This article is devoted to the study of the possibilities of machine learning technology for forecasting the demand for goods. The study analyzes various models and the possibilities of their application as part of the task of predicting future sales. The greatest attention is focused on modern methods of time series analysis, in particular neural network and statistical approaches. The results obtained during the study clearly demonstrate the advantages and disadvantages of different models, the degree of influence of their parameters on the accuracy of the forecast within the framework of the demand forecasting task. The practical significance of the findings is determined by the possibility of using the results obtained in the analysis of a similar data set. The relevance of the study is due to the need for accurate forecasting of demand for goods to optimize inventory and reduce costs. The use of modern machine learning methods makes it possible to increase the accuracy of predictions, which is especially important in an unstable market and changing consumer demand.

Keywords: machine learning algorithms, demand estimation, forecasting accuracy, time sequence analysis, sales volume prediction, Python, autoregressive integrated moving average, random forest, gradient boosting, neural networks, long-term short-term memory

The article discusses machine learning methods, their application areas, limitations and application possibilities. Additionally highlighted achievements in deep learning, which allow obtaining accurate results with optimal time and effort. The promising architecture of neural networks of transformers is also described in detail. As an alternative approach, it is proposed to use a generative adversarial network in the process of converting a scan into elements of a digital information model.

Keywords: scanning, point cloud, information model, construction, objects, representation, neural network, machine learning

Additive manufacturing technologies (AMT) has become one of the main trends in the development of innovative technologies in construction sector. The study examines the implementation of AMT using practical and illustrative example of its utilisation. In order to demonstrate and describe the sequence of steps 3D model of undersized building was created using fused deposition modeling (FDM). The methodology applied is model-driven. It was chosen in order to collect the experience, compare it with previous studied and use to the realistic manufacturing process. The aim of this paper was to identify possible limitations and challenging issues requiring further consideration and development. The main assumptions of this experiment are stated below with the purpose to explain the results obtained properly. In this study limitations of the previous studies are highlighted and possible solution methods are described referring to literature review and analysis. The main steps of AMT are shown step by step aimed to consistently study and reproduce the real process. The obtained information could broaden the current knowledge and help the researchers to apply the 3D printing (3DP) to access the full potential of it. Moreover, the paper also hypothesized the possible future directions for the future studies. Overall, the current key challenges to overcome in the nearest future are presented and discussed with a view to enable clean insights of AMT integration in construction sector.

Keywords: additive manufacturing, additive construction, construction technology, construction automation, digital construction, 3D printing, 3D model, civil engineering, emerging technology, fabrication, construction design, technology adoption

Numerical analysis of stress-strain state of monolithic slab with account of corrosion damage of concrete and reinforcement of compressed and tensile zones in the span part of the slab in PC LIRA-SAPR is carried out. 6 variants of corrosion damage depending on the area of spreading and degree of degradation are considered. The calculations have been carried out taking into account physical and geometrical nonlinearity. The peculiarities of structural deflections changes at different variants of corrosion damage and loading levels of the floor slab have been revealed. Redistributions of forces in spans and on supports arising at local changes of concrete and rebars stiffnesses are analyzed. No structural failure stage has been identified for the adopted design characteristics and damage variants.

Keywords: monolithic slab, corrosion damage of reinforced concrete, numerical analysis, redistribution of forces, bearing capacity, deformation capacity

The importance of recycling construction waste for the development of closed-loop economy technologies in the construction industry is considered. The effect of replacing high-quality granite and limestone crushed stone with secondary aggregate obtained by crushing concrete scrap on the strength properties of geopolymer concrete was investigated. It was established that such a replacement does not lead to a decrease in the strength of such concrete, and the impact resistance increases significantly.

