×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • "Bezobzhigovyj wall brick compression molding of the Tripoli-based"

    Improving the effectiveness of the bezobzhigovogo wall brick compression molding is achieved by using as a placeholder-Tripoli. Application of Tripoli helps improve brick group Thermo-technical characteristics of ineffective to conditionally effective. Provided with high marks on brick durability. A large amount of water absorption by weight and low coefficient of softening indicate low water resistance bricks. Bezobzhigovyj wall brick compression molding of the Tripoli-based can be regarded only as a private, secure personal brick or other waterproof material.

    Keywords: brick, cement, Tripoli, water, pressing, pressure, hardening, density, strength, water absorption

  • Research of influence of parameters of triangulation in the environment of the programmatic complex SAPPHIRE on the results of calculation.

    Modern programmatic complexes, supporting BIM technologies, allow in the automatic mode to carry out a transition from the 3d-модели of building to the model analytical, and then to the calculation certainly to the element model of building, the calculation of that is conducted with the use of programmatic complexes being based on the use of method of eventual elements. The results of calculation of different variants of the net of eventual elements, generated by facilities of the programmatic complex SAPPHIRE, are considered in the article. As a model for a calculable experiment the fragment of monolithic multistory girderless framework is accepted. The knot of leaning of flag on a column was designed both with the use of absolutely hard body and without him. The step of triangulation was varied in limits a from 1/35 to 1/5 span. The article of analysis is choose the area of lower longitudinal armature along the axis "Х" in the middle of flight. It is set that not dependency upon a type and step of triangulation the use of absolutely hard bodies conduces to the decline of the armature required by a calculation on the average it is Also certain on 6 %., that type and step the triangulations used in the programmatic complex SAPPHIRE substantial influence on the result of selection of flight armature do not render. However it is necessary to take into account that this result is got for charts in that obligatory is eventual elements, the centres of gravity of that are situated in the middle of flight, to what it is needed to aim in the process of creation of computer model of building.

    Keywords:

  • Modeling the pulsating component of the wind load on the building frame by several calculation methods

    The simulation of the pulsating component of the wind load on the reinforced concrete skeleton of the building by the finite element method is considered in the article. The calculation of the pulsation component of the wind load was carried out according to the procedure specified in SP20.13330.2011 "Loads and Impacts" and calculation of the pulsating component of the wind load in accordance with the recommendations of CNIISK them. Kucherenko. Based on the results of the calculations, the analysis of the results obtained and conclusions are made.

    Keywords: finite element method, design scheme, vibration modes, pulsating component of wind load, building frame

  • The method of economy of material resources at factories of the construction industry

    In the article the results of studying the experience of factories of the construction industry concluded that the production of products manufactured are loss of original building materials. The proposed method of elimination of losses and method of calculation of the amount of these losses. An algorithm is developed to determine the causes of losses, as well as recommendations on elimination of waste construction materials. The research results are recommended for practical application in the factories of the construction industry

    Keywords: method of saving material resources, factories, construction industry

  • Architectural and planning solutions for low-rise economy class housing for the conditions of the Kabardino-Balkarian Republic

    The article substantiates the need to design and build low-rise economy class residential buildings for the successful implementation of the resettlement program from dilapidated and dilapidated housing. Architectural and planning solutions of different types of low-rise apartment houses of economy class for construction on the territory of the Kabardino-Balkarian Republic.

    Keywords: Residential building, economy class, attic, dilapidated housing, emergency housing, comfortable housing, affordable housing, a blockaded house

  • Ensuring energy efficiency of buildings through the use of composite foam as a new thermal insulation material

    The paper discusses the importance of reconstruction of the existing buildings and structures as energy efficient premises. It highlights that, despite the tendency to demolish residential facilities built in the second half of the twentieth century, in many cities (not only in Russia) these premises are still in demand on the real property market. Because one of the principles of making energy efficient buildings through their reconstruction is to increase the thickness of enclosing structures the paper suggests using composite foam (PENOCOM®) as a certified composite thermal insulation material. The paper sets out the main characteristics of composite foam and provides a summary description of the technology to increase wall thickness with the use of composite foam.

