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Ettringite needed in gaps?



Title: Ettringite needed in gaps?
Author(s): V. Johansen, B. Osbæck
Paper category : conference
Book title: International RILEM Workshop on Internal Sulfate Attack and Delayed Ettringite Formation
Editor(s): K. Scrivener and J. Skalny
Print-ISBN: 2-912143-44-6
e-ISBN: 2912143802
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 173 - 177
Total Pages: 5
Nb references: 6
Language: English


Abstract: Mortar bars in which part of the sand was replaced by gypsum of similar size expanded more than 10% over 6.5 years as result of internal sulfate attack. The microstructure developed showed empty gaps around the sand particles. This is an experimental demonstration of: gaps created by paste expansion; and that the ettringite usually observed in such locations in mortars expanding as result of heat curing is secondary, re-crystallizing in available space.


Online publication: 2002-09-07
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143802.012