Abstract
The scope of the study is to test the influence of nanocomposite silica-titania (mSiO2/TiO2) core-shell structures on the mechanical and bactericidal properties of cement mortars. Nanocomposites are widely applied in many fields of science however, cement-based composites are mainly modified with single type of nanostructures. The goal of the presented work is to obtain a nanocomposite which exhibits the positive properties of both nanomaterials, while diminishing the negative impacts of each of the nanomaterials applied separately. The study shows that application of silica-titania (mSiO2/TiO2) core-shell nanostructures simultaneously demonstrated the properties of nanosilica and titanium dioxide and thus the nanomaterial behaved not only as a filler to improve the microstructure and activator to promote pozzolanic reaction, but also exhibited self-cleaning and bactericidal properties when exposed to UV light. The observed improvement of compressive strength was caused by the presence of nanosilica (acting as a core) while titanium dioxide (shell) exhibits photocatalytic activity.
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