Библиографическое описание:High-calcium fly ash from pulverised coal combustion as a component of expansive cements : научное издание / O. M. Sharonova, V. V. Yumashev, S. S. Dobrosmyslov. - Текст : непосредственный // Chemistry for Sustainable Development. - 2025. - Т. 33, № 6. - P. 777-784. - The work was carried out within the State Assignment for the Institute of Chemistry and Chemical Technology of FRC KSC SB RAS (Project No. FWES-2021-0013). - ISSN 1817-1818, DOI 10.15372/CSD2025715.
Аннотация:The use of high-calcium fly ash (HCFA) as an expanding component of cements contributes to an increase in the level of their utilisation and improvement of binding properties. The influence of HCFA fractions of different size and composition on the expanding effect of binders based on them is studied in the work. The binders based on 100 % of three industrial fractions of high-calcium fly ash of different dispersion and composition, sampled from the 1<sup>st</sup>, 2<sup>nd</sup> and 4<sup>th</sup> fields of the Krasnoyarsk TPP-2 electrostatic precipitators, were studied; the expanding effect of binders based on these fractions was determined with respect to Portland cement (PC) grade CEM I 42.5N. It was determined that an increase in the volume of hardening specimens is 6-19 and 6-42 % after hardening for 5 and 120 days, respectively. An increase in the volume of specimens correlates with the content of CaO and MgO oxide phases in the initial HCFA fractions and is accompanied by a decrease in the average density and compressive strength. The specimens of cement-fly ash compositions with the content of 50 % PC and 50 % HCFA, including a mixture of different fractions of FA, were studied. The positive effect of HCFA fractions on the properties of composite cement, including the regulation of the expansion effect and an increase in compressive strength, was determined.
Издательство:Сибирское отделение РАН, Институт химии твердого тела и механохимии СО РАН, Институт катализа им. Г.К. Борескова СО РАН, Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН, Федеральный исследовательский центр угля и углехимии СО РАН, Novosibirsk
Источник:Chemistry for Sustainable Development
Выпуск:Т. 33, № 6
Номера страниц:777-784
Держатель оригинала документа:Krasnoyarsk Scientific Centre SB RAS, Krasnoyarsk Scientific Centre SB RAS, Institute of Chemistry and Chemical Technology SB RAS, Siberian Federal University
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