Pub Date : 2020-06-04DOI: 10.34031/2618-7183-2019-2-3-41-47
V. Lesovik, M. Absimetov, M. Elistratkin, S. Shatalova
the basis of the modern market of cellular concrete is autoclaved gas silicate. At the same time, non-autoclaved aerated concrete is largely a more technological material, allowing the variation of its properties within a wide range, having a potentially wider field of application, less costly in the organization of production, which is of great importance for small and medium-sized businesses. The main problem of non-autoclaved aerated concrete is a higher cost of raw materials compared to silicate, and 20...30% lower strength performance. The proposed solution to this problem is the development of special composite binders with a limited content of clinker and mineral additives of various genetic types, taking into account the peculiarities of the two-stage structure formation of the material – gas porization and the formation of the microstructure of the stone. The article deals with some aspects of the interaction in the system “mineral additive – gypsum – by-products of the gas release reaction” in terms of the effect on the viscosity of the swelling mass and the strength of the stone at different times of hardening. Recommendations are given on the preferred compositions of composite binders and dosages of gypsum in the molding mixture when producing a material with an average density in the range of 500...700 kg/m3.
{"title":"FOR THE STUDY OF PECULIARITIES OF STRUCTURE FORMATION OF COMPOSITE BINDERS FOR NON-AUTOCLAVED AERATED CONCRETE","authors":"V. Lesovik, M. Absimetov, M. Elistratkin, S. Shatalova","doi":"10.34031/2618-7183-2019-2-3-41-47","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-3-41-47","url":null,"abstract":"the basis of the modern market of cellular concrete is autoclaved gas silicate. At the same time, non-autoclaved aerated concrete is largely a more technological material, allowing the variation of its properties within a wide range, having a potentially wider field of application, less costly in the organization of production, which is of great importance for small and medium-sized businesses. The main problem of non-autoclaved aerated concrete is a higher cost of raw materials compared to silicate, and 20...30% lower strength performance. The proposed solution to this problem is the development of special composite binders with a limited content of clinker and mineral additives of various genetic types, taking into account the peculiarities of the two-stage structure formation of the material – gas porization and the formation of the microstructure of the stone. The article deals with some aspects of the interaction in the system “mineral additive – gypsum – by-products of the gas release reaction” in terms of the effect on the viscosity of the swelling mass and the strength of the stone at different times of hardening. Recommendations are given on the preferred compositions of composite binders and dosages of gypsum in the molding mixture when producing a material with an average density in the range of 500...700 kg/m3.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126245893","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 : 2020-06-04DOI: 10.34031/2618-7183-2019-2-3-78-84
S. Manzhilevskaya
environmental monitoring of construction production should use modern scientific and technical method of physical, chemical and biological control for periodic or continuous monitoring and measurement of factors associated with chemical pollutants and physical and biological pollution on the spot, and for the correct assessment of environmental quality. For a construction project, all stages of construction production need environmental monitoring due to different monitoring purposes. During the entire construction period, environmental monitoring can accurately, timely, comprehensively reflect the impact of construction work on the site and the environment and provide a scientific basis for environmental management. Continuous monitoring provides real-time, up-to-date results to help environmental management professionals understand environmental quality in a site and be able to respond in a timely manner.
