Pub Date : 2023-06-26DOI: 10.34031/2071-7318-2023-8-8-50-71
N. Vasilenko, E. Potekina, Yu. V. Pogorelova
This paper considers determining the place and role of creative industries and creative residencies in the general system of public social-cultural infrastructure and identifying the peculiarities of forming a network of creative residencies in Russia. It is demonstrated that the systemic appearance of a network of creative residencies in the Russian Federation in the early 2000s mostly as a result of reconstruction /renovation of industrial heritage objects and public cultural services objects (clubs, movie theaters, museums etc.) was predetermined both by the necessity of depressed urban areas renewal and by modernization of cultural and social public services’ system in general. Modernization of the so-called «social infrastructure» for the population is associated with the large-scale information technologies implementation, the increasing aestheticization of everyday processes and the ever-growing involvement of art and creative components into economic values production. An overview of modern objects of the country-wide creative residencies network in Russia is presented. It is demonstrated that the so-called «creative industries», which are the core sphere of activity of art residencies, are located at the joining point of three types of the community subsystem’s activities: cultural-and-entertainment, trade-and-service and training-and-educational. The author’s models, describing the role of creative industries and creative residencies in the social infrastructure from the perspective of system approach, are presented. The functional structure of any architectural objects of social and cultural designation, which would reveal their systemic essence and composition, is substantiated.
{"title":"THE SYSTEM BASIS OF FORMING A NETWORK OF CREATIVE RESIDENCIES IN RUSSIA","authors":"N. Vasilenko, E. Potekina, Yu. V. Pogorelova","doi":"10.34031/2071-7318-2023-8-8-50-71","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-8-50-71","url":null,"abstract":"This paper considers determining the place and role of creative industries and creative residencies in the general system of public social-cultural infrastructure and identifying the peculiarities of forming a network of creative residencies in Russia. It is demonstrated that the systemic appearance of a network of creative residencies in the Russian Federation in the early 2000s mostly as a result of reconstruction /renovation of industrial heritage objects and public cultural services objects (clubs, movie theaters, museums etc.) was predetermined both by the necessity of depressed urban areas renewal and by modernization of cultural and social public services’ system in general. Modernization of the so-called «social infrastructure» for the population is associated with the large-scale information technologies implementation, the increasing aestheticization of everyday processes and the ever-growing involvement of art and creative components into economic values production. An overview of modern objects of the country-wide creative residencies network in Russia is presented. It is demonstrated that the so-called «creative industries», which are the core sphere of activity of art residencies, are located at the joining point of three types of the community subsystem’s activities: cultural-and-entertainment, trade-and-service and training-and-educational. The author’s models, describing the role of creative industries and creative residencies in the social infrastructure from the perspective of system approach, are presented. The functional structure of any architectural objects of social and cultural designation, which would reveal their systemic essence and composition, is substantiated.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85518183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-9-18
N. Lukutcova, E. Karpikov, E. Gornostaeva, G. Soboleva
The article considers the optimization of the content of the components of the additive of stabilized highly dispersed wollastonite using a developed and patented computer algorithm for finding extreme coordinates of the dependencies of the mechanical characteristics of fine-grained concrete Extr.sce and Interp.sce based on the Scilab engineering and scientific computing environment. The developed programs allow determining the best combination of components and technological parameters for obtaining an additive to identify the optimal value of the desired indicator of the final characteristics of fine-grained concrete. The search for the maximum value of the strength indicators of fine-grained concrete is performed depending on the combination of the initial components of the modifier based on highly dispersed wollastonite, as well as the time of their ultrasonic dispersion with the output of visual data processing models in the form of contour and 3d graphs of the interpolation surface. As a result of the simulation, it is found that the additive shows the most effective result with a wollastonite content of 5 g/l, in which a modifier M with a concentration of 2.1 ml/l is used as a suspension stabilizer, while the ultrasonic dispersion time is 5 minutes. The developed additive of optimal composition contributes to the production of modified fine–grained concrete with a bending strength of 6.8 MPa and compression strength of 58.5 MPa
