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Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
AbstractCarbonated autoclaved aerated concretes (AACs) show no shrinkage at a degree of carbonation approximately less than 20%. The 29Si MAS NMR spectrum showed that at a degree of carbonation less than 25%, the typical double-chain silicate anion structure of tobermorite-11Å was well maintained and interlayer Ca ions were exchanged with protons. This corresponded to the absence of carbonation shrinkage at a degree of carbonation less than 20%. When the degree of carbonation increased from 25% to 50% up to 60%, the double-chain silicate anion structure of tobermorite-11Å was decomposed and Ca ions in the Ca–O layers were dissolved, showing a possible mechanism of carbonation shrinkage.
Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
AbstractCarbonated autoclaved aerated concretes (AACs) show no shrinkage at a degree of carbonation approximately less than 20%. The 29Si MAS NMR spectrum showed that at a degree of carbonation less than 25%, the typical double-chain silicate anion structure of tobermorite-11Å was well maintained and interlayer Ca ions were exchanged with protons. This corresponded to the absence of carbonation shrinkage at a degree of carbonation less than 20%. When the degree of carbonation increased from 25% to 50% up to 60%, the double-chain silicate anion structure of tobermorite-11Å was decomposed and Ca ions in the Ca–O layers were dissolved, showing a possible mechanism of carbonation shrinkage.
Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
Matsushita, Fumiaki (Autor:in) / Aono, Yoshimichi (Autor:in) / Shibata, Sumio (Autor:in)
Cement and Concrete Research ; 34 ; 1251-1257
15.12.2003
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
| British Library Online Contents | 2004
Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
| Online Contents | 2004
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