{"title":"ENVIRONMENTAL MONITORING OF ECOLOGICAL SAFETY IN AREAS OF CONSTRUCTION, RECONSTRUCTION AND OPERATION OF OBJECTS","authors":"S. Manzhilevskaya","doi":"10.34031/2618-7183-2019-2-3-78-84","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-3-78-84","url":null,"abstract":"environmental monitoring of construction production should use modern scientific and technical method of physical, chemical and biological control for periodic or continuous monitoring and measurement of factors associated with chemical pollutants and physical and biological pollution on the spot, and for the correct assessment of environmental quality. For a construction project, all stages of construction production need environmental monitoring due to different monitoring purposes. During the entire construction period, environmental monitoring can accurately, timely, comprehensively reflect the impact of construction work on the site and the environment and provide a scientific basis for environmental management. Continuous monitoring provides real-time, up-to-date results to help environmental management professionals understand environmental quality in a site and be able to respond in a timely manner.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"30 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114094587","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 : 2020-06-04DOI: 10.34031/2618-7183-2019-2-3-65-71
Imad Ali Al'-Shalaut, M. Vysotskaya, D. Kuznecov, A. Kurlykina
directed regulation of asphalt concrete properties is an important condition for obtaining a durable material that minimizes operating costs. One of such perspective directions is modification of building compositions by nanoscale objects. The method of modification of mineral powder from dolomite by carbon nanotubes is considered in the work, and results of tests of asphalt concrete on its basis are given. It is shown that the use of nanomodified dispersed dolomite in the technology of preparation of asphalt concrete mixture on the surface of the grains of mineral material forms a strong, high-temperature resistant layer of structured bitumen. The increase in the dynamic viscosity of bitumen and the complex shear modulus under the influence of CNT contributes to the change in the yield strength of asphalt concrete above the maximum shear stresses, which leads to a slight accumulation of residual plastic deformations in the plate in the study of the resistance to ruts. Thus, modification of bitumen and asphalt concrete with nanoscale additives can be an effective tool in the fight against plastic deformations such as shifts, surges and rutting in hot climates, for example, in Jordan.
{"title":"DIRECTED REGULATION OF PROPERTIES OF ASPHALT CONCRETE BY NANOCARBON OBJECTS","authors":"Imad Ali Al'-Shalaut, M. Vysotskaya, D. Kuznecov, A. Kurlykina","doi":"10.34031/2618-7183-2019-2-3-65-71","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-3-65-71","url":null,"abstract":"directed regulation of asphalt concrete properties is an important condition for obtaining a durable material that minimizes operating costs. One of such perspective directions is modification of building compositions by nanoscale objects. The method of modification of mineral powder from dolomite by carbon nanotubes is considered in the work, and results of tests of asphalt concrete on its basis are given. It is shown that the use of nanomodified dispersed dolomite in the technology of preparation of asphalt concrete mixture on the surface of the grains of mineral material forms a strong, high-temperature resistant layer of structured bitumen. The increase in the dynamic viscosity of bitumen and the complex shear modulus under the influence of CNT contributes to the change in the yield strength of asphalt concrete above the maximum shear stresses, which leads to a slight accumulation of residual plastic deformations in the plate in the study of the resistance to ruts. Thus, modification of bitumen and asphalt concrete with nanoscale additives can be an effective tool in the fight against plastic deformations such as shifts, surges and rutting in hot climates, for example, in Jordan.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123704888","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 : 2020-06-04DOI: 10.34031/2618-7183-2019-2-3-85-89
O. Subbotin
the article is devoted to the study of the principles of the use of building materials in the restoration of monuments of architectural and urban heritage. The basic properties of materials, classification and specificity of their application are indicated. As a result of the analysis, the most important role of the material in the formation of the architectural image of the object is justified. It is concluded that the material should be considered not only in the context of technical parameters, but also in terms of architectural and artistic characteristics. The attention is focused on the understanding of the authenticity of the object and on the operational properties of materials for decoration. It is noted that the choice of material should be based on the previous stage of material research, as a segment of a detailed survey of the technical condition of the structure.
