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EFFECT OF HIGH TEMPERATURE AT EARLY AGE ON INTERFACIAL TRANSITION ZONE AND MATERIAL PROPERTIES OF CONCRETE



Author(s): Shingo Asamoto (1), Ryosuke Yuguchi (1), Isao Kurashige (2), Pang-Jo Chun (3)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 683-688
Total Pages: 6
Language : English


Abstract: In this study, we investigated the damage risk at interfacial transition zone of concrete exposed to 65°C at early age assuming steam curing and the influence of the damage on material properties of concrete such as dynamic elastic modulus, permeability and shrinkage. When the concrete was exposed to the high temperature at early age, the dynamic elastic modulus was reduced and air permeability was increased comparing to concrete without high temperature history. The modulus reduction and permeability increase of the concrete subjected to 65°C with ground granulated blast furnace slag were larger than those of the concrete without the slag. It can be attributed to larger coefficient of thermal expansion and larger shrinkage of cement paste with the slag to form microcracks around the aggregate. The impregnated fluorescent resin also indicated more microcracks in concrete having the slag when 65°C was induced at early age. Although it is reported that the drying shrinkage was generally reduced after curing at high temperature, the drying shrinkage of concrete with the slag was increased when the concrete was cured in water after 65°C exposure and then dried.


Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00


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