bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cement concrete modified by fine-dispersed anionactive bitumen emulsion for road construction
Authors: Garipov Aidar , Makarov Dmitry , Khozin Vadim , Stepanov Sergei , Ayupov Damir 
Published: August 2020

Abstract
Cement concretes are strong and able to resist external adverse environmental factors, have an increased water absorption and, as a result, insufficient frost resistance and deformability. Therefore, wide use of cement concrete in road construction is limited. Modification of road cement concrete with anionactive bitumen emulsions is a current and promising solution. By introducing small concentrations of bitumen emulsions into cement concrete, one gets a material with the basic properties of cement concrete and the properties of asphalt concrete. Rigid crystallization bonds formed as a result of cement hydration are dominantly present in cement systems, while coagulation type bonds with adhesive properties bitumen prevail in asphalt systems. Depending on the quantitative relationship between these bonds, the deformability of concrete tends to change. The main technological and operational properties of the resulting road cement concrete were investigated. Cement concrete was bituminized by introducing the anionic bitumen emulsions into the concrete mixture (from 0.5% to 8.0% of cement weight), which allowed increasing technological properties of concrete mixture and the performance properties of hardened concrete. This increases mobility, improves deformability of hardened concrete, increases its abrasion resistance, water resistance, frost resistance, reduces shrinkage without reducing the strength properties of road concrete.
An additive for autoclaved aerated concrete on quick-extinguishing lime
Authors: Kuznetsova Galina , Morozova Nina 
Published: August 2020

Abstract
Slow-extinguishing lime is used in the production of autoclave hardening aerated concrete. If the production of aerated concrete is arranged in parallel with the production of silicate brick, then the lime will be quick-extinguishing. In this connection, the present paper considers the possibility of using quick-extinguishing lime and waste products from silicate brick. A significant content of quartz (over 75%) in the composition of silicate brick makes it possible to use it in a ground form as an analogue of ground sand. Also, the paper has established a reduction in the setting time of cement and an increase in the strength of autoclaved concrete. However, slip-like additives reduce the mobility of the mixture and increase its water demand. The deterioration of processing characteristics is observed when ground waste is introduced into the sand slurry of aerated concrete mixture. Therefore, a complex additive based on the waste of silicate brick, plasticizer and gypsum stone has been proposed, which allows for expanding the scope of application of quick-extinguishing lime, reducing the water demand of the mixture without reducing mobility and increasing the strength of the finished product.
Reengineering of manufacturing processes in the construction organization
Authors: Mavlioutov Ramil , Belyaev Mikhail , Borisova Kristina 
Published: August 2020

Abstract
The introduction of advanced technological solutions in modern conditions becomes a paramount problem for industrial enterprises. In relation to Russia where the digitalization of the construction industry is proclaimed, the priority of introducing of information technologies is forming a new goal for the country, the one to join the global process of a new technological revolution. This cannot be achieved without a fundamental re-planning of the key production processes of the construction enterprise. We consider this procedure as “reengineering of production processes”. An approach to assess the validity of the reengineering of production processes of a construction enterprise, implemented with the involvement of an engineering company, is presented. The benefits due to the involvement of an engineering company are given. The proposed approach allows calculating the reengineering console, which makes it possible to make an informed decision on the implementation of the reengineering project by both the enterprise and the engineering company. This study can be demanded by both potential participants in the process, and scientists who conduct research in this area.
The improvement of construction industry innovative potential through the creation of a cluster
Authors: Zagidullina Gulsina , Ivanova Rufina , Nugumanova Guzel , Sirazetdinov Rustem , Zaripova Anna 
Published: August 2020

Abstract
The study is devoted to the analysis of the innovative potential of enterprises in the construction industry. The creation of an effective cluster increases the country’s innovative potential, as well as the economic indicators of production activity of the construction industry enterprises. The investment and construction cluster will help to create the competitive advantages that the construction industry enterprises involved into it have. The study considers stages and principles of the investment and construction cluster formation. We propose an algorithm for assessing the innovative potential of the investment and construction cluster based on the results of a SWOT analysis. The study assesses the innovative potential of the investment and construction cluster. Based on multiple correlation and regression analysis, we developed an equation for the dependence of the gross regional product on the system of indicators characterizing the innovation activity of the investment and construction cluster.
The optimization of the number of reinforcing bars in the slabs in grasshopper and integration with TEKLA and LIRA-SAPR
Authors: Nasybullin Ranel , Akhmadiev Fail , Bakhareva Olga 
Published: August 2020