Keywords: demolition waste, concrete scrap, recycling, geopolymer concrete, blast furnace granular slag, crushed stone crushing screening, closed-loop economy technologies, secondary aggregate, strength, impact resistance

The article presents the findings of research conducted on the issue of environmental safety for the population and the local techno sphere during the implementation of projects. The study provides scientific and methodological approaches to addressing the pressing issue of technical support for the author's supervision of the safe implementation of production process projects. It is demonstrated that a set of methods consisting of integrated system analysis and mathematical modelling should be employed as a fundamental analytical tool when constructing the proposed structure. The article goes on to propose the use of non-destructive testing techniques for conducting diagnostics of the environment and the quality of implemented processes. The article also develops substantiated proposals for the establishment of a unified system for the conducting and documenting of control measures, which would allow for the achievement of a reliability of safety control results at the level of 85-90%.

Keywords: environmental safety, technological process projects, implementation, author's supervision, system analysis, monitoring

The article presents the results of the second stage of a study to assess the load-bearing capacity of a running meter of a centrally loaded wall of various thicknesses, heights and strengths made of masonry. The second stage includes the study of masonry walls with elastic characteristics α = 200, 350, 500, 750 and is a logical continuation of the first stage, in which masonry with elastic characteristics α = 1000, 1200, 1500 was studied.The results of the study make it possible to minimize the use of a software package for preliminary determination of the bearing capacity of a centrally loaded stone structure and can become part of a practical guide for engineers involved in the technical inspection and design of masonry structures.

Keywords: bearing capacity, wall, stone structure, elastic characteristic of masonry, centrally loaded element, stone, brick, block, masonry mortar, coefficient of longitudinal bending, flexibility

The article is devoted to numerical modeling of corrosion-damaged reinforced concrete columns under low-cycle horizontal loading by static load in LS DYNA software package. The comparison of numerical calculation and experimental data on research of strength of reinforced concrete columns with corrosion damage of reinforcement under low-cycle horizontal loading is carried out.

Keywords: corrosion, reinforcement, seismics, reinforced concrete, corrosion damage, low-cycle strength, numerical modeling

Over the course of a thousand-year history of development, various types of transport facilities have emerged, disappeared, or been revived. Many industrial and transport infrastructure facilities have lost their current functions, but have historical value. Historical buildings of stables, carriage houses, post stations, tram and railway depots need renovation and repurposing for new current functions. Each of these facilities has its own design and planning features, which can become determining factors when choosing a new purpose.

Keywords: architecture of transport structures, objects of transport infrastructure, stables, carriage houses, postal stations, repurposing, functional structure, functionalism, architectural form, reconstruction, renovation

The use of the contact angle as a criterion for the degree of hydrophobization of a solid surface and gypsum particles in suspensions containing surfactants showed that an increase in the concentrations of ethyl silicone oil and soap naphtha in the initial gypsum suspensions led to an increase in the contact angle of wetting of solid particles to 82.5° and 77.5°, respectively. However, on the surfaces of the formed solid samples containing ethyl silicone oil, a drop of water spreading and its rapid absorption were observed. Solid samples containing soap naphtha in an amount of 3% had a hydrophobic surface characterized by a contact angle of 82.2°. Probably, the hydrophilic and hydrophobic properties of the solid surface of the material are determined by its bulk structure at the stage of formation, including under wave action. In this case, the porous-capillary structure of the formed samples containing gypsum and surfactants affects the determination of the wetting criterion.

Keywords: contact angle, hydrophobization, gypsum, soap naphtha, ethyl silicone oil, ultrasonic treatment

The location of the St. Petersburg Commercial Port on the left-bank territories of the Neva estuary is an element of the urban development tradition of St. Petersburg. The planning structure, the system of unique engineering structures, including the Sea Canal, have been preserved here. The development, created according to the projects of famous architects of the past period, has high historical and cultural value. The renovation of historical architecture does not go without contradictions with modern trends in the functional development of the port, especially in the coastal areas, where the main loading and unloading processes take place

Keywords: industrial complex, renovation directions, history of industrial architecture, preservation of historical architectural and urban environment, architectural form, reconstruction, renovation

The article is devoted to the analysis of the process of redesigning industrial buildings in Moscow in the context of urban development of the city. Based on data from the Moscow Department of Investment and Industrial Policy (2023), the current state of industrial zones (hereinafter referred to as industrial zones) is being investigated: 25% of the 150 facilities have already been redeveloped, and over 80 enterprises have been moved outside the MKAD since 2010. Successful transformations (ZIL, Hammer and Sickle, Red October) and criteria for choosing new functionality are considered: location, historical value, ecology, transport accessibility. Using cartographic data, promising areas for renovation (AZLK plant, Compressor, Rubber) have been identified and options for their adaptation have been proposed, from creative clusters to residential complexes. The role of redevelopment in the sustainable development of the city, the need to comply with environmental standards and take into account the needs of local communities is emphasized.

