Abstract
The state of Gujarat has quite a substantial amount of kaolinitic clays found uniformly distributed across the state. Most of the clays are surface outcrops with varied quality. They are used for ceramic, paper, textile and cement industries. The present study explores the use of calcined kaolinitic clays, limestone and clinker available in Gujarat for the production of pozzolanic cement. For production of the cement; clinker and limestone were procured from an existing cement production unit. Both the raw materials showed acceptable properties as per Indian cement industry standards. For the experimentation commercial grade gypsum was used with very low levels of P2O5. Various types of china clay were collected from Kutch area of Gujarat. These china clays were analysed in terms of kaolinite content and other mineral phases. Calcination experiments conducted in a static calciner showed optimum calcination between 700 and 800 °C with maximum reactivity. Various pilot blends in the lab showed encouraging results in terms of 3, 7, 14 and 28 days strength. It was concluded that the state of Gujarat has quite varied quality of china clay suitable for production of alternate cementitious blends.
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Acknowledgments
The authors are indebted to Swiss Agency for Development and Cooperation, Government of Switzerland for supporting this research on low carbon cement. Sincere thanks to Prof. Karen Scrivener, EPFL, Switzerland for her never ending technical guidance, analysis of samples and motivation during the entire period of work. Thanks are also due to IIT Delhi for testing and analysis of samples. Our sincere thanks to Dr. Anjan K Chatterjee for his constant guidance, motivation and valuable suggestions during the entire course of work.
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Haldar, P.K., Maity, S. (2015). Suitability of Raw Materials in Gujarat for Production of Low Carbon Cement. 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_56
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DOI: https://doi.org/10.1007/978-94-017-9939-3_56
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