Abstract
The article reveals the interoperability of several software products. The concept of interoperability of software products is supported by OpenBIM standards, providing a project with a reliable platform and open source code for integrating BIM models with other environments. It is possible to exchange data between software systems, not only through the IFC format, in the article we will consider other means of information exchange. An algorithm is formed that optimizes the number of the number of reinforcing bars in the slabs. The optimization is possible due to the interaction of different software systems through plugins.
Application of catalytic destruction methods in wastewater treatment
Authors: Andreeva Svetlana 
Published: August 2020

Abstract
The objective of the present work is to study the process of removing wastewater pollutants of peroxide nature chemical compounds by catalytic destruction method. To achieve this the following tasks were solved: a) to study qualitative and quantitative composition of wastewater, as well as composition stability over time; b) to study the possibility of applying methods of peroxide catalytic destruction in the wastewater medium; c) to determine optimal conditions for peroxide catalytic destruction; d) to determine the possibility of such wastewater purification at biological treatment plants. As a result of the research, it was established that wastewater has a variable quantitative composition of pollutants both at the moment of their formation and over time, which significantly complicates selection of reagents for peroxide catalytic destruction. Optimal conditions for catalytic decomposition of peroxides in the wastewater medium were determined. Thermal decomposition of peroxide compounds in the presence of iron-ion catalyst-Fe(II) was studied. The proposed methods of peroxide destruction allow achieving a high degree treatment of wastewater from these components, and to use biological methods of decontamination in further post-treatment of effluents.
Determination of the main technical reasons for the fall of pile driving machine near the slope of the foundation pit
Authors: Khuziakhmetov Rustam , Nurieva Daniya 
Published: August 2020

Abstract
The study was conducted to determine the main technical reasons for the fall of the pile-driving machine that occurred when driving-in of piles in the immediate vicinity of the slope.
As a result, slope stability of the soil in the process of driving-in of reinforced concrete piles near the slope crest of the underlying pit was determined. The calculations were performed using the following four well-known methods: methods of Fellenius, Krey, Terzaghi, Chugayev. The loss of stability of the soil was caused by the imbalance of external and internal forces (the presence of construction equipment and stored materials near the slope and its dead load). The calculations were performed for six loadcases of the earth wall. The article presents in detail the case in which the slope collapsed.
The importance of the results for the construction industry lies in the need for a comprehensive study of safety issues at all stages of the life cycle of construction projects, starting with the preparation of a design assignment, surveys, design, construction, operation, repair, reconstruction, etc.
Analysis of the lateral stability of the pile-driver SP-49
Authors: Khuziakhmetov Rustam , Sakhapov Rustem , Zemdikhanov Minsur , Andreeva Svetlana 
Published: August 2020

Abstract
This study aims to exclude the possibility of pile driver capsizing due to exceeding slope of the construction site surface.
The paper determinates the reasons for the violation of the requirements of urban planning legislation and regulatory and technical documentation, which results in a pile driver capsizing. The authors calculated the center of gravity of the pile driver and its lateral stability during the preparation of piles for driving and the driving itself.
The significance of the results for the construction industry lies in the need to increase the level of safety when performing pile work and taking into account the actual conditions of the site in the places of their implementation. At the investigated construction site, the slope of the construction site did not exceed a guaranteed safe value 3°.
Pressure loss reduction in ventilation ducts by shape optimization of the removable profiled components
Authors: Malanichev Igor , Akhmadiev Fail 
Published: August 2020

Abstract
Reduction of pressure loss in ventilation systems can be achieved by changing the shape of the airflow region and smoothing the boundary surfaces. The installation of special profiling components inside a straight shaped part of ventilation duct is the simplest way to reduce the coefficient of local resistance and pressure loss. For the best result under given conditions, the shape optimization problem must be formulated and solved. In this paper, we use the open source code software and numerical methods to study the optimal-shaped drag reduction components in elbow ventilation ducts. Computational Fluid Dynamics is used to predict the flow fields and the drag reduction effect. After the validation of flow model against existing experimental results, a detailed study has been conducted to shape optimization of removable profiled components. The optimization problem is parameterized by a small number of structural variables, which are the coordinates of the control points of the splines that form the contours of the flow region. Total pressure loss coefficient is selected as the objective function for optimization. A genetic algorithm is used as an optimization method. The results reveal that the removable profiled drag reduction component can reduce the resistance in ducts by 60%-80%.
Solution of conjugate problem in a conical coil heat exchanger
Authors: Krutova Iraida , Zolotonosov Yakov 
Published: August 2020