{"title":"OPTIMIZATION OF THE COMPOSITION OF THE ADDITIVE OF STABILIZED HIGHLY DISPERSED WOLLASTONITE USING A COMPUTER ALGORITHM FOR FINDING EXTREMES","authors":"N. Lukutcova, E. Karpikov, E. Gornostaeva, G. Soboleva","doi":"10.34031/2071-7318-2023-8-5-9-18","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-9-18","url":null,"abstract":"The article considers the optimization of the content of the components of the additive of stabilized highly dispersed wollastonite using a developed and patented computer algorithm for finding extreme coordinates of the dependencies of the mechanical characteristics of fine-grained concrete Extr.sce and Interp.sce based on the Scilab engineering and scientific computing environment. The developed programs allow determining the best combination of components and technological parameters for obtaining an additive to identify the optimal value of the desired indicator of the final characteristics of fine-grained concrete. The search for the maximum value of the strength indicators of fine-grained concrete is performed depending on the combination of the initial components of the modifier based on highly dispersed wollastonite, as well as the time of their ultrasonic dispersion with the output of visual data processing models in the form of contour and 3d graphs of the interpolation surface. As a result of the simulation, it is found that the additive shows the most effective result with a wollastonite content of 5 g/l, in which a modifier M with a concentration of 2.1 ml/l is used as a suspension stabilizer, while the ultrasonic dispersion time is 5 minutes. The developed additive of optimal composition contributes to the production of modified fine–grained concrete with a bending strength of 6.8 MPa and compression strength of 58.5 MPa","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87593142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-105-115
L. Bannikova
This Article considers ways of optimization of street cross-section profiles in big cities in order to create comfortable urban environment. Importance of the topic has arisen from reconsideration of the role of street-and-road networks in cities, and their transformation from zones of transit into public space and city-life concentration zones. The article presents an analysis of regulatory documents and research works on design and layout of cross-section profile elements. It includes results of field survey and urban development analyses of Yekaterinburg city streets carried out with the purpose to identify problems of current street-and-road networks in major cities and actual street space distribution among users. The Article shows key users of the city streets, as well as requirements to cross-section profile elements. The proposed approach to street-space reorganization offers assignment of ‘user importance index’, which determines the cross-section profile elements. The ‘user importance index’ characterizes use of a street section by a specific user. The criteria by which the «index of importance» of each group of street section users is determined are described. The concluding part of the Article describes one of the cross-section profiles developed for Yekaterinburg using the given approach. It also includes approbation of the mentioned research in the course of work on Standards for Complex Street-and-Road Network Improvement in Yekaterinburg.
{"title":"SPATIAL ORGANIZATION OF A STREET SECTION DEPENDING ON THE NATURE OF USE","authors":"L. Bannikova","doi":"10.34031/2071-7318-2023-8-5-105-115","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-105-115","url":null,"abstract":"This Article considers ways of optimization of street cross-section profiles in big cities in order to create comfortable urban environment. Importance of the topic has arisen from reconsideration of the role of street-and-road networks in cities, and their transformation from zones of transit into public space and city-life concentration zones. The article presents an analysis of regulatory documents and research works on design and layout of cross-section profile elements. It includes results of field survey and urban development analyses of Yekaterinburg city streets carried out with the purpose to identify problems of current street-and-road networks in major cities and actual street space distribution among users. The Article shows key users of the city streets, as well as requirements to cross-section profile elements. The proposed approach to street-space reorganization offers assignment of ‘user importance index’, which determines the cross-section profile elements. The ‘user importance index’ characterizes use of a street section by a specific user. The criteria by which the «index of importance» of each group of street section users is determined are described. The concluding part of the Article describes one of the cross-section profiles developed for Yekaterinburg using the given approach. It also includes approbation of the mentioned research in the course of work on Standards for Complex Street-and-Road Network Improvement in Yekaterinburg.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75823001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-116-125
I. Duyun, P. Kabalyants, S.V. Zuev, T. Duyun, D. I. Malyshev
The article presents a model, tools, methodology and results of identifying special provisions when planning the movement of a parallel manipulator such as the Gough-Stewart platform. Special positions are understood as positions having geometric uncertainty, singularity. Singular positions are estimated by analyzing the Jacobian matrix using its singular value decomposition. The calculation of the Jacobi matrix and its singular values is performed using special libraries of the high-level Python programming language. The presence of special positions in the workspace is analyzed using the dexterity index, which characterizes the ratios of the singular values of the singular value decomposition of the Jacobian matrix. A series of computational experiments are carried out to calculate the dexterity index, identify and analyze special positions in the working area. The results of a computational experiment for various design versions of the platform, which differ in the ratio of the radii of the movable platform and the fixed base, are presented. The analysis of the characteristic features of the formation of singularity zones in their working zones is carried out and design options are identified that have the maximum dexterity index of the working area. The presented approach is applicable in the framework of the development, modernization, optimization of structural elements of parallel structure manipulators.
