (1992). “Phase evolution during autoclaving process of aerated concrete,” J. Am. Ceram. Soc. JACTAW 75, 18581863. 10.1111/j.1151-2916.1992.tb07208.x
Taylor, H. F. W. (1997). Cement Chemistry, 2nd ed. (Thomas Telford, London), pp. 113156. 10.1680/cc.25929

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In situ time-resolved X-ray diffraction of tobermorite formation process under hydrothermal condition: Influence of reactive al compound

  • K. Matsui (a1), A. Ogawa (a1), J. Kikuma (a2), M. Tsunashima (a2), T. Ishikawa (a2) and S. Matsuno (a2)...

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