An investigation of the carbonation of cement paste using trimethylsilylation

Autor:	Andrew Dunster
Rok vydání:	1989
Předmět:	Cement Materials science Calcium hydroxide Carbonation Mineralogy Building and Construction Silicate Amorphous solid chemistry.chemical_compound Calcium carbonate chemistry Chemical engineering Carbon dioxide General Materials Science Calcium silicate hydrate
Zdroj:	Advances in Cement Research. 2:99-106
ISSN:	1751-7605 0951-7197
Popis:	Ground samples of hydrated cement paste were exposed to atmospheric carbon dioxide and the progress of reaction was monitored by trimethylsilylation of the silicate phases and differential thermal gravimetry (DTG) for calcium hydroxide. The data indicate that carbonation for calcium silicate hydrate (CSH) proceeds via high molecular weight intermediates to give an amorphous hydrous silica material. The carbonation of CSH and calcium hydroxide occurs simultaneously, but a residue of calcium hydroxide carbonates more slowly. This is consistent with a rate-determining stage controlled by the rate of diffusion of carbon dioxide through calcium hydroxide crystals coated with calcium carbonate, and hence also by crystal size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cf4746f99ccddf55556f536a96c4d6bf https://doi.org/10.1680/adcr.1989.2.7.99 Zobrazit plný text záznamu