Production of alinite-chlormayenite clinker and its hydration behavior with increasing gypsum content

An alternative low-energy alinite-chlormayenite clinker was produced and its hydration with different gypsum content was studied. The clinker was produced at 1225 °C using reagent-grade materials in an electric kiln with alinite, larnite, and chlormayenite content of 48, 24, and 16 wt%, respectively...

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Bibliographic Details
Published in:Cement and concrete research 2025-03, Vol.189, Article 107774
Main Authors: Simoni, Marco, Baral, Aniruddha, Ren, Zhili, Duvallet, Tristana Y., Jewell, Robert B., Rößler, Christiane, Hanein, Theodore
Format: Article
Language:English
Subjects:
Alinite
Chlorine
Chlormayenite
Ettringite
Friedel's salt
Gypsum
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Summary:An alternative low-energy alinite-chlormayenite clinker was produced and its hydration with different gypsum content was studied. The clinker was produced at 1225 °C using reagent-grade materials in an electric kiln with alinite, larnite, and chlormayenite content of 48, 24, and 16 wt%, respectively. The hydration kinetics of the clinker with different gypsum additions (0,10, 20, and 40 wt%) did not have a distinct induction period, and the hydration was faster than Portland cement. Alinite was in general more reactive than chlormayenite. In the presence of a limited amount of gypsum (10 and 20 wt%), alinite consumed gypsum to form ettringite within the first hour of hydration, and both alinite and chlormayenite formed Friedel's salt after gypsum was exhausted. Sufficient gypsum availability (40 wt%) slowed down the dissolution of alinite and chlormayenite for the first hour of hydration but enabled both chlormayenite and alinite to form ettringite.
ISSN:0008-8846
DOI:10.1016/j.cemconres.2024.107774