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Development of an in situ X-ray diffraction system for hydrothermal reactions and its application to autoclaved aerated concrete formation

Published online by Cambridge University Press:  05 March 2012

J. Kikuma ,
M. Tsunashima ,
T. Ishikawa ,
S. Matsuno ,
A. Ogawa  and
K. Matsui
J. Kikuma*
Affiliation:
Analysis and Simulation Center, Asahi-KASEI Corporation, Shizuoka, Japan
M. Tsunashima
Affiliation:
Analysis and Simulation Center, Asahi-KASEI Corporation, Shizuoka, Japan
T. Ishikawa
Affiliation:
Analysis and Simulation Center, Asahi-KASEI Corporation, Shizuoka, Japan
S. Matsuno
Affiliation:
Analysis and Simulation Center, Asahi-KASEI Corporation, Shizuoka, Japan
A. Ogawa
Affiliation:
Asahi-KASEI Construction Materials Corporation, Ibaraki, Japan
K. Matsui
Affiliation:
Asahi-KASEI Construction Materials Corporation, Ibaraki, Japan
*
a)Author to whom correspondence should be addressed. Electronic mail: kikuma.jb@om.asahi-kasei.co.jp
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Abstract

An in situ time-resolved XRD system for hydrothermal reaction has been developed in order to investigate the phase evolution during autoclave process in autoclaved aerated concrete (AAC) formation. The system includes a novel autoclave cell for transmission XRD with thin beryllium windows, a two-dimensional photon-counting pixel array detector, and uses high energy X-rays from a synchrotron radiation source. The temperature and pressure inside the cell are extremely stable during hydrothermal reaction over the course of several hours. The system was utilized for the formation reaction of AAC. Phase evolution was clearly observed, including several intermediate phases, and detailed information on the structural changes during the hydrothermal reaction were obtained.

Keywords

hydrothermal formationtobermoritesteam pressurereal-time
Type
Technical Articles
Information
Powder Diffraction , Volume 26 , Special Issue 2 , June 2011 , pp. 126 - 128
Copyright
Copyright © Cambridge University Press 2011

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