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Experiments were carried out to determine the rational range of the proportion of fillers from sand and the dropout of crushing concrete scrap as a replacement part of the cement to obtain colloidal cement glue and to assess the effect of fillers of different specific surface area and the degree of filling on the kinetics of the set of strength of the hardened stone. It is established that the composition of the concrete scrap crushing drop-out contains about 30% of non-hydrated Portland cement, which deter-mines its use as an active micro-filler in the production of fine cement sys-tems. According to its chemical composition, the elimination of crushing of concrete scrap from heavy concrete is presented in the form of com-pounds of oxide groups, which, as a result of the interaction, provide the process of solid-phase synthesis of new compounds and are not able to en-ter into chemical interaction with pigments, the color of which is deter-mined by the type and content of iron oxides, and therefore has no contra-indications for use in decorative thin-milled cement systems.

Decorative coatings based on the processing of fine waste crushing concrete scrap