Delayed ettringite formation in massive concrete structures: an account of some studies of degraded bridges

Title: Delayed ettringite formation in massive concrete structures: an account of some studies of degraded bridges
Author(s): L. Divet, A. Pavoine
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: 98 - 126
Total Pages: 29
Nb references: 25
Language: English

Abstract: Some concrete structures exhibit cracking which is sometimes attributed to expansion caused by delayed ettringite formation. A study of materials in service shows that this pathology does not only occur in heat-treated concrete but also in mass concrete structures. In the latter, the thermal cycle appears to be more intense in view of the length of time high temperatures are maintained. Several parameters seem essential for the reaction to take place: the cement content must be high ; concreting must take place during the summer, the cement must be of the appropriate type (in terms of alkali, SO3 and C3A content), humidity must be high and the aggregate must have certain mineralogical characteristics.

Online publication: 2002-09-07
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143802.007