Abstract
Two brick clays (rich in 2:1 clay minerals) and a low-grade kaolinitic clay were studied regarding their transformations during calcination and their performance in blended cement mortars. The mortars with calcined clays exhibited decreased workability (slump flow), but this effect could be mitigated by employment of a conventional superplasticizer; however, compressive strength of the hardened mortar was lowered in some cases. While the kaolinitic clay generally yielded the highest strength, the performance of a brick clay could be increased by grinding to higher fineness and by mixing it with the kaolinitic clay.
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Acknowledgements
This work was funded by the German Federal Ministry of Education and Research (BMBF) (KMU innovativ, Förderkennzeichen 01LY1610B). The authors are grateful to H.-J. Schröder (KERATON Kies- und Tongruben GmbH, Plessa) and M. Neubert (Technische Universität Bergakademie Freiberg) for their support and valuable discussions.
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Msinjili, N.S., Sturm, P., Kühne, HC., Gluth, G.J.G. (2020). Comparison of Brick Clays and a Kaolinitic Clay Regarding Calcination and Performance in Blended Cement Mortars. In: Bishnoi, S. (eds) Calcined Clays for Sustainable Concrete. RILEM Bookseries, vol 25. Springer, Singapore. https://doi.org/10.1007/978-981-15-2806-4_10
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DOI: https://doi.org/10.1007/978-981-15-2806-4_10
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