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Supplementary Cementitious Materials for Concrete: Characterization Needs

Published online by Cambridge University Press:  22 November 2012

Maria Juenger
Affiliation:
University of Texas at Austin, U.S.A.
John L. Provis
Affiliation:
University of Sheffield, United Kingdom
Jan Elsen
Affiliation:
Katholieke Universiteit Leuven, Belgium
Winnie Matthes
Affiliation:
Holcim Group Support Ltd., Switzerland
R. Doug Hooton
Affiliation:
University of Toronto, Canada
Josée Duchesne
Affiliation:
Université Laval, Canada
Luc Courard
Affiliation:
Université de Liège, Belgium
Huan He
Affiliation:
Université de Liège, Belgium
Frédéric Michel
Affiliation:
Université de Liège, Belgium
Ruben Snellings
Affiliation:
École Polytechnique Fédérale de Lausanne, Switzerland
Nele De Belie
Affiliation:
Universiteit Gent, Belgium
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Abstract

A wide variety of materials are currently used as supplementary cementitious materials (SCMs) for concrete, including natural materials and byproducts from various industries. Historically, natural SCMs, mostly derived from volcanic deposits, were common in concrete. In recent years, the dominant SCMs have been industrial by-products such as fly ash, ground granulated blast furnace slag (GGBFS), and silica fume. There is currently a resurgence of research into historic and natural SCMs, as well as other alternative SCMs for many reasons. The primary benefits of SCM use in improvement of long-term mechanical performance, durability, and sustainability are widely accepted, so local demand for these materials can exceed supply. This paper describes some of the SCMs that are attracting attention in the global research community and the properties and characteristics of these materials that affect their performance. Special attention is paid to the importance and demands of material characterization. Many SCMs do not necessarily lend themselves to characterization methods used in standardized test methods, which sometimes fail to describe the properties that are most important in predicting reactivity.

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