3. Metakaolins: definitions and parameters governing their reactivities
Metakaolins (Al 2 O 3 , 2SiO 2 ) are obtained by calcining kaolin clay at temperatures between 500 and 800°C. Heat treatment results in the destruction of the crystalline structure and dehydroxylation of the initial kaolin (loss of structural water). The processes most commonly used for the commercial production of metakaolin are rotary, flash and plate furnaces.
3.1 Physico-chemistry of metakaolins
Metakaolins are characterized by various physicochemical parameters such as chemical composition, granulometry, specific surface area, zeta potential, etc. Studies
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Metakaolins: definitions and parameters governing their reactivities
Examples of other aluminosilicate sources: effect of temperature treatment mode
Bibliography
Bibliography
Standards and norms
- Standard Test Methods for Compressive Strength of Molded Soil-Cement Cylinders - ASTM D 1633 - 01-17
- Cement testing methods – Determination of shrinkage and swelling - NF P15-433 - 02-94
- Agglomerated stone – Test methods – Part 5: Determination of resistance to freezing and thawing - NF EN 14617-5 - 07-12
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