Journal of Siberian Federal University. Engineering & Technologies / The Effect of Mechanical Activation on the Stabilization of Ash Properties of Krasnoyarsk CHP

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Issue
Journal of Siberian Federal University. Engineering & Technologies. 2018 11 (7)
Authors
Endzhievskaya, Irina G.; Vasilovskaya, Nina G.; Dubrovskaya, Olga G.; Baranova, Galina P.; Chudaeva, Alena A.
Contact information
Endzhievskaya, Irina G.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; ; Vasilovskaya, Nina G.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; Dubrovskaya, Olga G.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; Baranova, Galina P.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; Chudaeva, Alena A.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia
Keywords
ashes of Krasnoyarsk CHP; chemical composition; mineralogical composition; phase composition; physical and mechanical properties; cavitation; hydrodynamic dispersant; bending strength; compressive strength
Abstract

In this article the genesis of the technogenic product that determines its composition, structure, state, and properties is analyzed. The possibility of using technogenic waste from Krasnoyarsk HPS in the production of building materials was considered. It is shown that considerable fluctuations in the chemical composition and structure of the ash of CHP-2 necessitate additional influence on it in order to stabilize the composition and properties, and also to prevent the negative effect of CaO, caused by late hydration due to the vitreous surface shell. To remove the danger of destructive processes in hardening products of ash-based building materials by neutralizing free calcium oxide, as the primary causes of stone structure defects, stabilization of ash composition and the possibility of using it as a filler in cement compositions (concretes, solutions), it is advisable to activate it in a hydrodynamic disperser. A study of the phase composition of hardening products of cement-free ash-free formulations showed that after activation it is more homogeneous, with a small number of reflections, which indicates greater homogeneity and stability of the structure. The increase in strength characteristics is also related to the uniformity of the change in the volume of activated ash

Pages
842-855
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/109154

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