Journal of Siberian Federal University. Chemistry / Influence of Chemical Additives on the Properties of Composite Materials Based on Fine-Dispersed High-Calcium Fly Ash

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2020 13 (3)
Authors
Sharonova, Olga M.; Kirilets, Valerii M.; Solovyov, Leonid A.; Anshits, Alexander G.
Contact information
Sharonova, Olga M.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; ; Kirilets, Valerii M.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Solovyov, Leonid A.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Anshits, Alexander G.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation
Keywords
composite material; high-calcium fly ash; superplasticizer; hardening accelerator; retarder.
Abstract

Composite materials (CM) were obtained on the basis of fine- dispersed high-calcium fly ash (HCFA), selected from the 4th field of electrostatic precipitators of Krasnoyarsk TPP-2, with the addition of Melflux 5581F superplasticizer at the water: binder ratio W/B = 0.25. The influence of the concentration of superplasticizer in the range 0.06-0.6 wt. % on the strength properties of composite materials was studied. The effect of the addition of sodium sulfate as an accelerator of hydration hardening and additives-retarders of sodium phosphate, sodium tetraborate and citric acid, were studied. The optimal concentration of superplasticizer was established (0.3 wt. %). It was determined that sodium sulfate helps to improve the strength of CM, and the addition of sodium tetraborate and citric acid can effectively regulate the setting time

Pages
395-407
DOI
10.17516/1998-2836-0192
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/136702