{"title":"FEATURES OF USING BUILDING MATERIALS IN RESTORATION OF ARCHITECTURAL AND TOWN-PLANNING HERITAGE","authors":"O. Subbotin","doi":"10.34031/2618-7183-2019-2-3-85-89","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-3-85-89","url":null,"abstract":"the article is devoted to the study of the principles of the use of building materials in the restoration of monuments of architectural and urban heritage. The basic properties of materials, classification and specificity of their application are indicated. As a result of the analysis, the most important role of the material in the formation of the architectural image of the object is justified. It is concluded that the material should be considered not only in the context of technical parameters, but also in terms of architectural and artistic characteristics. The attention is focused on the understanding of the authenticity of the object and on the operational properties of materials for decoration. It is noted that the choice of material should be based on the previous stage of material research, as a segment of a detailed survey of the technical condition of the structure.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131756768","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 : 2020-06-02DOI: 10.34031/2618-7183-2019-2-6-20-28
E. Karpikov, N. Lukutcova, G. Soboleva, S. Golovin, Yu. A. Cherenkova
The possibility of obtaining effective highly dispersed additives from natural wollastonite is substantiated and their influence on the properties of fine-grained concrete is investigated. On the basis of wollastonite, a complex micro-filler with particle sizes up to 100 microns was developed, obtained by joint grinding with quartz sand in a 3:1 ratio in a ball mill in the presence of an anionic surfactant naphthalene-formaldehyde type C-3 and a calcium stearate hydrophobizer technical C-17. A suspension of wollastonite with a modal particle diameter of 405 nm was obtained by pre-grinding wollastonite and anionic surfactant in a ball mill, with their further ultrasonic treatment in a bath-type activator. Mathematical models of the dependence of compression and bending strength on the content of the initial components are developed. It is established that the complex microfill leads to an increase in the strength of fine-grained concrete in bending by 2 times, in compression by 1.7 times with its content in the composition of fine-grained concrete in the amount of 10% by weight of cement. Wollastonite suspension increases the bending strength of fine-grained concrete to 3.1 MPa, compression to 57.8 MPa. The results of qualitative x-ray phase analysis showed that the total intensity of diffraction maxima of not fully hydrated alite C3S, belite C2S grains and their aggregates in cement stone with wollastonite decreases by 1.5-2 times compared to the control composition. This is most likely due to the amorphous nature of the wollastonite surface after grinding in a ball mill and ultrasonic dispersion in a bath-type activator. In addition, such particles are the centers of crystallization. Their needle-like shape contributes to the reinforcement of the structure by crystallizing new formations of cement stone.
{"title":"EFFECT OF MICROFILLERS BASED ON NATURAL WOLLASTONITE ON PROPERTIES OF FINE-GRAINED CONCRETE","authors":"E. Karpikov, N. Lukutcova, G. Soboleva, S. Golovin, Yu. A. Cherenkova","doi":"10.34031/2618-7183-2019-2-6-20-28","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-6-20-28","url":null,"abstract":"The possibility of obtaining effective highly dispersed additives from natural wollastonite is substantiated and their influence on the properties of fine-grained concrete is investigated. On the basis of wollastonite, a complex micro-filler with particle sizes up to 100 microns was developed, obtained by joint grinding with quartz sand in a 3:1 ratio in a ball mill in the presence of an anionic surfactant naphthalene-formaldehyde type C-3 and a calcium stearate hydrophobizer technical C-17. A suspension of wollastonite with a modal particle diameter of 405 nm was obtained by pre-grinding wollastonite and anionic surfactant in a ball mill, with their further ultrasonic treatment in a bath-type activator. Mathematical models of the dependence of compression and bending strength on the content of the initial components are developed. It is established that the complex microfill leads to an increase in the strength of fine-grained concrete in bending by 2 times, in compression by 1.7 times with its content in the composition of fine-grained concrete in the amount of 10% by weight of cement. Wollastonite suspension increases the bending strength of fine-grained concrete to 3.1 MPa, compression to 57.8 MPa. The results of qualitative x-ray phase analysis showed that the total intensity of diffraction maxima of not fully hydrated alite C3S, belite C2S grains and their aggregates in cement stone with wollastonite decreases by 1.5-2 times compared to the control composition. This is most likely due to the amorphous nature of the wollastonite surface after grinding in a ball mill and ultrasonic dispersion in a bath-type activator. In addition, such particles are the centers of crystallization. Their needle-like shape contributes to the reinforcement of the structure by crystallizing new formations of cement stone.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128280635","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 : 2020-06-02DOI: 10.34031/2618-7183-2019-2-6-29-37
L. Mailyan, S. Yazyev, L. Sabitov, Yu.V. Konoplev, O. Radaykin
The aim of the work was to evaluate the effectiveness of the system "combined tower-reinforced concrete foundation-foundation soil" for high-rise structures on the example of a wind power plant (wind turbine) with a capacity of 1.5-2.0 MW using computer modeling in the PC "Ansys". Thus, under the combined tower the article refers to high-rise building, consisting of two parts: the lower composite, the upper – in the form of a thin-walled core-shell closed profile. In both cases, the shell is a pipe with a weak taper. As an analogue, the WPP considered in foreign literature is adopted: the radius of the rotor is R=41 m, the height to the axis of the wind wheel is zhub=80 m. The shell is made of high-strength C355 steel and, unlike the analog in this work, the cavity of the lower part of the tower to a height of 20 m was filled with B60 class concrete. The modeling took into account the spatial work of the elements of the structural system and the physical nonlinearity of the materials from which they are made. At the same time, the Mises strength theory was used for steel, the Williams – Varnake theory for concrete, and the Drukker – Prager theory for the foundation soil. Comparison of the calculation results with the analog showed that the destructive load of the tower increased by 37% due to filling the lower part of it with concrete, which indicates the effectiveness of the proposed solution. In this case, the destruction of the tower with a concrete core and without it occurred from the loss of local stability of the steel shell at the level of the junction of the tower with the foundation (with a compressed zone).
