Use of wastes of rubble crushing in the concrete structure allows improving physical and mechanical properties and resolving the issue of recycling. Their use as fillers in self- compacting concrete will reduce costs and improve the economic attractiveness of this material. In the course of the research the compounds of self-compacting concrete with the use of waste powder of rubble crushing were obtained. For such concretes the optimal superplasticizer, featuring additional stabilizing effect that allows obtaining a homogeneous concrete mix, was selected. The results of the study show the relation between cement consumption and viscosity of concrete mix; the dependence of the superplasticizer consumption on the cement type. Application of waste powder can reduce the consumption of silica fume in the composition of self-compacting concrete and achieve strength 58,5 MPa at a rate of 400 kg /m3
The article shows a study of the effect of hydrated Portland cement, aggressive towards basalt fiber, and more aggressive saturated lime solution over time. The degree of destruction of basalt fiber over time has been established.
The article deals with the influence of a number of factors on the properties of ash-alkaline binders, the values obtained during testing of physical and mechanical parameters of ash-alkaline binders such as density, softening coefficient and strength are given. A complete factorial experiment was conducted to determine the optimal composition of the ash-alkali binder and determine the influence of the main factors on its strength. Based on the data of x-ray diffraction analysis, a conclusion is made about the phase composition of the artificially synthesized stone.
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