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, senior lecturer 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 geologo-mineralogical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan (Volga region) Federal University The organization address: 420008, Russia, Кazan, Kremlyovskaya st., 18 |
| Title of the article | Effect of thermally activated marl additives on the properties of cement stone |
| Abstract. | Problem statement. The increasing volumes of world production of Portland cement and the requirements to reduce CO2 emissions at the same time led to the need to increase the volume of mineral additives to it. Nowadays the promising source of raw materials for the production of supplementary cementitious materials is ubiquitous and unlimited reserves of polymineral clays. Results. The aim of this work was to study the effectiveness of marl additives in Portland cement, thermally activated at various temperatures and ground to a different specific surface. The results of the investigations made it possible to establish the effect of additives in Portland cement of calcined and ground marl on the normal density, density, strength, water absorption and the coefficient of softening of the cement stone. It has been established that additions to Portland cement of 10-20 % calcined at certain temperatures at 400-800 0C and ground to certain specific marl surfaces up to 250-800 m2/kg lead to a higher to 20-50 % compressive strength of cement stone than similar metakaolin additives. Conclusions. The scientific and practical significance of the results of the work for building materials and building industry is to establish the effectiveness of replacing scarce mineral additives in Portland cement with additives based on a non-deficient marl. |
| Keywords. | cement, mineral additive, metakaolin, calcination temperature, specific surface area, mineral composition, density, compressive strength, water adsorption, water resistance. |
| For citations: | Rakhimov R.Z., Rakhimova N.R., Gaifullin A.R., Morozov V.P. Effect of thermally activated marl additives on the properties of cement stone // Izvestiya KGASU. 2017. №2(40) P.228-240. |