    Keywords: energy efficient building, reconstruction, enclosing structures, thermal insulation material, composite foam, technology to increase wall thickness

  • Design features of the new regulating valves straight-through type

    Regulating the flow of liquids in pipe systems is carried out by different types of control valves. In the petroleum and chemical industries the most widely regulating valves straight-through type. However, in many constructions of valves of this type the problem of cavitation is not resolved completely. With the aim of reducing the negative impact of cavitation on the valve body and pipeline the authors have proposed and developed new designs of valves uniflow type organization of the fluid flow in internal cavities which helps to reduce cavitation effects.

    Keywords: transportation, fluid valve, regulating, cavitation, flow, valves

  • The efficiency of ventilation systems

    Discusses current issues related to the definition of the efficiency of ventilation systems on the composite elements of the installation. The dependence for determining the efficiency of the installation taking into account pressure losses in the elements of the installation.

    Keywords: ventilation, air supply unit, efficiency, electric motor, quality criteria, pressure loss, power

  • Sustainable development city. Multifaceted approach with transformational change urban areas

    This article is devoted to becoming of sustainable development urban areas, urban development and regulation of development in Russia, city-planning norms and rules. Based on the results it offers methods for solving topical problem and multifaceted approach with transformational change urban areas.

    Keywords: sustainable development urban areas, urban development, urban planning, reconstruction urban areas, energy efficiency technology

  • The possibility of using ultrafine liquid thermal insulation to protect the load-bearing reinforced concrete elements in multi-layered outside wall

    The article presents the results of the analysis of temperature fields in the construction of multilayer walls depending on the location of ultrathin liquid insulation. Carried out graphical analysis. Summarizes the experience of reconstruction and operation of buildings.

    Keywords: thermophysical properties of materials; architectural-structural design; thermal conductivity coefficient; the calculation of the temperature fields

  • Analysis othodopererabatyvayuschih plants in Europe

    The article is devoted to acquaintance with foreign ways of recycling and use of secondary resources. The article also discusses the projects of landscaping plants.

    Keywords: waste, secondary material resources, landscaping, recycling, electrical energy, solid residue, chemicals, tightness, burning, filtration, organic matter, decomposition, anaerobic bacteria, energy efficiency, emissions

  • The influence of the elements of the mounting frame of a ventilated facade on building thermal losses

    Obtained in the course of work the results show that the heat loss through fasteners ventilated facade is 40.5% of the total heat loss through the outer face of the facade. Using the data obtained for the evaluation of the heat losses of a 7 - storey residential building in the city of Nalchik, with a total area of external walling 2.470 sq. m. found that at a temperature difference of 39°C for 1 hour in the wall is the thermal energy in the amount of 57 kW«h, including 23.1 kW«h refer to the heat loss via the fastening elements of the facade panels, for 24 hours through heat-conducting inclusions is lost 554.4 kW«h For 7 months of the heating period with an average temperature of 28°C the heat loss will be 83745.7 kW«h Taking the cost of 1 kW«h of electricity 3.47 RUB and assess the rate of heat loss through the frame of a ventilated facade in cash for the entire heating period, will receive additional heat loss through the frame of a ventilated facade cost 290597 RUB.

    Keywords: temperature field, heat-conducting inclusions, ventilated facade, heat, heat flux, fasteners

  • Methodology for conducting field experimental studies on the landslide slopes and road designs on them using vibro-measuring complex

    The method of in situ experimental studies on the landslide slopes and road designs on them using vibro-measuring complex

    Keywords: The landslide slope, experiment, microseismic vibrations, monitoring of dynamic deformation, vibrometry, model

  • The influence of technological factors on the properties of non-autoclaved aerated concrete

    In the article the problems of the technology of aerated concrete products of non-autoclaved hardening are considered and the literature data concerning the study of the influence of various factors on manufacturing technology are analyzed. The results of experimental studies devoted to the study of the role of additives of various types in the formation of aerocrete structure are presented. The influence of three factors was investigated: the type of surfactant introduced into the aerated concrete mix; presence of caustic soda additive; the consumption of aluminum powder on the process of structure formation and the properties of non-autoclaved aerated concrete. The obtained data made it possible to take a detergent powder as a surfactant in further experiments. It has been experimentally confirmed that exclusion of caustic soda from the composition of the aerated concrete mix leads to a decrease in alkalinity, and accordingly the gas release reaction proceeds much more slowly, which leads to an increase in the density of aerated concrete, the appearance of defects on the surface of products, and a significant increase in rejects. The optimal content of aluminum powder in the composition of aerated concrete is determined, which corresponds to grade PAP-1 - 5.75 g.

