Abstract
This paper introduces a new rapid, relevant and reliable (R3) test to characterize the pozzolanic reactivity of calcined clays. This test uses isothermal calorimetry to evaluate the reactivity by monitoring the heat release in portlandite/calcined clay/limestone model systems. Once the mix design was adjusted, a wide range of calcined clays was investigated. Tests were first run at 20 °C. Good correlations were found between the heat release at 6 days and the compressive strength results on mortar blends containing calcined clays and limestone. Another series of tests were carried out at 40 °C, enabling the isothermal calorimetry test duration to be reduced from 6 to 1 day, while keeping good correlations with strength results.
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References
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Acknowledgments
F. Avet and R. Snellings respectively acknowledge financial support by the Swiss Agency for Development and Cooperation (SDC) and the European Community under FP7-Marie Curie IEF grant 298337.
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© 2015 RILEM
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Avet, F., Snellings, R., Alujas, A., Scrivener, K. (2015). Development of a New Rapid, Relevant and Reliable (R3) Testing Method to Evaluate the Pozzolanic Reactivity of Calcined Clays. In: Scrivener, K., Favier, A. (eds) Calcined Clays for Sustainable Concrete. RILEM Bookseries, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9939-3_67
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DOI: https://doi.org/10.1007/978-94-017-9939-3_67
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Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-017-9938-6
Online ISBN: 978-94-017-9939-3
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