Influence of addition of Al compound and gypsum on tobermorite formation in autoclaved aerated concrete studied by in situ X-ray diffraction
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1
Construction Materials Laboratory, Asahi-KASEI Construction Materials Corporation, Japan
 
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Analysis and Simulation Center, Asahi-KASEI Corporation, Japan
 
 
Publication date: 2011-12-01
 
 
Cement Wapno Beton (Special 2011 16) 3-6 (2011)
 
KEYWORDS
ABSTRACT
The hydrothermal formation of tobermorite during the processing of autoclaved aerated concrete was investigated by in situ XRD analysis. The XRD measurement is carried out using high-energy X-rays from a synchrotron radiation source. The effects of Al and gypsum addition on tobermorite formation were studied. Acceleration of tobermorite formation by Al and gypsum addition was clearly observed. The tobermorite formation mechanisms were discussed in these systems.
ACKNOWLEDGEMENTS
This study was performed with the approval of JASRI (Proposal Nos. 2008B1864, 2008B2031 and 2009B1788).
 
REFERENCES (8)
1.
Avrami M., 1939, Kinetics of phase change. I, J. Chem. Phys, 7, 1103-1112.
 
2.
Brown P.W., Pommersheim J., Frohnsdorff G., 1985, A kinetic model for the hydration of tricalcium silicate, Cem. Concr. Res., 15, 35-41.
 
3.
Hancock J.D., Sharp J.H., 1972, Method of comparing solid-state kinetic data and its application to the decomposition of kaolinite, brucite, and BaCO3, J. Am. Ceram. Soc., 55, 74-77.
 
4.
Kikuma J., Tsunashima M., Ishikawa T., Matsuno S., Ogawa A., Matsui K., Sato M., 2009. Hydrothermal formation of tobermorite studied by in-situ X-ray diffraction under autoclave condition, J. Synchrotron Rad., 16, 683-686.
 
5.
Kikuma J., Tsunashima M., Ishikawa T., Matsuno S., Ogawa A., Matsui K., Sato M., 2010. In-situ time-resolved X-ray diffraction of tobermorite formation process under autoclave condition, J. Am. Ceram. Soc., 93, 2667-2674.
 
6.
Larosa-Thompson J.L., Grutzeck M.W., 1996. C-S-H, tobermorite, and coexisting phases in the system CaO-Al2O3-SiO2-H2O, World Cement, 27, 69-74.
 
7.
Mitsuda, T., Sasaki K., Ishida H., 1992. Phase evolution during autoclaving process of aerated concrete, J. Am. Ceram. Soc., 75, 1858-1863.
 
8.
Sakiyama M., Oshio Y., Mitsuda T., 2000, Infl uence of gypsum on the hydrothermal reaction of lime-quartz system and on the strength of autoclaved calcium silicate product, J. Soc. Inorganic Mater. Jpn., 7, 685-691.
 
ISSN:1425-8129
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