{"title":"DETERMINATION OF THE DEXTERITY INDEX AND DETECTION OF SPECIAL POSITIONS OF THE PARALLEL MANIPULATOR","authors":"I. Duyun, P. Kabalyants, S.V. Zuev, T. Duyun, D. I. Malyshev","doi":"10.34031/2071-7318-2023-8-5-116-125","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-116-125","url":null,"abstract":"The article presents a model, tools, methodology and results of identifying special provisions when planning the movement of a parallel manipulator such as the Gough-Stewart platform. Special positions are understood as positions having geometric uncertainty, singularity. Singular positions are estimated by analyzing the Jacobian matrix using its singular value decomposition. The calculation of the Jacobi matrix and its singular values is performed using special libraries of the high-level Python programming language. The presence of special positions in the workspace is analyzed using the dexterity index, which characterizes the ratios of the singular values of the singular value decomposition of the Jacobian matrix. A series of computational experiments are carried out to calculate the dexterity index, identify and analyze special positions in the working area. The results of a computational experiment for various design versions of the platform, which differ in the ratio of the radii of the movable platform and the fixed base, are presented. The analysis of the characteristic features of the formation of singularity zones in their working zones is carried out and design options are identified that have the maximum dexterity index of the working area. The presented approach is applicable in the framework of the development, modernization, optimization of structural elements of parallel structure manipulators.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79775084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-62-70
S. Merkulov, S. Esipov, G. Golikov
The sources available for research and analysis, including the current regulatory documents, contain a number of methods for determining and accounting for the physical wear of buildings and structures, however, many of them either contain too average data or contradict each other. This article discusses the developed approach to assessing the physical deterioration of residential buildings in terms of the frequency of restoration measures and major repairs. The necessity of improving the approach to monitoring the technical condition of residential buildings in order to optimize the costs of maintaining a working condition is described. The cases of various options for the application of decision-making policy in the field of operation of residential buildings are considered. A method for determining the dependence of the physical wear of a building on the service life is proposed. The cost of performing restoration work based on experimental data is estimated. The characteristic sections of the dependence curve "service life – physical wear" are determined with the analysis of factors and prerequisites for making managerial decisions regarding the capital construction object. Mathematical modeling is performed based on the data obtained. This allows developing recommendations regarding the timing and scope of restoration work during repairs at the operational stage.
