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August 8, 2026Journal of Advanced Concrete TechnologyOpen Access

Effect of MgO Grades and Admixtures on the Rheological Behavior and Reactivity of MgO-Metakaolin Blends

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Authors

YBYoussef El BitouriJJJacques JabbourJMJoe Maalouf

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Overview

Randomized trial assesses how MgO grades and admixtures influence rheological behavior in magnesium silicate cement, suggesting improved formulations.

Key Points

  • This study aims to investigate how different grades of magnesium oxide affect the rheological and reactivity properties of magnesium silicate cement.
  • Examined three grades of light-burned magnesium oxide.
  • Used sodium hexametaphosphate and polycarboxylate-ether based superplasticizers as admixtures.
  • Conducted rheological tests, isothermal calorimetry, TGA, XRD analyses, and uniaxial compressive tests over 180 days.
  • Found that the MgO grade significantly affects rheological behavior and reactivity (specific surface area linked to calcination conditions).
  • Demonstrated that combining PCE with a sacrificial polymer (MS) can reduce required PCE dosage by up to 50%.

Cite This Study

Bitouri et al. (2026) studied this question.

synapsesocial.com/papers/6a76da64f12abadc79814a2bhttps://doi.org/10.3151/jact.24.468
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