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Hydration and mixture design of calcined clay blended cements: review by the RILEM TC 282-CCL

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

DOI

  • Franco Zunino, Swiss Federal Institute of Technology Lausanne
  • ,
  • Yuvaraj Dhandapani, University of Leeds
  • ,
  • Mohsen Ben Haha, Heidelberg Cement AG
  • ,
  • Jørgen Skibsted
  • Shiju Joseph, KU Leuven
  • ,
  • Sreejith Krishnan, Indian Institute of Technology, Delhi
  • ,
  • Anuj Parashar, Oregon State University
  • ,
  • Maria C.G. Juenger, University of Texas at Austin
  • ,
  • Theodore Hanein, University of Sheffield
  • ,
  • Susan A. Bernal, University of Leeds
  • ,
  • Karen L. Scrivener, Swiss Federal Institute of Technology Lausanne
  • ,
  • François Avet, VICAT

The RILEM technical committee 282-CCL: Calcined Clays as Supplementary Cementitious Materials, investigates all the aspects related to calcined clays, from clay exploration and characterization to calcination process, hydration reactions and concrete properties. This white paper focuses on the hydration mechanisms of calcined clay-blended Portland cements, covering both 1:1 and 2:1 calcined clays. The pozzolanic reaction of calcined clay is detailed, and the main reaction products are described. The differences observed depending on the clay type are also discussed, as well as the potential influence of the secondary phases present in calcined clay. The factors controlling and limiting the reaction of calcined clay are investigated, evidencing the role of porosity saturation and refinement of the microstructure. The complete characterisation of the hydration of calcined clay cements is made possible by the determination of the reaction degree of calcined clay. Several methods are compared to estimate the extent of calcined clay reaction. The influence of clinker and limestone mineralogy are also discussed. Finally, guidelines for optimising the mixture design of calcined clay blended cements are provided, with special attention to sulphate adjustment and clinker factor.

OriginalsprogEngelsk
Artikelnummer234
TidsskriftMaterials and Structures/Materiaux et Constructions
Vol/bind55
Nummer9
ISSN1359-5997
DOI
StatusUdgivet - nov. 2022

Bibliografisk note

Funding Information:
Open access funding provided by EPFL Lausanne. F. Zunino and K. Scrivener acknowledge the financial support provided by the Swiss Agency of Development and Cooperation (SDC), grant 81026665. Participation of T. Hanein was funded by UKRI through a Future Leaders Fellowship (MR/V023829/1) and through the Circular Economy Centre for Mineral-based Construction Materials (EP/V011820/1). Participation of Y. Dhandapani was sponsored by the National Science Foundation (NSF) through award 1903457 and the UK Engineering and Physical Sciences Research Council (EPSRC) through grant EP/R001642/1.

Publisher Copyright:
© 2022, The Author(s).

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