Delayed Ettringite Formation: the case and research progress in Japan

Author(s): S. Hanehara, T. Oyamada and M. Tanimura
Paper category: conference
Book title: Crack Control of Mass Concrete and Related Issues concerning Early-Age of Concrete Structures
Editor(s): F. Toutlemonde and J.-M. Torrenti
Print ISBN: 978-2-35158-125-4
e-ISBN: 978-2-35158-126-1
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 69 - 78
Total Pages: 10
Language: English

Abstract: The cases of expansive deterioration of concrete due to delayed ettringite formation (DEF) and the counter measure of DEF in Japan are described in this paper. There are only three cases reported for DEF in Japan since 2005. Before then, researches for DEF had not been done in Japan. All cases are observed in precast concrete products such as concrete curb, concrete grating and railway products (poles) which were cured under normal pressure steam curing. Also the progresses in researches on DEF are described. The influence of kind of cement, aggregate and sulfate and added amount of sulfate on the expansion of concrete by delayed ettringite formation (DEF). The evaluation method of concrete against DEF is also described.

Online publication: 2012-07-20
Publication Type: full_text
Public price (Euros): 0.00