The reaction between metakaolin and limestone and its effect in porosity refinement and mechanical properties

By F. Zunino, Karen L. Scrivener. 2021

383 citations recorded by the source corpus.

Abstract In limestone calcined clay cements (LC3), more hemicarboaluminate and monocarboaluminate is observed, as compared to other blended cements, from the reaction of metakaolin with limestone. In this study, it is shown that the formation of these carboaluminate phases, predominantly occurs during a “third” hydration peak, after the main alite and aluminate peaks. The influence of the metakaolin content, level of sulfate addition and the water to binder ratio on the position and magnitude of this peak were investigated. This precipitation of hemi and monocarboaluminate has a significant effect on porosity refinement and strength development. It was also observed that alumina from metakaolin can contribute to the precipitation of ettringite if sufficient sulfate is available.

Subfields: Biomaterials, Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/626e5d9f5248e3f3779be1f5d45284d904ef640d

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In Biomaterials

1. J. A. Neto
2. A. Kirchheim
3. Á. G. Torre

In Civil and Structural Engineering

1. J. A. Neto
2. A. Kirchheim
3. Á. G. Torre

In Materials Chemistry

1. J. A. Neto
2. A. Kirchheim
3. Á. G. Torre

Citations in the corpus

• Effects of sulfates on the hydration of Portland cement – A review (2021, methodology): “Zunino and Scrivener [9] disagree despite the majority of the studies indicating that the alumina content influences the optimum sulfate content.”