{"title":"STRESS-STRAIN STATE OF THE SYSTEM \"COMBINED TOWER-REINFORCED CONCRETE FOUNDATION-FOUNDATION SOIL\" OF HIGH-RISE STRUCTURES","authors":"L. Mailyan, S. Yazyev, L. Sabitov, Yu.V. Konoplev, O. Radaykin","doi":"10.34031/2618-7183-2019-2-6-29-37","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-6-29-37","url":null,"abstract":"The aim of the work was to evaluate the effectiveness of the system \"combined tower-reinforced concrete foundation-foundation soil\" for high-rise structures on the example of a wind power plant (wind turbine) with a capacity of 1.5-2.0 MW using computer modeling in the PC \"Ansys\". Thus, under the combined tower the article refers to high-rise building, consisting of two parts: the lower composite, the upper – in the form of a thin-walled core-shell closed profile. In both cases, the shell is a pipe with a weak taper. As an analogue, the WPP considered in foreign literature is adopted: the radius of the rotor is R=41 m, the height to the axis of the wind wheel is zhub=80 m. The shell is made of high-strength C355 steel and, unlike the analog in this work, the cavity of the lower part of the tower to a height of 20 m was filled with B60 class concrete. The modeling took into account the spatial work of the elements of the structural system and the physical nonlinearity of the materials from which they are made. At the same time, the Mises strength theory was used for steel, the Williams – Varnake theory for concrete, and the Drukker – Prager theory for the foundation soil. Comparison of the calculation results with the analog showed that the destructive load of the tower increased by 37% due to filling the lower part of it with concrete, which indicates the effectiveness of the proposed solution. In this case, the destruction of the tower with a concrete core and without it occurred from the loss of local stability of the steel shell at the level of the junction of the tower with the foundation (with a compressed zone).","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125751355","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 : 2020-06-02DOI: 10.34031/2618-7183-2019-2-6-50-57
T. Kolesnikova, Aliya Hasan
This article discusses the main aspects of the location of primary health care facilities in Yemen. We studied the requirements directly for the site of such medical care institutions. It is also revealed how to determine the correct orientation of the building center. In addition, the functional components and construction sites of primary care facilities are described. The components of a medical center include: the first floor – a medical center, the second floor - a doctor's apartment, a security room, an electric generator, an incinerator for medical waste, and a fence for a medical center. The article defines the architectural principles and elements of the project of medical centers. These elements of the project of primary health care institutions include: the main entrance, administrative department, medical services section, examination rooms, rest rooms, radiology room, surgical ward, pharmacy, mechanics section. The general design assumptions for the building of primary health care are discussed. Design standards for these institutions are identified.