    Keywords: Non-autoclaved aerated concrete, additive, surfactant, caustic soda, aluminum powder, gasifier, gassing

  • Effect of a structuring additive on the physical and mechanical properties of non-autoclaved aerated concrete

    This article considers the influence of a structuring additive on the physical and mechanical properties of aerated concrete. As a structuring additive, a by-product was introduced into the composition of the aerated concrete mixture by cutting the top layer of the "gorbuschka" in an amount of 10 to 30%. Comparative analysis of the results of physical and mechanical tests of aerated concrete samples with different amount of structuring additive showed that its introduction increases the compressive strength, while simultaneously increasing the density of aerated concrete. At the same time, the value of the constructive quality factor in GB4 (with 20% of the "gorbuschka") is 20.4% higher than in GB2 (with 30% of the "gorbuschka") and 31% higher than for the aerated concrete base composition GB1 (control) that allowed us to take him for the optimal composition in further research.

    Keywords: "gorbuschka", structuring of aerated concrete, non-autoclaved aerated concrete, structuring additive, swelling process, plastic strength of the structure, constructive quality coefficient, average density in the dry state, compressive strength

  • Parallel coupled resonator filters

    Modelling and experimental research of filter onhalf-wave resonators with quarter-wavelength links was made. The following experimental result were received: - center frequency was 3.7 GHz; - passband width was 230 MHz; - losses in the passband were not more than 4 dB; - bkocking at tuning ± 200 MHz was not less than 40 dB. It is recommended to use the filter in a microwave receiver input circuit.

    Keywords: Parallel coupled resonator filters, modelling, experiment, wave S range

  • Substantiation of constructive solutions of high-rise buildings with outrigger floors undergoing progressive destruction

    A finite-element model of a high-rise monolithic frame building has been developed, with the calculation of the bearing capacity of the main structural elements in the course of progressive destruction. The influence of introduction of the outrigger floors in the structural scheme is investigated.

    Keywords: Finite element model, outrigger floor, progressive destruction, bearing capacity, reinforced concrete, frame, structural element

  • Principles and characteristics of the method for ensuring the reliability of single-purpose machines

    The aim of the method described in the article is to present a methodical approach to solving (in our opinion for the first time) the problems of ensuring the reliability of single-production machines. A number of principles are formulated, some of which are used from the method for serial machines, and some are new. Instead of the general set of infinite volume, a set of finite volume is used. Uniformity of the aggregate and samples from it is ensured by the equality (with an error of 5-10%) of the main parameters - the minimum resources of the details of one machine, but the details of different for the purpose. The notion of a self-stand is introduced in operational accelerated tests to confirm the estimated parts resources.The article under review contains new results, is written on an actual topic, the presented results can be implemented at machine-building plants with significant economic effect. The article deserves publication in the scientific peer-reviewed journal "The Engineer's Digest of the Don".

    Keywords: security, reliability, machine, individual production, general, totality of the final volume, homogeneity, sampling, self-stand

  • Construction and reconstruction of buildings and constructions taking into account climatic factors

    Discusses actual problems of organization and management in the construction and reconstruction of buildings and constructions taking into account climatic factors. Recommendations for improvement of existing organizational forms of construction management based on zoning of the object, taking into account climatic factors. Indicated the need for a uniform management of the whole investment and construction complex from the beginning to the end of the operation of the facility

    Keywords: organization of construction; renovation and restoration, climatic factors

  • The main criteria of forming the urban centres from the point of view of town planning as a science

    The article discusses the criteria of a modern condition of urban centres and the need for reconstruction of buildings and structures. Recommendations for improvement of existing organizational forms of management of urban development from the position of the centering urban infrastructure. Indicated the need for a uniform management of the whole investment and construction complex from the beginning to the end of the operation of the facility

    Keywords: organization of construction; renovation and restoration, the formation of the city center

  • Influence of pigments on the physico-mechanical properties of plaster

    Abstract: the main applications of pigments in the building and abroad. This paper studied the influence of pigments on the physico-mechanical properties of gypsum - strength properties, water absorption, softening coefficient and the capillary suction material. It is established that one of the important characteristics of gypsum composite is a capillary suction material, which determines to a considerable extent not only the physico-mechanical properties of the material, but also its operational durability.

