The Role of Calcined Clay Cement vis a vis Construction Practices in India and Their Effects on Sustainability

Emmanuel, Arun C.; Parashar, Anuj; Bishnoi, Shashank

doi:10.1007/978-94-017-9939-3_51

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“…However, even where it is available, its share in blended cements production is not large. In India, for example, Portland slag cement accounts for only about 8% of total cement production, while ordinary Portland cement accounts for 24% of production, and Portland pozzolana cement accounts for 65%, where the main addition is fly ash [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Calcined Clay as Supplementary Cementitious Material

2020

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Calcined clays are the only potential materials available in large quantities to meet the requirements of eco-efficient cement-based materials by reducing the clinker content in blended cements or reducing the cement content in concrete. More than 200 recent research papers on the idea of replacing Portland cement with large amounts of calcined clay are presented and discussed in detail. First, the fundamental information about the properties and structure of clay minerals is described. Then, the process of activation and hydration of clays is discussed, including the methods of pozzolanic activity assessment. Additionally, various testing methods of clays from different worldwide deposits are presented. The application of calcined clay in cement and concrete technology is then introduced. A separate chapter is devoted to lime calcined clay cement. Then an influence of calcined clay on durability of concrete is summarized. Finally, conclusions are formulated.

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Section: Introductionmentioning

confidence: 99%