Adhesion Strength Of Modified Plaster Solutions For
Restoration Of Rchitectural Monuments Of Bukhara,
2020
Bux MTI, K.Murtazoev, 15, 706500, Bukhara.
Adhesion Strength Of Modified Plaster Solutions For Restoration Of Rchitectural Monuments Of Bukhara, M.M. Vaxitov, A.A. Tulaganov, I.I. Tojiev
Journal of Tashkent Institute of Railway Engineers
In this work, the strength of historical mortars of brickwork of the Ismail Somoni mausoleum, the monument of architecture of the Kalyan minaret, the building of the Abdulazizkhan madrasah and the mausoleum of Abdukholik Gizhduvani were determined, and the compressive, tensile, bending and adhesion strengths of the developed modified gypsum mortars for restoration of the above architectural monuments were studied. It is shown that the adhesion strengths of modified gypsum mortars also meet the requirements of KMK 2-01-03-96.
Formation Of A Calculation Model, Study Of Stress-Strain
State And Vibrations Of Composite Shell Constructions
From Composite Materials,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Formation Of A Calculation Model, Study Of Stress-Strain State And Vibrations Of Composite Shell Constructions From Composite Materials, A Abdusattarov, Z.Z. Ergashev, F.E. Abdukadirov
Journal of Tashkent Institute of Railway Engineers
The article gives geometric and physical relationships for shell and ring elements. At the same time, it is assumed that the physical properties of the material of the shell element are described by equations of a viscoelastic medium, taking into account the influence of damage accumulation. Using an approximate method, namely, the “freeze” procedure, a canonical system of equations is obtained - in the form of first-order differential equations with complex coefficients. To solve boundary value problems, the Godunov matrix sweep method is used.
Research Deplanacion Cross-Section, Related To Them
Size Under Torsion Fluctuation,
2020
Namangan engineering-technological institute
Research Deplanacion Cross-Section, Related To Them Size Under Torsion Fluctuation, Muradov Rustam Muradov, Abduvakhidov Mutakhkhirkhon Abduvakhidov
Journal of Tashkent Institute of Railway Engineers
In this work, the problem of torsional vibrations of rotating working bodies in the form of shafts is studied in case of violation of the assumption of flat sections under torsional strains associated with the peculiarities of torsion deformation of relatively short bodies. During torsional deformation caused by torsional vibrations, the initially rectilinear generators of the cylindrical surfaces of the shaft turn into screw curves of equal length. This causes the longitudinal displacements of their points and, as a result, the appearance of two types of deplanation of its cross sections. The first type of deplanation is associated with the …
Technology For Preparing A Fiber Filler From Rice Straw
And Analysis Of Its Interaction With A Modified Gypsum
Matrix,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Technology For Preparing A Fiber Filler From Rice Straw And Analysis Of Its Interaction With A Modified Gypsum Matrix, Anvar Ishanovich Adilkhodjayev, B.G. Igamberdiev
Journal of Tashkent Institute of Railway Engineers
The article presents research data on a composite material based on rice straw and construction gypsum. An overview of a method for preparing rice straw to increase the dispersion-reinforcing effect of the fiber filler is given. The results of the study of the synergistic effect of the “FremNanogis” modifying additive on the formation of the structure are presented.
Calculation Of Operational Suitability And Reliability Of Structures,
2020
Tashkent Institute of Design, Construction and Maintenance of Automotive Roads
Calculation Of Operational Suitability And Reliability Of Structures, Nodira Ziyayevna Saatova, Abdurakhman Asimovich Ishankhodjaev
Journal of Tashkent Institute of Railway Engineers
With the acquisition of independence of our Republic in the system of transport communications, great importance was attached to the qualitative improvement of the design, construction, and operation of aboveground structures. Many tasks have been performed to increase the reliability and strength analysis of these bridges. Along with these, improving methods for calculating the resource of artificial structures in the system of transport communications are required. The Strategy for the Further Development of the Republic of Uzbekistan, including the following tasks: "... implementation of targeted programs for the development and modernization of road transport, engineering, communication, and social infrastructures, ...". …
Estimation Of The Influence Of Cold Bridges On The Heat-Shielding Properties Of The External Walls Of Residential Buildings,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Estimation Of The Influence Of Cold Bridges On The Heat-Shielding Properties Of The External Walls Of Residential Buildings, Elena Vladimirovna Shchipacheva, Rakhmatullo Pirmatov, Makhina Turdalieva
Journal of Tashkent Institute of Railway Engineers
Most of the existing multi-apartment residential buildings in Uzbekistan have external enclose structures with thermal performance that do not meet modern requirements. This is due to the design features of encloses in seismic areas of construction, necessarily including monolithic elements - anti-seismic belts, cores, frame elements and stiffeners. These elements, providing strength, rigidity and stability of structures, are at the same time powerful heat-conducting inclusions in warmer wall masonry materials. The article presents the results of theoretical and experimental studies on the estimation of the influence of cold bridges on the heat-shielding properties of external heat-technical inhomogeneous walls of civil …
About The Influence Of Some Recipe-Technological Factors On The Properties Of Non-Autoclave Gas Concrete,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
About The Influence Of Some Recipe-Technological Factors On The Properties Of Non-Autoclave Gas Concrete, Anvar Ishanovich Adilkhodjayev, S.S. Shaumarov
Journal of Tashkent Institute of Railway Engineers
This article presents the results of experimental studies on the production of cellular concrete with increased strength properties and improved indicators of the coefficient of structural quality. The use of the proposed composition will allow you to dispose of waste concrete and reduce production costs.
