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The influence of mechanical and chemical activation on the mechanical properties of high-density concrete and cement mortar has been studied. Portland cement optimum content necessary for apparent increase in the mechanical properties of cement composites has been determined. The size-content study of the mechanically and chemically activated cement has been undertaken. The heat emission development of the mortar based on activated binder has been studied by means of calorimetric measurements. It has been demonstrated that increase in concrete hardening after the activation originates from formation of the cement fine-crystalline structure. According to the elemental analysis data, hydrated calcium silicates (CSH) are developed in spherical globules. Source

Kats B.A.,Kazan State University of Architecture and Engineering
Complex Analysis and Operator Theory | Year: 2012

We study boundary properties of the Cauchy transform of certain distributions with supports on non-rectifiable curves and apply these results for solution of the Riemann boundary value problem. © 2010 Springer Basel AG. Source

Rakhimova N.R.,Kazan State University of Architecture and Engineering
Revista Romana de Materiale/ Romanian Journal of Materials | Year: 2015

The effects of ground used sand (GUS), ground fly ash (GFA) (class F), and microsilica (MS) on water requirement, setting time, and compressive and bending strength development of alkali-activated slag-blended cements (AASBC) were studied. Siliceous blending materials were found to be able to replace up to 50% of ground granulated blast furnace slag (GGBFS) and contributed to up to 90% improvement of strength of AASBCs, The granulation for GUS, granulation, curing conditions, and basicity of GGBFS for GFA, and curing conditions for MS have effects on the development of the properties of the AASBCs. © 2015, Procema SA. All rights reserved. Source

Akhmadiev F.G.,Kazan State University of Architecture and Engineering
Theoretical Foundations of Chemical Engineering | Year: 2014

A brief review of general approaches to solving multicriteria optimization problems, their advantages and disadvantages, and computational bottlenecks in the solution of certain problems with numerical implementation was performed. The optimization solutions for three specific types of engineering processes were given with relation to the construction of their mathematical models based on different approaches. The numerical results of solving the optimization problems for the considered examples used in practice for the optimal implementation of corresponding processes were obtained. © 2014, Pleiades Publishing, Ltd. Source

Stroganov V.F.,Kazan State University of Architecture and Engineering
Polymer Science - Series D | Year: 2015

The influence of the structure of adamantane-containing epoxy polymers (EP) on their resistance to thermal, chemical, and biological aging under conditions of the action of aqueous solutions of the carboxylic acids, which are known as metabolites of the vital activity of mold fungi, is studied. It is established that the adamantane-containing EP show higher heat resistance and thermal stability than do epoxy amine polymers based on aliphatic diamines, providing high adhesive strength up to temperatures ranging from 150 to 200°C. It is shown that incorporation of the adamantane fragments into the structure of a hardening agent increases the resistance of the epoxy polymers to aggressive media (water, alkalis, acids, and solvents), including metabolites of mold fungi. © 2015, Pleiades Publishing, Ltd. Source

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