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Thermal reactivity of slag cement binders and the response of high strength concretes to in-situ curing conditions

Content Provider	Springer Nature Link
Author	Mak, S. L.
Copyright Year	2000
Abstract	Concretes placed in thick structural elements experimence high hydration temperatures and restricted access to moist curing. This is particularly the case in concretes with relatively high binder contents and low water/binder ratios. Under high temperature curing, thermally reactive binders show significantly enhanced development of early age properties which may be there is currently very little data on either the early age or medium-term properties of concrete subjected to the combined impact of high temperature and restricted moist curing. This is particularly the case for blended cements containing supplementary cementitious materials, in spite of such binders being increasingly specified in all forms of construction. In this paper, the early and medium-term performance of high strength concretes containing blast furnace slag subjected to in-situ curing is described. The thermal reactivity of slag blended cements is evaluated in relation to key early age engineering properties, which in turn were found to develop at substantially different rates. The prediction of early age properties using equivalent age principles is assessed.Des bétons placés dans des éléments de structures épais subissent des températures d'hydratation élevées et un accès limité à une cure humide. Ceci est particulièrement vrai pour les bétons à haute teneur en liant et de faibles rapports eau/liant. Dans des conditions de durcissement à haute température, des liants réagissant à la température font preuve d'un développement accéléré des propriétés au jeune âge, qui pourront être exploitées pour augmenter la vitesse de construction. Cependant, à l'heure actuelle, très peu de données sont disponibles sur les caractéristiques à court ou à moyen terme des bétons soumis à l'effet combiné des fortes températures et d'un durcissement humide limité. Ceci est notamment le cas des ciments composés contenant des éléments pouzzolaniques supplémentaires, malgré la prescription de tels liants dans toute forme de construction. Dans cet article, les performances à court et moyen termes des bétons à haute résistance contenant du laitier de haut fourneau soumis à un durcissement in situ sont décrites. La réactivité thermique de ciments au laitier est évaluée par rapport aux principales propriétés au jeune âge, qui en revanche se développent à des taux très variables. Les prévisions des caractéristiques au jeune âge par l'application des principes de temps équivalent sont également évaluées dans cet article.
Starting Page	29
Ending Page	37
Page Count	9
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	33
Issue Number	1
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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