Abstract
The gray-green limestone from Agios Panteleimonas is studied in this paper after submitting it in special technological analyses in order to determine the possibility for quicklime production. Cubic test specimens with mean 50 mm edge length were calcined at 850, 950 and 1,050°C, with 150 min preheating time and 120 min retention time at each calcination temperature. At the dissociation temperature of pure calcite (898°C) only one half of the initial limestone has been calcined. The dissociation of the specimens started at 740°C and almost completed at 1,050°C. Probably, the large edge length of the cubic specimens and the low retention time are responsible for the incomplete calcination at 1,050°C. The dry apparent weight of the calcined lime-stone (1.577 g/cm3), its low shrinkage (0.1–0.3%), the 2% impurities content and the 24% value of the attrition and abrasion resistance, characterize this quicklime and classify it to the high quality products.
Résumé
Dans cet article, le calcaire gris-vert d'Agios Panteleimonas est étudié par rapport à la possibilité de son utilisation pour la production de chaux, après avoir été soumis à des essais technologiques spéciaux. Des éprouvettes cubiques de 50 mm de côté ont été calcinées à 850, 950 et 1050°C, chauffées pendant 120 min à chaque température, après leur préchauffage pendant 150 min. La dissociation des éprouvettes a été réalisée par augmentation de la température de 740°C à 1 050°C. Dans ce cadre, seulement la moitié du calcaire initial a été calcinée à la température de dissociation de la calcite pure (898°C). La grande taille des éprouvettes et la courte durée des essais, sont responsables de la calcination incomplète, à la température de 1 050°C. La masse volumique apparente sèche du calcaire calciné (1,577g/cm3), son retrait faible (0,1–0,3%), le taux d'impuretés (2%), le coefficient d'attrition (24%) et la résistance à l'abrasion, caractérisent cette chaux vive et la classent comme étant un produit de haute qualité.
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Editorial note The authors work at the Aristotle University of Thessaloniki, a RILEM Associate Member.
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Kantiranis, N., Tsirambides, A., Filippidis, A. et al. Technological characteristics of the calcined limestone from Agios Panteleimonas, Macedonia, Greece. Mat. Struct. 32, 546–551 (1999). https://doi.org/10.1007/BF02481640
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DOI: https://doi.org/10.1007/BF02481640