Research Of The Possibility Of Using Waste Of Paint And Varnish Materials For Anti-Corrosion Protection Of Metal Parts Of Transport Equipment,
2020
Tashkent Institute of Design, Construction & Maintenance of Automotive Roads
Research Of The Possibility Of Using Waste Of Paint And Varnish Materials For Anti-Corrosion Protection Of Metal Parts Of Transport Equipment, Aida Barxanadjyan, Ravshan Hakimov, Botir Ibragimov
Journal of Tashkent Institute of Railway Engineers
This work is devoted to the corrosion protection of metal parts of transport equipment. The purpose of this study is the use of waste paint and varnish materials (PVM) to obtain anti-corrosion coatings of metal parts. PVMwaste is the loss of paints obtained when painting automobiles. The epoxy polyurethane oligomer synthesized by us was used as a binder resin. During the research, the physicochemical properties of the waste were studied the components were selected to obtain anticorrosive mastic. The resulting mastic was tested in laboratory conditions in accordance with the standards for adhesion, chemical resistance, film strength in bending and …
Production Of Building Materials Based On Waste Industry,
2020
Tashkent Institute of Architecture and Construction
Production Of Building Materials Based On Waste Industry, Uchqun Abdullayevich Gaziyev
Journal of Tashkent Institute of Railway Engineers
The article describes the production technology of building materials based on industrial waste. Innovative technologies in the production of building materials, using industrial waste, are fully consistent with the research carried out at the Department of Technology of Building Materials, Products and Structures of the Tashkent Architectural and Construction Institute under the scientific supervision of the author of this article. Scientific developments in innovative technologies were carried out in several areas in the field of building materials and products. Based on the waste from the Angren coal deposit and local rocks, quartzite and dacitic porphyry, a gravel-like porous aggregate has …
Technology Of Application Of Mechanical Joints Of Reinforcement In The Construction Of Towers Made Of Monolithic Reinforced Concrete,
2020
Urgench state University
Technology Of Application Of Mechanical Joints Of Reinforcement In The Construction Of Towers Made Of Monolithic Reinforced Concrete, Kadir Karimovich Akhmedov
Journal of Tashkent Institute of Railway Engineers
Today, more than 3,000 skyscrapers have been built in the world, a third of which were built in China (including Hong Kong and Macao). The rest are located in the United States, Japan, the UAE and other countries, and every year more and more countries join the “sky club”. Uzbekistan also seeks to join this club and construction of the first NEST ONE skyscraper in Tashkent has begun. High-grade steel, concrete and a safe elevator are the true creators of the high-rise boom. In particular, reinforced concrete and the development of technologies for working with it contributed to the increase …
Metal Wooden Spatial Rod Construction From Composition Wooden Elements,
2020
Ferghana Polytechnic Institute
Metal Wooden Spatial Rod Construction From Composition Wooden Elements, Narimonjon Sultanbaevich Tursunov, Sobirjon Juraevich Razzakov
Journal of Tashkent Institute of Railway Engineers
Metal wooden spatial core structure, including upper and lower grids, braces, combining the nodes of the upper and lower grids, and vertical strands, characterized in that, in order to ensure redistribution of forces and uniform load of structural elements and giving additional stiffness compressive composite small-sized boards of the upper belt and the lower metal belt with a special tensile nut to give the building a structural lift, are displaced in plan relative to each other by 45 °, while the braces in the nodes of the grids are located mutually perpendicular and in one direction they are made descending, …
Structure Formation Of A Cement Stone With A Zeolite Containing Filler (Natrolite) And A Superplastificator,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Structure Formation Of A Cement Stone With A Zeolite Containing Filler (Natrolite) And A Superplastificator, Anvar Ishanovich Adilkhodjayev, Ilkhom Abdullaevich Kadyrov, Kadyr Saparbaevich Umarov
Journal of Tashkent Institute of Railway Engineers
The article presents the results of studies of the hydration process of the compositions "cement + zeolite-containing rock + superplasticizer" using the methods of IR spectrometry, differential thermal analysis. The scientific and practical significance of the work results for building materials science and the construction industry is to establish the effectiveness of the use of complex additives in the preparation of cement concrete.
