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Extension of the fib MC 2010 for basic and drying shrinkage of alkali‐activated slag concretes

Caron, Richard ORCID iD icon 1; Patel, Ravi A. 1; Dehn, Frank 1
1 Institut für Massivbau und Baustofftechnik (IMB), Karlsruher Institut für Technologie (KIT)

Abstract:

Alkali-activated slag is an alternative to ordinary Portland cement that has been studied for the past 20 years. One of the main challenges for its practical use is understanding and controlling its shrinkage behavior. In this study, new experimental results for two alkali-activated slag concrete mixes are presented under both sealed and unsealed conditions. The results show that basic shrinkage increases with increased sodium silicate ratio. Under unsealed conditions, the age to exposure to drying has a most significant impact on the final drying shrinkage. Finally, the mechanisms explaining shrinkage of such materials are discussed and thefib Model Code 2010 is extended for alkali-activated slag concrete using the new experimental results. The extended model consists of four parameters influencing the final values and the speed of both basic shrinkage and drying shrinkage. It is extensively compared with experimental datasets from the literature and improves significantly predictions compared with the original models for both basic and drying shrinkage. This demonstrates clearly the feasibility to extend it for predicting shrinkage of alkali-activated slag concrete.


Verlagsausgabe §
DOI: 10.5445/IR/1000146543
Veröffentlicht am 21.10.2022
Originalveröffentlichung
DOI: 10.1002/suco.202100901
Scopus
Zitationen: 4
Web of Science
Zitationen: 4
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Massivbau und Baustofftechnik (IMB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1464-4177, 1751-7648
KITopen-ID: 1000146543
Erschienen in Structural Concrete
Verlag Wiley-VCH Verlag
Band 23
Heft 6
Seiten 3960-3973
Vorab online veröffentlicht am 06.05.2022
Nachgewiesen in Scopus
Web of Science
Dimensions
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