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EFFICIENCY OF USE OF TITANOSILICATE POWDERS IN CEMENT COMPOSITES

CEMENT

UDC 666.9.035

Tyukavkina V. V. Cand. Tech. Sci., senior researcher, Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials named after I. V. Tananaev, FIC KSC RAS

Gerasimova, L. G. Dr. Tech. Sc., Head of Sector “Functional materials from natural titanium-containing raw materials and industrial wastes”, ICTREMRM, Kola Science Centre RAS, Apatity, Murmansk region

Tsyryatyeva A. V. engineer, Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials named after I. V. Tananaev, FIC KSC RAS

Alitinform №2 (55) 2019 г. 2-14 стр.

Abstract

The possibility of using in cement composites an additive, consisting of the mixture of silicon and titanium oxides (TSP — titanosilicate precipitate), obtained by coprecipitation during the interaction of titanite with hydrochloric acid was studied. It was revealed that preliminary heat treatment of TSP leads to the decrease in particle size, the decrease in its porosity, and the formation of a stable structure of titanium dioxide. TSP contributes to the formation of an additional amount of calcium hydrosilicates, a denser microstructure of the binder matrix, which provides the highest strength characteristics of cement stone. With the introduction of 1 mass % titanosilicate powder together with a superplasticizing additive, the strength of the cement stone after 1 day of hardening increases by 43–65 %, and after 28 days by 14–28 %. With TSP, cement composites acquire photocatalytic activity in both the ultraviolet and visible regions of the spectrum.

Key words:

“titanosilicate precipitate”, modifier, cement building materials, strength, photocatalytic properties

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