Abstract
Today, coil heat exchangers are widely used in various industries. A large number of works have been published devoted to the study of the characteristics of helical coil heat exchangers. According to the authors, conical coil heat exchangers have higher efficiency compared to helical ones. The article investigates the influence of the geometric parameters of conical coil heat exchangers on their effectiveness. The object of study is a conical coil heat exchanger with different tube diameters of the inner coil (di = 13, 15, 17 mm) and various number of turns (N = 6, 10, 14). Modeling was carried out in the Ansys Fluent software package. For each combination of the parameters, data were obtained on the temperature and velocity of the coolant at the outlet. It was found that a change in the number of turns by a factor of 2.3 leads to an increase in the temperature of the heated fluid by an average of 9.7 ° C. The effect of changing the diameter of the inner coil is non-linear.
CFD-modeling of flow in confluence nodes of ventilation units of multi-storey buildings
Authors: Shopayeva Aiman , Safiullin Rinat 
Published: August 2020

Abstract
This paper considers the flow characteristics in ventilation units, which are used in natural ventilation systems of multi-storey residential buildings. Three configurations of ventilation units were considered: standard with straight walls, with a beveled wall and with a guide insert. For each configuration, three sizes of bypass hole at the confluence of flows from the satellite channel and the collection channel were considered. The problem was solved numerically using the CFD Flow3d software package.
It was established that for a ventilation unit with a straight wall in the satellite channel, the formation of separation zones that are significant in width and length at the confluence node is typical. The length and width of separation zones affecting the resistance of ventilation unit as a whole increases with the enlarging of the bypass hole size in the collection channel and decreases when using a beveled end wall, that directs the flow upstream of the exhaust air. For the considered geometries of confluence nodes of ventilation units, the relationships between local resistance coefficients and velocity (Reynolds number) in the collection channel are obtained.
Formation and motion of droplets in gas cleaning devices with porous rotating atomizers
Authors: Safiullin Rinat , Kareeva Juliya 
Published: August 2020

Abstract
This paper presents the study of characteristics of porous rotating nozzles recommended for use in gas cleaning devices. The influence of geometrical and technological parameters of atomizer on the size of droplets and the trajectory of their motion is investigated theoretically and experimentally.
To determine the droplet size when it is detached from the spherical granule of porous rotating atomizers (PRA), the simulation in the Flow3D program was used. A model for calculating the droplets trajectories when spraying a liquid with the help of porous rotating nozzles is compiled. The model is based on a joint solution of equations of droplet motion in a centrifugal field and evaporation of droplets.
The relationship between the volume of separating droplets and the size of granules of porous material and the geometry of atomizer is obtained. The regularities of droplet motion in cylindrical devices with porous rotating atomizers are established depending on the droplets sizes and parameters of the cross-flow. The relationship between parameters of droplets’ trajectory and their volume is recommended for calculating the geometry of the spray torch of PRA in gas cleaning devices.
Two-dimensional flow movement in the area of protective regulatory structures
Authors: Bazarov Dilshod , Norkulov Bekhzod , Vokhidov Oybek , Uljaev Farokhiddin , Ishankulov Zokhidjon 
Published: August 2020

Abstract
The article discusses the results of numerical studies of the flow movement with a sharp change in the parameters of the channel. Basically, the results of the study using the system of two-dimensional equations of hydrodynamics-Saint-Venant are analyzed. The divergent form of two-dimensional equations describing the movement of a water stream at a site of regulation of a channel by protective and regulatory dams is given. The influence of the length step on the results of numerical experiments is investigated numerically. Graphs of the time variation of the longitudinal velocity component behind the sudden double expansion of the channel are compiled. The flow was unsteady all the time and had the character of stationary pulsations, and the finer the grid, the richer the spectrum of these pulsations. It was noted that in numerical calculations, the time step in the calculations was always much less than the minimum pulsation period, therefore, these pulsations were not associated with difference oscillations that can arise when approximating by central differences. It is concluded that, according to the authors from the following and the present work, they collectively show that the pulsations on different grids differ significantly, the average values of the velocities are close, and thereby the solution for the average values is well converged, this shows that the pulsations are a property source equations of Saint-Venant. The applicability of the numerical model, consisting of two-dimensional shallow water equations, the vector equation of momentum conservation and the scalar equation of mass conservation, in description the flow with the presence of circulation zones, which is typical when water flows are constrained by protective-regulatory structures. In this case, the solution pulsates around a certain average value, and the average length of the circulation zone behind the sudden expansion of the open flow is in good agreement with the laboratory experiments of G.L. Mazhbits.
Oil heater with high temperature heat transfer agent
Authors: Faizov Azat , Sadykov Renat 
Published: August 2020