Keywords: Redevelopment, industrial buildings, urban spaces, renovation, industrial heritage, urban development, environmental standards, creative clusters, residential development, public spaces, urban planning policy, industrial zone, sustainable development

The article is devoted to the topic of improving the environmental characteristics of construction sites through the introduction of the principles of "green" construction through a comprehensive assessment of various criteria. Compliance with environmental standards contributes to the creation of a favorable urban environment and ensures comfortable living conditions for residents. The introduction of such approaches is becoming extremely important for sustainable development and the preservation of the natural balance.

Keywords: Green construction, ecological construction, life cycle, construction, multi-criteria decision-making.

The article describes the process of sedimentation in water treatment, as well as the formation of tap sludge. A new method of water supply sludge treatment with coagulant regeneration at high turbidity of initial water is proposed. On the basis of the conducted research it is revealed that the greater the coagulant consumption obtained by the sulfatization method, the better the degree of coagulation. The basic technological scheme of water sludge processing by sulfatization method is developed. It is suggested that the obtained coagulant from water supply sludge can be used for repeated preliminary sedimentation. Taking into account the urgency of the problem of providing the population with clean drinking water, it is recommended to conduct pilot testing of the obtained coagulant from tap sludge by the sulfatization method.

Keywords: water treatment, tap sludge, daily regulation basin, sedimentation, turbidity, sulfatization method

The article discusses the theoretical, methodological and applied aspects of the development of organizational and technological solutions for quality control of structures built using the "white bath" technology in civil engineering. The characteristic of this technology as a method of integrated waterproofing based on the use of waterproof concrete and a joint sealing system without the use of external protective coatings is presented. Attention is paid to identifying factors affecting the quality of the structure, including the composition of the concrete mix, the conditions of production and laying of concrete, the design and installation of joints. The paper proposes a methodology for building a quality control system that includes a step-by-step process management algorithm, formalization of evaluation criteria using mathematical modeling, and consideration of current regulatory requirements. The practical implementation of the proposed solutions at a specific construction site demonstrated a reduction in the proportion of defects, an increase in the strength of concrete and the water resistance of the structure, and an improvement in the technical and economic performance of construction. A comparative analysis of the effectiveness of a number of key parameters is presented. Conclusions are drawn about the expediency of introducing the "white bath" technology in a complex hydrogeological environment and the high practical significance of the developed organizational and technological solutions is confirmed. The work is aimed at specialists in the construction industry, designers, engineers and the scientific community involved in improving the reliability and durability of concrete structures.

Keywords: white bath, concrete, waterproofing, quality control, seams, water resistance, sealing, technology, building structure, additive, seal, strength, model, standard, defect

The paper presents the results of research into the efficiency of fine-grained concrete made using substandard materials and complex modifying admixture. The aim of the work is to evaluate the effect of multicomponent admixture on strength characteristics and efficiency of concrete. For this purpose the fractional factor experiment with variation of seven factors was applied, which were: microsilica, superplasticizers and other additives influencing both the properties of fine-grained concrete mixture and the properties of fine-grained concrete. The main criteria for assessing the influence of complex modifying admixtures were taken as the coefficient of structural quality and specific cement consumption per unit strength. The conducted research allowed to establish that the optimal composition of the additive increases the CQC by 29.9% and reduces the specific cement consumption by 24.6% in comparison with the control samples. It is shown that a balanced combination of additives improves the performance properties of concrete, contributing to resource saving and reducing the environmental load.