{"title":"ARCHITECTURE PLANNING AND DESIGN CONCEPTS OF PRIMARY HEALTH CARE INSTITUTIONS IN YEMEN","authors":"T. Kolesnikova, Aliya Hasan","doi":"10.34031/2618-7183-2019-2-6-50-57","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-6-50-57","url":null,"abstract":"This article discusses the main aspects of the location of primary health care facilities in Yemen. We studied the requirements directly for the site of such medical care institutions. It is also revealed how to determine the correct orientation of the building center. In addition, the functional components and construction sites of primary care facilities are described. The components of a medical center include: the first floor – a medical center, the second floor - a doctor's apartment, a security room, an electric generator, an incinerator for medical waste, and a fence for a medical center. The article defines the architectural principles and elements of the project of medical centers. These elements of the project of primary health care institutions include: the main entrance, administrative department, medical services section, examination rooms, rest rooms, radiology room, surgical ward, pharmacy, mechanics section. The general design assumptions for the building of primary health care are discussed. Design standards for these institutions are identified.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"19 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113979032","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 : 2020-06-02DOI: 10.34031/2618-7183-2019-2-6-5-11
L. Ahtyamova, L. Sabitov, A. Mailyan, L. Mailyan, O. Radaykin
The paper proposes a new type of modular collapsible reinforced concrete foundation for steel support for various types of structures: power lines, wind power plants, billboards, traffic lights, etc.The foundation has the shape of a cross-hammer in the plan and consists of separate modules manufactured at the factory and connected to each other by concrete dowels and tie bolts on the construction site. At the same time, this technological approach makes it possible to obtain more stable (uniform) strength and deformation properties of both the individual module and the assembled foundation as a whole. Reducing the material consumption is achieved by creating a cavity in each typical module and filling it with local inert material (soil). The central module has an anchor device for joining with the support according to the type of flange connection. This device, along with the use of conventional anchor bolts, involves filling the central module with non-shrinkable fast-hardening steel-fiber concrete. Thus, the positive result of the proposed solution is to increase the bearing capacity of the foundation as a whole, increase the strength and stiffness of its main joints, and simplify installation in comparison with traditional approaches to construction. A comparative calculation of the foundations of the proposed and standard known solutions showed the effectiveness of the first one by at least 17.2%.
{"title":"TECHNOLOGICAL AND DESIGN FEATURES OF DESIGNING A MODULAR REINFORCED CONCRETE FOUNDATION FOR A HIGH-RISE BUILDING OF VARIOUS TYPES","authors":"L. Ahtyamova, L. Sabitov, A. Mailyan, L. Mailyan, O. Radaykin","doi":"10.34031/2618-7183-2019-2-6-5-11","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-6-5-11","url":null,"abstract":"The paper proposes a new type of modular collapsible reinforced concrete foundation for steel support for various types of structures: power lines, wind power plants, billboards, traffic lights, etc.The foundation has the shape of a cross-hammer in the plan and consists of separate modules manufactured at the factory and connected to each other by concrete dowels and tie bolts on the construction site. At the same time, this technological approach makes it possible to obtain more stable (uniform) strength and deformation properties of both the individual module and the assembled foundation as a whole. Reducing the material consumption is achieved by creating a cavity in each typical module and filling it with local inert material (soil). The central module has an anchor device for joining with the support according to the type of flange connection. This device, along with the use of conventional anchor bolts, involves filling the central module with non-shrinkable fast-hardening steel-fiber concrete. Thus, the positive result of the proposed solution is to increase the bearing capacity of the foundation as a whole, increase the strength and stiffness of its main joints, and simplify installation in comparison with traditional approaches to construction. A comparative calculation of the foundations of the proposed and standard known solutions showed the effectiveness of the first one by at least 17.2%.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128858655","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 : 2020-06-02DOI: 10.34031/2618-7183-2019-2-6-38-43
S. Badmaeva, E. Maksimov
In the modern world, in using land resources, we are faced with a number of problems, this is more expressed in megacities, because the majority of the population of our planet lives in these territories. The article briefly analyzes the current state of Krasnoyarsk, physical-geographical and economic conditions of the city development. The issues of territorial planning in the city are considered on the example of the microdistrict "Pokrovsky". High-rise buildings and their crowding influenced on the formation of wind flows and dispersion of impurities. It is established that the building affects the wind speed, reducing it by nearly 25-30% compared to the undeveloped urban part. In a dense building, the wind speed can be reduced to 70%. Inefficient land use model is reflected in the quality of the living environment, including the connectivity of the territory. The infrastructure is developed for children of younger preschool age-yard areas are everywhere equipped with children's game elements. Social adaptability for the elderly in the district is poorly expressed. The issue of parking spaces is acute, and their lack indicates the impossibility of creating a neighborhood with a high level of quality of life. Local problems include the construction of noise screens along major highways, which have a low-quality design and technical solution. The provision of public transport is unsatisfactory. Spatially in the "intercession" we need a clear separation of yards and public spaces. Due to this, within the four large neighborhoods-quarters there will be a quasi-quarterly structure that helps to organize the hierarchy of spaces, eliminating or minimizing transit traffic through the yards.
