Abstract
The article presents the results of comparative tests of samples of fine-grained vibropressed concrete for paving blocks with modifiers for volumetric hydrophobization based on a dispersion of calcium stearate, an emulsion of polysiloxane and an additive based on a mixture of a dispersion of calcium stearate and an emulsion of polysiloxane. To increase the operational reliability and durability of the vibropressed paving slab an important role is played by properties such as water absorption, frost resistance and corrosion resistance. The aim of the work is to research of the effectiveness of complex modifying additives to increase the frost resistance and corrosion resistance of fine-grained concrete for paving slabs. The researches were carried out according to standard methods in accordance with current regulatory documents. It was revealed that the additive based on a mixture of a dispersion of calcium stearate and polysiloxane had the greatest hydrophobic effect. Concrete products based on these modifiers have shown significant improvement in properties such as water absorption, frost resistance and corrosion resistance compared to an unadulterated sample and samples based on calcium stearate.
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