Synthetic Titanosilicate Additives for Special Cement Composites

Resumo

Abstract—The effect of titanosilicate powder by-products of different composition and dispersion on the cement stone hardening kinetics and the main technical properties are studied. It is shown that titanosilicate additives act as a modifier promoting cement hydration and, accordingly, hardening. Moreover, the higher the specific powder surface, the greater the initial strength of the cement stone. The titanosilicate product with the highest BET surface area (50.2 m²/g) is overactive, which contributes to an increase in the cement stone strength factor at 1 day by 39–59% compared with the reference composition. It is established that the optimal amount of the composition additive in which the cement stone is maximally strong is 1 wt %. It is shown that the presence of a photocatalytic titanosilicate additive in the cement stone provides its capacity for self-cleaning. The most intense degradation of dyes, up to complete decomposition, is observed in samples modified with powder with the highest BET surface area. No dependence of photocatalytic activity on the amount of additive in the cement stone is detected. The obtained results can be used in the technology of modern construction materials with special properties.