Keywords: fine-grained concrete, substandard materials, complex modifying admixture, structural quality coefficient, specific cement consumption, mathematical planning of the experiment, resource saving, compressive strength

The article reviews and analyzes the methods of electrical treatment of hardening mixture with direct current, high-voltage field and non-uniform field, used in construction technology during the construction of buildings from monolithic concrete and reinforced concrete to protect forming surfaces from adhesion to hardening concrete, reinforcement of reinforced concrete structures from corrosion, cleaning of forming surfaces, etc.

Keywords: concrete mixture, physical, mechanical and technological properties of concrete, electrical processing, monolithic structures, precast reinforced concrete structures

The article provides an analysis of the architectural aspects of sports and recreation buildings and structures of universities in the Southern Federal District (Rostov Region, Krasnodar Territory, Republic of Crimea) and Stavropol Territory, united in the framework of the study by the concept of "South of Russia". The classification of sports and recreation facilities at the universities under study is carried out. Some functional, spatial and planning features of sports buildings and facilities, sports and recreation facilities, student sanatoriums, sanatoriums, student polyclinics at universities in the South of Russia have been identified, which can serve as a basis for developing principles of architectural modernization of these facilities.

Keywords: architectural features, university sports and recreation facilities, student polyclinic, student health resort, university infrastructure, South of Russia

The area where the floor is supported by a column is one of the most critical areas in buildings with a load-bearing system made of monolithic reinforced concrete. This is due to the high concentration of forces and, as a consequence, the densest reinforcement within the floor. When designing such structures, the problem of initially setting the thickness of the floor from the conditions of punching arises, without yet having a spatial calculation scheme that allows correctly determining the bending moments in the node working on punching. In the article, conditions are obtained for the necessary and sufficient thickness of floors with and without transverse reinforcement depending on the punching force F in the column.

Keywords: punching shear resistance, flat reinforced concrete slab, static load

The technology of ensuring accident-free operation of tunnels and underground structures is presented. An analysis of various technical solutions currently used in the open and semi-closed method of constructing underground structures for transport purposes is given. Methods for reducing the occurrence of emergency situations during the operation of tunnels and underground structures are proposed.

Keywords: building structures, metal structures, energy facilities, stress-strain state, technical expertise

The effect of nanosized boehmite microadditives on the surface properties of carboxymethyl cellulose polymer suspensions with aluminum microparticles was studied. It was found that with an increase in the boehmite content from 0.10 g to 0.20 g in suspensions, the surface tension of liquid systems increases by 8 mN/m. The contact angle of the liquid composition wetting the fluoroplastic surface also increases: from 62 ° to 85 °. It is shown that on a low-energy fluoroplastic surface, boehmite nanoparticles act as a pore-forming agent, leading to the generation of ordered cells on the surface of films formed from suspensions. The morphology of the initial powders and the formed films with cells was studied using optical and electron microscopy. It was established that ordered cells of similar size with dimensions of ratio 500 to 1,000 microns in size are formed with a boehmite content in the base composition of 0.15 g.

Keywords: carboxymethyl cellulose, aluminum powder, nanosized boehmite, suspension, surface tension, wetting angle, pore

The article examines the research topic of non-stationary retail facilities in Gukovo. The relevance of this topic is due to the crisis state of the urban environment, the integration of small temporary buildings into the urban fabric of the city. Important integration factors are aesthetics, functionality, interaction with the environment, and innovation. The purpose of the study is to develop recommendations for the development of the NTO of the city of Gukovo, as an environmental system that performs the functions of updating and structuring the urban environment in the direction of implementing programs for the advanced development of former single-industry towns and improving their quality of life.

Keywords: non-stationary retail facilities, factors, innovative solutions, environmental systems, design code, single-industry town, models, architectural and design update

The work deals with the study of the reliability of welded joints of pipeline systems, provided that there are various types of defects in the welds: external undercuts, internal undercuts, pores. Finite element modeling of welded joints was performed and the intensity of operating stresses was calculated using the Ansys application software package. Stress concentration coefficients are calculated and the probability of trouble-free operation of welded joints in the presence of the considered defects is estimated. The data obtained can be used in the design and optimization of pipeline system elements.

Keywords: modeling, reliability indicators, welded joint of piping systems