The article explores the vibration form for forming single-type Ferro-concrete products, where the partition walls as an active working body has the opportunity to be involved in resonance oscillations, which allows to reduce the compaction time and reduce the energy costs for manufacturing products. Partitions dynamic characteristics the as well as the effect of the partitions oscillations on the sealing medium are studied mathematically.

Dynamic system calculation scheme "Vibrating machine is compacting medium", where the latter is represented as a system with distributed parameters is compiled. As a result of the wave equation of oscillations solution, the law of compacting medium deformation over the entire thickness of the concrete layer is determined depending on the increasing density of the molded mixture, its physico-mechanical characteristics, the thickness of the concrete layer, the mass of the oscillating part of the vibrating machine, the frequency and amplitude of the disturbing force, elastic suspension stiffness and coefficient inelastic resistance. Changes in the compacting concrete medium resistance forces during the vibration compaction, depending on its consistency are determined.

The article presents the design of shock-and-vibration machine for the formation of lightweight concrete products. The results of theoretical studies of the working process of the shock-and-vibration machine with the definition of motion and stress laws in a layer of a concrete mixture compacted in the kinematic excitation of oscillations are given. In paper the dependences for determining the reduced mass and the equivalent coefficient of inelastic resistance of a concrete mixture with asymmetric kinematic excitation of oscillations during the vibration seal are given. The practical application of the obtained results is offered.Keywords: shock-and-vibration machine, light concrete mix, compaction of the concrete mixture, stress in the layer of concrete mix.

The order of accounting and features of the methodology of cost expenditures at the concrete enterprises of the field was studied and it has been found out the fact that in the practical activity of the enterprise, they tend to apply the normative method of cost expenditures accounting. It has been conducted a detailed research of enterprises which use the normative method of cost expenditure accounting, and the calculation of the planned cost price. In addition, given advantages of the normative method of cost expenditure accounting have two functions: it provides the operational control over the production cost expenditures by accounting for cost expenditures under current norms and their changes and provides accurate calculation of the cost price of construction products.

M. P. nesterenko, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-8961-2147, P. О. Molchanov, Cand. Sc. (Tech.), orcid.org/0000-0001-5335-4281, V. М. Savyk, Cand. Sc. (Tech.), orcid.org/0000-0002-0706-0589, M. M. nesterenko, Cand. Sc. (Tech.), orcid.org/Purpose. Development of the mathematical model of the vibration machine for the formation of largesized massive reinforced concrete products.Methodology. Theoretical studies were based on the use of the classical theory of mechanical system vibrations, solid media and applied mechanics. For the analysis of mathematical models, analytical and numerical methods with the use of PC were used.findings. With the help of the mathematical study on the working body spatial movement, a dynamic model of the vibration platform in the form of a hard body based on elastic support is developed. The vibration platform is driven by three vibration gen erators, which are switched in pairs in turn after a given operating mode. The system of the electric drive is proposed according to the scheme of simultaneous alternating work of two vibration generators, which combines the positive properties of the classical drive system of vibration machines with improved performance indicators for the formation of largesized reinforced concrete products. Differential equations were obtained which allow determining the parameters of each vibration generator to provide a given vibration amplitude of the vibration platform.originality. The dynamic model of the vibrational stand based on elastic support and driven by three vibrational generators with pairwise alternating of their activation according to the given mode of operation has been obtained.Practical value. The rational parameters of each of three vibration exciters are determined to ensure the given amplitude of vi bration of the vibration plate.