<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy, the right production conditions can affect the pozzolanic activity of calcined clays. In this paper, the pozzolanic reactivity of two calcined natural clays in dependence of burning temperature, residence time in the furnace, cooling conditions and particle size of the final product is investigated. The highest pozzolanic reactivity was found at calcination temperatures between 600 and 800°C. While different cooling conditions had no identified effect on reactivity, decreased particle size and residence time increased the reactivity.</p></abstract>

Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy, the right production conditions can affect the pozzolanic activity of calcined clays. In this paper, the pozzolanic reactivity of two calcined natural clays in dependence of burning temperature, residence time in the furnace, cooling conditions and particle size of the final product is investigated. The highest pozzolanic reactivity was found at calcination temperatures between 600 and 800°C. While different cooling conditions had no identified effect on reactivity, decreased particle size and residence time increased the reactivity.

The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy,...

The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays

Publié en ligne: 31 déc. 2018

Pages: 1 - 12

Reçu: 19 juin 2018

Accepté: 15 oct. 2018

DOI: https://doi.org/10.2478/ncr-2018-0011

Mots clés
Calcined clay, pozzolana, lime consumption, heating, particle size

© 2018 Tobias Danner et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays

Publié en ligne: 31 déc. 2018

Pages: 1 - 12

Reçu: 19 juin 2018

Accepté: 15 oct. 2018

DOI: https://doi.org/10.2478/ncr-2018-0011

Mots clésCalcined clay, pozzolana, lime consumption, heating, particle size

© 2018 Tobias Danner et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Calcined clay, pozzolana, lime consumption, heating, particle size