Abstract
The work is devoted to the development of a block oil heater with a capacity of 40 t/h when it is heated from 10 to 60°C. The fuel used is natural or associated petroleum gas.
As a result of the analysis of heat-technical calculations according to the aggregate characteristics, a high temperature organic heat transfer agent, thermal oil, was adopted as a secondary heat transfer agent.
A block oil heater with a thermo-oil boiler unit is designed, consisting of two modules: a heat generation module and a heat transfer module. The description and operation of the heater with a thermo-oil boiler unit is presented.
The significance of the results obtained for the construction industry lies in the fact that this heater is able to operate in heating or hot water supply mode, when the automation system is switched to the appropriate installations. The developed block oil heater, in comparison with existing analogues, has the following advantages: it has compact dimensions and high specific power, the control unit is equipped with an automated microprocessor complex, and the modular design allows it to be transported by any type of transport.
A modified design-analog method of teaching geometry and graphics as a means of integrating of training and design activities of future architects
Authors: Liudmila Danchenko , Nail Tuktamyshov 
Published: August 2020

Abstract
The strategy of teaching orthogonal and other projections, as well as the basics of geometry formation of the future architect is based on the practical orientation of the teaching process and is based on a modified design-analog method. Possibilities of the building industry show an urgency of research and realization of methods of shaping geometry in a course of descriptive geometry. The purpose of the study is to develop technology for the formation of design skills of shaping, based on the proposed modified design and analogue method. The object of research is geometrical and graphic training of students pursuing the degree in Architecture or Design of architectural environment. The subject of study is the technology of training of shaping in the course of descriptive geometry and based on a modified design-analog method. The characteristic feature of this method is its connection with the architectural practice of both educational and professional. The methodological basis for its application is the method of creating of the architectural form of an object. The workshop has been tested and allowed to consider a set of actions and operations, their sequence.
Territorial (re)branding as a factor in the sustainable development of the city
Authors: Ponomarev Evgeny , Ivshin Konstantin 
Published: August 2020

Abstract
As of this date, territorial branding is a key tool to increase the attractiveness of the territories of cities, districts, settlements. By dint of branding, the competition between territories for resources – financial, economic, labor, demographic – is intensified. Territorial branding is a marketing strategy to increase the competitiveness of cities, regions, settlements, revealing the potential of the selected territory and, thus, expanding its capabilities and creating a basis for sustainable development of a city.
Presently, the main achievement of territorial branding is to stimulate the social activity of citizens. Growing interest from different social and age groups of population to creation of an urban brand contributes to sustainable development of cities. The authors consider territorial (re)branding as a multidimensional design algorithm including architectural and design solutions as a single strategic concept. The indicated approach to the formation of a comprehensive concept is a sequence of proposed procedures performed in a certain order, according to the following requirement: predesign analysis; creation of the conceptual model of development; implementation of design documentation; the formation of a high-quality visual-perceived environment of the urban area.
Financial stimulation as factor of competitiveness rise of residential developers
Authors: Barinov Valerij , Vasil’chikova Ekaterina , Potekhin Igor 
Published: August 2020

Abstract
The paper deals with the analysis of scientific works about resettlement from dilapidated housing in Voronezh. Authors offered the system of financial stimulation for construction projects, which are based on government-private partnership. The financial stimulation is based on different mechanisms and its purpose is to rise influence on financial interests of participants investment-construction projects. This is solution to the problem of dilapidated housing and developer’s competitiveness rise. The solution has two instruments: first is tax stimulation and the second is rise of program efficiency by using financial resources. Preliminary evaluation has shown that algorithm of design and introduction allows achieving the following results: decrease tax load, decrease investor’s need in finance, and transparency rise and quality of finance control rise. The risk exists because non-purpose usage of developer’s income at the best case in any period leads to losing the opportunity of finalizing construction object, or in the worst case – bankruptcy. Project financing with current mechanism helps to decrease expenditures and to rise competitiveness of residential developers.
Environmental activities of a petrochemical company as a sustainable factor of the city and region
Authors: Mironova Margarita , Romanova Anna , Evgeniya Irina , Galeeva Irina , Egorov Danila , Akhmetova Alena 
Published: August 2020

Abstract
The paramount objective of modern society is to preserve a livable environment for generations to come. In addition to the need to restore the impaired qualities of the environment, measures also must be taken to preclude environmental disasters from happening both now and in the future. The formation of a balanced regional system of cities is hampered by the deterioration of the environmental situation and a decrease in environmental quality indicators. The concentration of industrial sites and vehicles represents one of the biggest adverse anthropogenic factors which stems from the human impact on the environment. Growing industrial clusters and the rising number of vehicles in large cities result in a critical environmental situation. Environmental monitoring measures, once introduced, will facilitate the sustainable development of urban areas and the economy of the region.