{"title":"ON THE FORMATION OF A METHODOLOGY FOR OPTIMIZING THE PLANNING OF CAPITAL REPAIRS OF RESIDENTIAL BUILDINGS AT THE STAGES OF OPERATION AND REPAIR","authors":"S. Merkulov, S. Esipov, G. Golikov","doi":"10.34031/2071-7318-2023-8-5-62-70","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-62-70","url":null,"abstract":"The sources available for research and analysis, including the current regulatory documents, contain a number of methods for determining and accounting for the physical wear of buildings and structures, however, many of them either contain too average data or contradict each other. This article discusses the developed approach to assessing the physical deterioration of residential buildings in terms of the frequency of restoration measures and major repairs. The necessity of improving the approach to monitoring the technical condition of residential buildings in order to optimize the costs of maintaining a working condition is described. The cases of various options for the application of decision-making policy in the field of operation of residential buildings are considered. A method for determining the dependence of the physical wear of a building on the service life is proposed. The cost of performing restoration work based on experimental data is estimated. The characteristic sections of the dependence curve \"service life – physical wear\" are determined with the analysis of factors and prerequisites for making managerial decisions regarding the capital construction object. Mathematical modeling is performed based on the data obtained. This allows developing recommendations regarding the timing and scope of restoration work during repairs at the operational stage.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83903124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-71-81
S. Semencov, A. Mihaylov
The paper considers previously unexplored urban planning and intangible components (aspects) of the subject of protection of cultural objects. From the general analysis of the phenomenon of object preservation through the subject of protection, the authors consistently reveal the features of this mechanism, the evolution of its methodological support and structure. The least studied components are identified. The authors analyze the international analogue of the method of preserving the features of cultural heritage objects through the identification of its most outstanding features. The method of identifying and preserving outstanding universal value enshrined in the "Convention on the Protection of the World Cultural and Natural Heritage" is widely used in various countries of the world, both literally and with different interpretations. Based on the results of studies of the world and domestic experience, the article offers systematization and methods of identification and fixation of urban planning aspects. The components and structure of intangible aspects are revealed. In the methodology for determining urban planning aspects, they are divided into determining the role of an object in the historical environment ("view of the object") and determining the role of the environment in preserving the features of the object ("view from the object"). The paper considers the necessary legal changes to take into account the studied aspects in order to fully preserve the historical environment.
{"title":"URBAN PLANNING AND INTANGIBLE ASPECTS OF THE SUBJECT OF PROTECTION OF CULTURAL HERITAGE OBJECTS IN THE HISTORICAL ENVIRONMENT OF ST. PETERSBURG","authors":"S. Semencov, A. Mihaylov","doi":"10.34031/2071-7318-2023-8-5-71-81","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-71-81","url":null,"abstract":"The paper considers previously unexplored urban planning and intangible components (aspects) of the subject of protection of cultural objects. From the general analysis of the phenomenon of object preservation through the subject of protection, the authors consistently reveal the features of this mechanism, the evolution of its methodological support and structure. The least studied components are identified. The authors analyze the international analogue of the method of preserving the features of cultural heritage objects through the identification of its most outstanding features. The method of identifying and preserving outstanding universal value enshrined in the \"Convention on the Protection of the World Cultural and Natural Heritage\" is widely used in various countries of the world, both literally and with different interpretations. Based on the results of studies of the world and domestic experience, the article offers systematization and methods of identification and fixation of urban planning aspects. The components and structure of intangible aspects are revealed. In the methodology for determining urban planning aspects, they are divided into determining the role of an object in the historical environment (\"view of the object\") and determining the role of the environment in preserving the features of the object (\"view from the object\"). The paper considers the necessary legal changes to take into account the studied aspects in order to fully preserve the historical environment.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77685170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-42-51
Y. Elistratova, A. Seminenko, V. Uvarov, O. Scherbinina
The reliability and efficiency component of the 3rd generation heat and power network is characterized by the use of heat exchange devices, namely the plate type. Its main function is to heat the coolant for the needs of hot water supply and heating systems. However, the peculiarities of the chemical composition of the heat carrier cause contamination of heat exchangers in the form of scale layers on the heating surfaces. The process of scale formation on the plates of heat exchangers is one of the key factors affecting the failure of equipment and an increase in the energy intensity of heat distribution points, which leads to a decrease in the quality of services provided and an increase in financial costs in the field of heat supply. In the course of the study, by summarizing the known data, a sequence is formed for calculating the transport costs for the operation of plate heat exchangers under various conditions of scale formation. At the same time, the influence of scale thickness on the total cost of pumping one square meter of coolant is taken into account. This allows comparing transportation costs and the cost of removing scale from heating surfaces (according to the accepted cleaning method) depending on the thickness of the salt-forming layer and cleaning periods. The results of the study confirm the feasibility of regular monitoring of the thickness of salt-forming layers in plate heat exchangers to reduce operating costs for pumping the coolant.