    Keywords: Key words: pigments, physico-mechanical properties, strength properties, water absorption, softening coefficient, capillary leak, long service life

  • Preconditions of occurrence, specificity and principles of formation of linear parks

    In the article the nascent type of linear environment objects of the city-linear park was considered. The peculiarities, specific features of this type, its structural elements, methods of formation and basic principles of construction are revealed. Also, it was revealed the need to use the synthesis of methods that ensure the complex formation of the linear park environment: the method of deep-spatial compositional connection of territories, the method of scenario-functional zoning, the method of creating a local brand and the method of eco-rehabilitation of the incoming territories. Comparison of linear parks with the closest prototype - traditional pedestrian streets is made, the structure-forming role of the landscape component in the design of linear parks is revealed. As a result of the research, the authors made conclusions concerning the study of the phenomenon of linear park, its role and place in environmental design, specificity, an important function in the city's eco-rehabilitation.

    Keywords: Linear parks, eco-rehabilitation, natural-urban environment, ecological framework, scenario-functional zoning method; Method of local city brand

  • About the organization of traffic conditions of bridge cranes for a circle

    The article describes the main principles of the movement around the circumference of the cranes circular steps. It is proved that the defining characteristics of the organization of the movement of the crane on the circle are the geometric parameters of the mutual reversal of the running wheels of the crane, not the observance of the reversal determines the transverse slippage of wheels of the crane, and the shape of the wheels depends only on the elastic longitudinal slide. The result of slides and slippage is firing the head of the rail with one hand and the loss of stability when moving the crane. Stability stability ensures the achievement of the precision targeting of the gripping device. These parameters are the main performance characteristics that should be valued in absolute terms should be minimal.

    Keywords: nuclear power station, crane circular steps, suspension bridge crane, suspension wheel, cylindrical wheel, bevel wheel, the mutual reversal of wheels

  • Improvement of rheological properties of clay suspensions due to the introduction of electrolytes

    In article results of researches of influence of type and concentration of various electrolytes on the rheology of clay suspensions. The influence of liquid sodium glass, sodium carbonate, sodium tripolyphosphate and lignin-alkaline reagent on the fluidity of the clay slurries. It is shown that the use of a number of electrolytes at low concentrations increase the mobility of clay suspensions. Found that when using polymineral clay vladimirovskaya the greatest thinning effect was achieved with the introduction of the sodium silicate glass.

    Keywords: electrolytes, the clay slurry, the fluidity, ion exchange, dilution of clays, foam ceramics

  • To the question of reinforcement bezbalochnyh floors using PC SAPPHIRE

    In the article the results of reinforcement of monolithic reinforced concrete slab bezbalochnyh, different parameters of a finite element mesh, under other equal characteristics. Of course cell model was created by means of PC SAPPHIRE with subsequent transfer of analytical model in LIRA-CAD when creating analytical models used three variants of triangulation, namely: rectangular, triangular and adaptive step triangulation ranged over a wide range-from 1/6 up to 1/30 span. Bearing slabs at columns was carried out on two variants : using an absolutely rigid body and without it. The subject analysis of selected area of the upper longitudinal bearing fittings. During the analysis process was investigated the influence of automatic finite element mesh triangulation on anchor square fittings. Found that in all cases an increase in triangulation step reduces the required for calculating the square top of the longitudinal reinforcement. This reduction may reach 85%, and in case of insufficient quality control finite element mesh is going to cause a serious error in the calculation. When automatically generating a mesh leaf size can significantly exceed step triangulation. All meshes with the zone of transition from AGT to the plate in the form of triangles effect is observed the increase required for calculating reinforcement as you go further away from the brink of columns, that in our view it is illogical. Practical value as the most simple way, has the option of split slabs into rectangular finite elements with a size equal to or slightly greater than the section of the column. without the use of absolute hard bodies.

    Keywords: monolithic frame, non-beam overlapping, triangulation, selection of reinforcement, design calculation, PC SAPPHIRE, PC LIRA-CAD