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The mechanism of hardening and hydration of white Portland cement admixed with salicylaldehyde

✍ Scribed by A.M. Dunster; D.ap. Kendrick; J.R. Parsonage

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 372 KB
Volume: 24
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(94)90143-0

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✦ Synopsis

White Portland cement, (a cement containing less than 0.3% iron oxide), reacts rapidly with salicylaldehyde (2-hydroxybenzaldehyde), causing rapid setting and hardening in the absence of added water. One of the reaction products was identified as a calcium complex of salicylaldehyde (CHOC6HsO)zCa. Trimethylsilylation of the White Portland cement (wpc) showed that the polymerisation degree of the silicate anions in the cement was unaffected by the salicylaldehyde. A study of the rate of subsequent hydration in the prescence of additional water indicated that the hydration of the wpc was retarded by the calcium complex.

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