{"title":"ACTUAL PROBLEMS OF URBAN LAND USE ON THE EXAMPLE OF KRASNOYARSK","authors":"S. Badmaeva, E. Maksimov","doi":"10.34031/2618-7183-2019-2-6-38-43","DOIUrl":"https://doi.org/10.34031/2618-7183-2019-2-6-38-43","url":null,"abstract":"In the modern world, in using land resources, we are faced with a number of problems, this is more expressed in megacities, because the majority of the population of our planet lives in these territories. \u0000The article briefly analyzes the current state of Krasnoyarsk, physical-geographical and economic conditions of the city development. The issues of territorial planning in the city are considered on the example of the microdistrict \"Pokrovsky\". High-rise buildings and their crowding influenced on the formation of wind flows and dispersion of impurities. It is established that the building affects the wind speed, reducing it by nearly 25-30% compared to the undeveloped urban part. In a dense building, the wind speed can be reduced to 70%. Inefficient land use model is reflected in the quality of the living environment, including the connectivity of the territory. The infrastructure is developed for children of younger preschool age-yard areas are everywhere equipped with children's game elements. Social adaptability for the elderly in the district is poorly expressed. The issue of parking spaces is acute, and their lack indicates the impossibility of creating a neighborhood with a high level of quality of life. Local problems include the construction of noise screens along major highways, which have a low-quality design and technical solution. The provision of public transport is unsatisfactory. Spatially in the \"intercession\" we need a clear separation of yards and public spaces. Due to this, within the four large neighborhoods-quarters there will be a quasi-quarterly structure that helps to organize the hierarchy of spaces, eliminating or minimizing transit traffic through the yards.","PeriodicalId":127090,"journal":{"name":"Construction Materials and Products","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123180455","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 : 2020-06-01DOI: 10.34031/2618-7183-2018-1-3-11-16
V. Doroganov, E. Neverova, S. Stankovich
this article discusses the possibility of using artificial ceramic binders obtained by the technology of highly concentrated binder suspensions in the production of ceramic materials and products. The results of complex studies of suspensions of artificial ceramic binders based on feldspar and quartz sand, as well as the results of tests of the samples obtained on their basis are presented. A definite advantage of entering the suspensions in the molding compositions of the slurries used in the manufacture of certain varieties of pottery is proved. The solution of the problem of import substitution of raw materials components, caused mainly by the difficult political situation in the country, as well as the lack of its own raw material base of good quality, in connection with which the paper proposes the use of technology of highly concentrated binder suspensions, which allows to optimize the quality of domestic raw materials. The use of technology of highly concentrated binder suspensions, allows not only to expand the assortment and range of products produced by this technology, but also to improve the quality and economic feasibility of individual varieties of ceramics. The emphasis on the introduction of technology of highly concentrated binding suspensions in certain areas of ceramics production is explained by the formation of a completely different structure of materials due to the increased content of nanoparticles in the composition of artificial ceramic binding suspensions, which contributes to a significant increase in mechanical strength while optimizing other basic technological quality indicators for ceramic materials and products. The possibility of reducing the firing temperature by 50-100°C, however, this issue requires additional research.
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