✦ LIBER ✦

The effect of seawater on the hydration of high MgO cements

✍ Scribed by V. Kasselouris; Ch. Ftikos; J. Economou

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 248 KB
Volume: 20
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(90)90110-j

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✦ Synopsis

This investigation concerns the effect of some ions, contained in seawater, on the hydration of cements containing 7% MgO, pure or with 30% pozzolan (Santorin Earth). Pastes prepared from these two cements were cured in five baths containing seawater, deionized water and aq. solutions of S042-, Mg 2+ and C1-ions respectively for one year. The Mg(OH)~ produced during the hydration of the above cements was determined by DTA-TG, while thehyd~ation phenomena were studied by XRD. It is concluded that the presence of C1-and SO4 z-ions does not affect MgO hydration. Mg 2+ ions increase the Mg(OH)~ content, mostly by their penetration in the pastes. The beneficial effect of the interground pozz-olan is also shown.

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