Durability Performance of Blended Cement with Calcined Illitic Shale
- Cordoba, Gisela Paola
- Rossetti, Agustín
- Zito, Silvina Vanessa
- Rahhal, Viviana Fátima
- Falcone, Darío
- Irassar, Edgardo Fabián
DOIAbstract
The use of calcined clays in cement (kaolinitic and common calcined clays) introduces challenges due to the high alumina content, large specific surface area, and high-alkali content. This paper examines the performance against sulfate attacks, alkali-silica reactions, and chloride penetration in mixtures with calcined illitic shale (CIS). Replacement of high and moderate alkali content cement with 25% CIS significantly reduces the expansion in the alkali-silica reaction (ASR) test, as the pozzolanic reaction contributes to the combination of alkalis. Replacing 20% white portland cement with CIS allows the formulation of sulfate-resistant cement by limiting the formation of gypsum and ettringite. The incorporation of 25% CIS in concrete doe...
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