{"title":"THE ECONOMIC ASPECT OF THE SCALE-FORMING DIGNOSTICS LAYERS IN PLATE HEAT EXCHANGERS","authors":"Y. Elistratova, A. Seminenko, V. Uvarov, O. Scherbinina","doi":"10.34031/2071-7318-2023-8-5-42-51","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-42-51","url":null,"abstract":"The reliability and efficiency component of the 3rd generation heat and power network is characterized by the use of heat exchange devices, namely the plate type. Its main function is to heat the coolant for the needs of hot water supply and heating systems. However, the peculiarities of the chemical composition of the heat carrier cause contamination of heat exchangers in the form of scale layers on the heating surfaces. The process of scale formation on the plates of heat exchangers is one of the key factors affecting the failure of equipment and an increase in the energy intensity of heat distribution points, which leads to a decrease in the quality of services provided and an increase in financial costs in the field of heat supply. In the course of the study, by summarizing the known data, a sequence is formed for calculating the transport costs for the operation of plate heat exchangers under various conditions of scale formation. At the same time, the influence of scale thickness on the total cost of pumping one square meter of coolant is taken into account. This allows comparing transportation costs and the cost of removing scale from heating surfaces (according to the accepted cleaning method) depending on the thickness of the salt-forming layer and cleaning periods. The results of the study confirm the feasibility of regular monitoring of the thickness of salt-forming layers in plate heat exchangers to reduce operating costs for pumping the coolant.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79236384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-19-34
M. Vysotskaya, O. N. Kindeev, A. Kurlykina, M. Kabalin
Bitumen is a complex, multicomponent colloidal dispersed system based on the interaction of asphaltenes (phases) and maltenes (medium). In the absence of external influence, such a system is in a relatively stable state. Any external phenomenon causes an equilibrium state of the colloid and initiates Ysol aggregation, accompanied by a qualitative change in properties. Thus, a quantitative change in the phase of a colloid entails a qualitative change in its state. One of the possible options for internal control of structure formation and bitumen index is the application of rheological rules. In the work, results were obtained for modified road bitumen with the additive "Viskogel" in a concentration residue of 1-5%. A certain influence of additives on the rheological characteristics of bitumen. The nutritional amount of additives, which positively affects the properties of bitumen, has been established. Obtained data on the results of testing on the concentration of the contact angle of wetting bitumen samples with a special concentration of additives enriched with aging procedures. These checks ensure system stability for 48 hours. Based on the knowledge about the limitedness and dispersity of bitumen, a model for the participation of a rheological additive in the asphaltene-maltene system is proposed.
{"title":"ORGANOCLAY BASED ADDITIVE AS A TOOL FOR CONTROL OF RHEOLOGICAL PROPERTIES OF BITUMEN","authors":"M. Vysotskaya, O. N. Kindeev, A. Kurlykina, M. Kabalin","doi":"10.34031/2071-7318-2023-8-5-19-34","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-19-34","url":null,"abstract":"Bitumen is a complex, multicomponent colloidal dispersed system based on the interaction of asphaltenes (phases) and maltenes (medium). In the absence of external influence, such a system is in a relatively stable state. Any external phenomenon causes an equilibrium state of the colloid and initiates Ysol aggregation, accompanied by a qualitative change in properties. Thus, a quantitative change in the phase of a colloid entails a qualitative change in its state. One of the possible options for internal control of structure formation and bitumen index is the application of rheological rules. In the work, results were obtained for modified road bitumen with the additive \"Viskogel\" in a concentration residue of 1-5%. A certain influence of additives on the rheological characteristics of bitumen. The nutritional amount of additives, which positively affects the properties of bitumen, has been established. Obtained data on the results of testing on the concentration of the contact angle of wetting bitumen samples with a special concentration of additives enriched with aging procedures. These checks ensure system stability for 48 hours. Based on the knowledge about the limitedness and dispersity of bitumen, a model for the participation of a rheological additive in the asphaltene-maltene system is proposed.","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88512020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-92-104
A. Shipley, E. Ladik
