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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Ermilova E.U. – post-graduate student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kamalova Z.A. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Rakhimov R.Z. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleThe clay of Кoschakovsky field of Тatarstan Republic as a component of hybrid additive to blended portland cement
Abstract.Our earlier studies of the creation of blended cements with hybrid additives based on metakaolin, fly ash and tripoli, were allowed to save up to 30 % of the Portland cement (PC) without compromising strength. However, deposits of metakaolin are geographically limited, and its cost is higher than the cost of PC in 2-3 times. Recently in the global science of building materials the research to identify the effectiveness of using calcined clays as pozzolanic additives in the PC has expanded. Our previously conducted experiments were established that the introduction of clays, calcined at a temperature of 400 ?C and 700 ?C, in an amount up to 25 % by weight of PC, yields a similar effect as metakaolin, which the optimal substitution degree is only 3-10 %. So, we have attempted to create a hybrid additive on the based on the calcined polymineral clays of Koschakovsky field, tripoli, and fly ash were developed with using the method of mathematical planning of the experiment. The paper shows the possibility of metakaolin replacement by calcined clay in the hybrid additive. The comparative results of the using of hybrid additives with metakaolin and clay was obtained. The physico-chemical properties of the blended cements with hybrid additives were investigated.
Keywords.blended portland cement, hybrid additives, clay, mineral additives.
For citations:Ermilova E.U., Kamalova Z.A., Rakhimov R.Z. The clay of Кoschakovsky field of Тatarstan Republic as a component of hybrid additive to blended portland cement // Izvestiya KGASU. 2015. №4(34) P.259-265.


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