Experience in limiting early-age concrete temperature for DEF prevention

Author(s): F. Cussigh
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: 79 - 86
Total Pages: 8
Language: English

Abstract: High temperature concrete curing has always been a concern for concrete construction, first for preventing thermal cracking and more recently to impede delayed ettringite formation. In 2007, French recommendations for DEF prevention have been published with different prevention levels defined with the care of ensuring in the same time a proper control of DEF risks and practical possibilities to use mass concrete in civil engineering projects. This paper describes how early-age concrete temperature has been kept under control on different civil engineering projects during the last 20 years, focusing on recent projects on which precise limits for peak temperature have been included in concrete technical specifications of the construction contract. The use of blended cement (fly ash, blast furnace slag, etc.) has proved to be helpful for allowing at the same time higher peak temperature and reduced heat development. This is a new option for civil engineering concrete (historically CEM I was the preferred option) and technical specifications should be updated to favour that option.

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