Physicochemical properties of limestone calcined clay cement (LC3) concrete made using Saudi clays

Marwan Abdulqader, Hammad R. Khalid*, Mohammed Ibrahim, Saheed K. Adekunle, Mohammed A. Al-Osta, Shamsad Ahmad, Muhammad Sajid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Using calcined clays and limestone powder for clinker substitution to make a tertiary blend, known as limestone calcined clay cement (LC3), is a promising emerging technology. This study explored the viability of using local Saudi clays to prepare LC3 concrete. Two Saudi (white and yellow) and one Ukrainian (for comparison) clays were used for clinker substitution at three levels (i.e., 30%, 50% and 70%). The clay and LC3 samples were characterized using X-ray fluorescence, X-ray diffraction, and thermogravimetric analyses. Paste and concrete specimens were prepared to investigate the phase assemblage, fresh (water demand, setting time, and flowability), and hardened (compressive strength, shrinkage, and chloride ingress) properties. The results revealed that the clays contained about 53%, 30%, and 35% kaolinite, respectively. The incorporation of clays resulted in increased water demand to achieve normal consistency. The setting time of LC3 mixtures also increased, while the flowability decreased compared to the control mixture. The 28-day compressive strength was more than 28 MPa up to 50% clinker substitution. LC3 mixtures also exhibited relatively low shrinkage and high resistance to chloride ingress.

Original languageEnglish
Pages (from-to)2769-2783
Number of pages15
JournalJournal of Materials Research and Technology
Volume25
DOIs
StatePublished - 1 Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 The Authors

Keywords

  • CO reduction
  • Calcined clays
  • Clinker substitution
  • Green cement
  • LC
  • Limestone
  • Supplementary cementitious materials (SCMs)

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

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