✦ LIBER ✦

On the origin of portland cement setting

✍ Scribed by Y. Chen; I. Odler

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 758 KB
Volume: 22
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(92)90042-t

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✦ Synopsis

On 16 cement pastes made from cements of different clinker composition and containing different amounts and forms of calcium sulfate the composition was determined at the beginning and end of setting. It appears that in cements of "normal" composition the setting is associated mainly with the hydration of C3S and formation of CSH. The formation of ettringite plays a significant role only m cements with exeptionally high C3A contents. A recrystallization of fine ettringite into well developed crystals at the time of setting could not be confirmed in pastes with w/c of at least up to 0.50.

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