About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Rakhimov R.Z. – doctor of technical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Rakhimova N.R. – doctor of technical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Gaifullin A.R. – candidate of technical sciences, associate 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, Кazan, Zelenaya st., 1 Morozov V.P. – doctor of geological and mineralogical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan Federal University The organization address: 420008, Russia, Kazan, Kremlyovskaya st., 18 |
| Title of the article | Dehydration of the clays of different mineral composition at calcination |
| Abstract. | Further development of the production and use of Portland cement to a certain extent is linked to the expansion range of the supplementary cementitious materials and their application volumes. The most significant kind of this supplementary material in terms of raw materials base is ubiquitous and cheap raw clay, which is used in the calcined and a ground form. Pozzolanic activities of local raw materials depend on its composition, calcination temperature and features of hydration. This article presents the results of the thermal analysis of clays with different polymineral composition of 7 different deposits. The intervals and peaks of the 5 endothermic effects related to mass change due to water loss of the different coherence and to decomposition of the certain non-clay minerals and pozzolanic activity are determined. The dehydration kinetics of the clays with determined for each temperature peak and weight loss in different intervals is studied. The kinetics of dehydration of clays of different mineral composition with loss of free, adsorptive, zeolite, crystal and constitutional water is connected with pozzolanic activity of calcination products, which is caused by changes in state and form of crystal lattice, breaking of certain bonds, partial destruction of crystal lattice of clay minerals and their disintegration on separate oxides. |
| Keywords. | clay, composition, mineral analysis, thermal, endothermic effect, temperature, mineral, peak, mass. |
| For citations: | Rakhimov R.Z., Rakhimova N.R., Gaifullin A.R., Morozov V.P. Dehydration of the clays of different mineral composition at calcination // Izvestiya KGASU. 2016. №4(38) P.388-394. |
