| Autor: |
Kikuma J; Analysis and Simulation Center, Asahi-KASEI Corporation, Japan. kikuma.jb@om.asahi-kasei.co.jp, Tsunashima M, Ishikawa T, Matsuno SY, Ogawa A, Matsui K, Sato M |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of synchrotron radiation [J Synchrotron Radiat] 2009 Sep; Vol. 16 (Pt 5), pp. 683-6. Date of Electronic Publication: 2009 Jul 02. |
| DOI: |
10.1107/S0909049509022080 |
| Abstrakt: |
Hydrothermal formation of tobermorite from a pre-cured cake has been investigated by transmission X-ray diffraction (XRD) using high-energy X-rays from a synchrotron radiation source in combination with a newly designed autoclave cell. The autoclave cell has a large and thin beryllium window for wide-angle X-ray diffraction; nevertheless, it withstands a steam pressure of more than 1.2 MPa, which enables in situ XRD measurements in a temperature range of 373 to 463 K under a saturated steam pressure. Formation and/or decomposition of several components has been successfully observed during 7.5 h of reaction time. From the intensity changes of the intermediate materials, namely non-crystalline C-S-H and hydroxylellestadite, two pathways for tobermorite formation have been confirmed. Thus, the newly developed autoclave cell can be used for the analyses of reaction mechanisms under specific atmospheres and temperatures. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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