. In the modern period, the cities of Syria are faced with unprecedented destruction of historical buildings due to military operations in the country. In this regard, the historical cities of Syria need to study the current state of the urban environment in order to determine the promising directions and principles for its restoration, considering regional characteristics. The article discusses the specifics of the planning structure of the historical cities of Syria and their modern urban planning problems on the example of the city of Damascus. The authors of the study carried out a retrospective analysis and identified the main stages of the historical development of the central part of the city of Damascus (Roman, Islamic, French and modern), conducted a comparative analysis of the development stages of the historical Syrian cities of Aleppo and Latakia. The planning structure of the historical city center, its current location in the city structure, the state of cultural heritage sites, as well as transport and pedestrian accessibility are analyzed. The analysis revealed a number of urban planning problems, including: the spread of destruction in the structure of the city, the destruction of cultural heritage sites, the formed illegal residential development, the insufficient number of green areas in the central part of the city, problems associated with transport infrastructure, etc., promising directions for their solutions
{"title":"REGIONAL FEATURES AND CURRENT STATUS OF HISTORICAL DEVELOPMENT OF SYRIAN CITIES (ON THE EXAMPLE OF DAMASCUS)","authors":"A. Shipley, E. Ladik","doi":"10.34031/2071-7318-2023-8-5-92-104","DOIUrl":"https://doi.org/10.34031/2071-7318-2023-8-5-92-104","url":null,"abstract":". In the modern period, the cities of Syria are faced with unprecedented destruction of historical buildings due to military operations in the country. In this regard, the historical cities of Syria need to study the current state of the urban environment in order to determine the promising directions and principles for its restoration, considering regional characteristics. The article discusses the specifics of the planning structure of the historical cities of Syria and their modern urban planning problems on the example of the city of Damascus. The authors of the study carried out a retrospective analysis and identified the main stages of the historical development of the central part of the city of Damascus (Roman, Islamic, French and modern), conducted a comparative analysis of the development stages of the historical Syrian cities of Aleppo and Latakia. The planning structure of the historical city center, its current location in the city structure, the state of cultural heritage sites, as well as transport and pedestrian accessibility are analyzed. The analysis revealed a number of urban planning problems, including: the spread of destruction in the structure of the city, the destruction of cultural heritage sites, the formed illegal residential development, the insufficient number of green areas in the central part of the city, problems associated with transport infrastructure, etc., promising directions for their solutions","PeriodicalId":9367,"journal":{"name":"Bulletin of Belgorod State Technological University named after. V. G. Shukhov","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87791868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-15DOI: 10.34031/2071-7318-2023-8-5-52-61
O. Ryazancev, P. Trubaev, Y. Koshlich, D. Dotsenko, D. Buhanov
The analysis of the results of the instrumental thermal engineering survey of 22 multi-apartment residential buildings built of silicate and ceramic bricks or reinforced concrete panels, with a service life of buildings of more than 40–50 years, carried out before major repairs is given. Thermal calculations to determine the savings in energy resources showed an average value of savings in thermal energy after insulation of 28 %. Typical defects of enclosing structures identified during thermal imaging examination are presented and systematized. An external examination by infrared thermography is carried out with a thermal imager, followed by processing of thermograms. The absence of influence of the results of thermal imaging examination on the parameters of the insulation is shown. The results of measurements of resistance to heat transfer are presented. The measurements are made using ten-channel heat flux density and temperature meters. The actual measured heat transfer resistance deviated from the design resistance by an average of 16 per cent to 33 per cent. The heat transfer resistance of the wall before insulation is much less than the value of the heat transfer resistance of the insulation and the final resistance of the multilayer wall structure. The error in determining the thermal resistance of the insulated wall does not affect the required thickness of the insulation. It is concluded that the instrumental examination of the enclosing structures of buildings before a major overhaul seems to be redundant. It is recommended to use a typical thickness of insulation during the overhaul of Soviet-built residential buildings, which for the climatic conditions of the Belgorod Region will be 10 cm of mineral wool insulation.
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