Statement of the problem. Based on the analysis, consider the historical and cultural heritage of Russia's horse-breeding complexes founded in the mid-18th and early 19th centuries. The main components of the overall structure are identified. The purpose of the study is to identify the prerequisites for the further sustainable development of territories of a complex hierarchical object (demoecosystem) with a production objective function and its further impact on the formation of a new agritourist environment. The identification and classification of factors that determine the functioning of horse-breeding complexes should be one of the crucial factors in making final decisions regarding their transformation. Results. The features of preserving architectural and cultural heritage have been studied and defined on the example of the conducted research of one of the state stud farms founded in the Russian Empire. Scientific and public interest in national treasures is increasing. Modern opportunities provide opportunities for studying and replenishing information. Conclusions. The need for the development of a tourist and recreational network with the involvement of the architectural heritage of the region's historical and cultural environment has been identified. The results of the study can be used in the development of regional transformation projects.
Statement of the Problem. Steel corrosion causes 3—4 % of global GDP losses yearly; incumbent primers are petroleum-based, VOC-intensive and increasingly costly. Simultaneously, waste-polystyrene foam accumulates in landfills because it is non-biodegradable and has low recycling value. Results. A dissolution-modification-composite route converted waste-polystyrene into a high-performance coating by substituting 28% alkyd resin with modified polystyrene. The formulation, incorporating n-SiO₂, iron oxide red, ZnO, and triethanolamine, exhibits: withstands 200 h water immersion (≈ 3 × commercial primer); survives > 300 h UV-B (≈ 40 % above 216 h benchmark); retains 2.0 MPa adhesion and 30 kg·cm impact; costs 1792.8 US $ t⁻¹ (8—17 % below domestic/imported grades). 20 kg pilot and 12-month coastal field tests reproduced lab metrics without rust creep or gloss loss. Conclusions. Waste-polystyrene can be valorised into a drop-in, high-performance anticorrosion coating that cuts plastic waste, lowers carbon footprint and meets industrial specifications, offering SMEs a circular-economy pathway.
Statement of the problem. To ensure traffic safety on motor roads during the winter period, it is essential to conduct timely maintenance activities while considering the specific features that may lead to the formation of winter slipperiness. Addressing this issue requires accounting for the microclimatic characteristics of individual road sections. To study the influence of road-related factors on the conditions that lead to various types of slipperiness, an analysis of specialized road meteorological information is necessary. Such information is collected using sensors from road weather stations (RWS). Results. An analysis of the spatial and temporal scales of weather parameters was conducted to justify the need for specialized road meteorological observations. The technical means for conducting these observations were examined. Additionally, information from RWS located on sections with varying road parameters was analyzed. Conclusions. Preliminary results indicate differences in the measured parameters. The analysis of these results supports the conclusion that additional research is necessary to develop relationships that describe the formation of slipperiness, taking into account the specific characteristics of road sections.
Statement of the problem. The active development of turbulence theory occurred in the twentieth century and many authors proposed their models that allow determining the coefficient of hydraulic friction for various categories of pipelines depending on the fluid flow mode. A comprehensive analysis of the adequacy of using various models to find the coefficient of hydraulic friction for the design conditions of heating networks has not been carried out, and it is not completely clear what errors occur when using them. Results. The results of calculating the coefficient of hydraulic friction are presented using currently used models in the range of water flow rates in heating networks from 0,1 to 3,5 m/s, for new steel pipelines with an internal diameter from 26 to 1396 mm. Equations are proposed that allow calculating the values of the relative error in calculating the coefficient of hydraulic friction using various models. Based on the Altshul equation, an expression is proposed that allows for a high-accuracy approximation of the Colebrook — White model. Conclusions. The applied models for calculating the coefficient of hydraulic friction give the closest results in the area of the quadratic law of resistance with an internal diameter of 412 mm, with a decrease in diameters the average value of the relative error increases, reaching 16,8 %. The proposed equations allow in practice to carry out calculations with high accuracy without implementing numerical methods.
Statement of the problem. The features of the structure and properties of mastic waterproofing, which is a liquid polymer-bitumen compositions of cold use with a high degree of protection, good adhesion, forming a continuous seamless membrane on the surface of building structures, are considered. Results and conclusion. The basic physical and mechanical properties of modern waterproofing mastic have been studied. During the assessment of the technological factors influencing the properties of the mastic, the most significant ones were identified, such as the accuracy of the dosage of the components, the parameters of mixing the mastic during cooking, cooking time and its temperature. The identified factors and the conducted studies of the physical and mechanical properties of mastics allowed us to recommend a coating that will have improved elastic deformation properties and thereby an extended service life.