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan,
2020
Fergana Polytechnic Institute
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan, Ibrohim Numanovich Abdullaev, Zhamoldin Dzhalalovich Akhmedov, Bakhodir Kushakovich Rakhmanov, Ruzikhon Toyirzhanovna Zhurabaeva
Journal of Tashkent Institute of Railway Engineers
In the world, the use of synthetic woven tapes (SWT) is increasing in various areas of life, including in construction. In particular, thanks to the development of production of high-strength synthetic fibers in such developed countries as Russia, USA, Germany, progress has been made in the creation and manufacture of heavy-duty lifting slings from STL, and on this basis to improve ergonomics and safety of installers, the safety of transported goods, the reduction of labor input and material on the load capacity.
Investigation Of The Longitudinal Hijacking Force From Friction Braking,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Investigation Of The Longitudinal Hijacking Force From Friction Braking, Makhamadjan Mirakhmedovich Mirakhmedov, Gali-Askar Rustamovich Khalfin
Journal of Tashkent Institute of Railway Engineers
On the elements of the longitudinal profile, when the train is decelerated from friction, an additional force of theft occurs. By modeling the braking process, the dependence of the driving forces on the braking friction is close to linear. The result of theft also depends on the power of the anti-theft system, namely, the force of pressing the fastening terminal to the rail, the weakness of which can subsequently affect the safety of trains and cause the track to be thrown out.
Method For Evaluating The Residual Resource Of Long Designs,
2020
St. Petersburg State Transport University Emperor Alexander I, 190031, Russia, St. Petersburg, Moskovsky av., 9
Method For Evaluating The Residual Resource Of Long Designs, Sergey Vladimirovich Chizhov, Ulugbek Zabixullayevich Shermuxamedov, Sharofat Shavkatovna Kadirova
Journal of Tashkent Institute of Railway Engineers
The article describes a method for calculating the safety of extended structures, in particular tunnels. The probabilistic approach to solving the problem is analyzed using the reliability of the structure with the probability of failure-free operation and assessment of the residual life of the structure. These characteristics make it possible to predict the residual life of the structure within a time value until the design has exhausted its ultimate state. An assessment of the operational reliability of the structure is carried out by measuring and establishing existing structural defects. Based on the data obtained, an analysis was carried out and …
About The Technology Of Making Reinforced Concrete Sleep By Heating Concrete At Low Temperature,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
About The Technology Of Making Reinforced Concrete Sleep By Heating Concrete At Low Temperature, Turgunbaev Urinbek Jamolovich, Movluda Umirova
Journal of Tashkent Institute of Railway Engineers
The article discusses the properties of cement stone with the use of complex chemical additives to improve the technology for the production of sleepers from prestressed concrete. With the use of superplasticizer, the volume of intergranular space and, consequently, capillary porosity, which is a determining factor for both strength and frost resistance and corrosion resistance of concrete, are significantly reduced. Also, during thermo-wet processing, at a temperature of 40 ° C, there was no decrease in the strength of cement stone and sufficient strength at the initial stage of the curing period, 36 MPa with the addition of Glenium 27 …
About Properties Of Modified Gypsum Compositions With Slag Filler And Chemical Additive,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
About Properties Of Modified Gypsum Compositions With Slag Filler And Chemical Additive, Jumagul Raximberdievna Turgunbaeva
Journal of Tashkent Institute of Railway Engineers
The article presents the results of experiments to assess the effect of slag filler and chemical additives on the physical properties of the modified gypsum composition. In particular, it was shown that the water demand of building gypsum increases with an increase in the content of metallurgical slag in the composition. With its constant amount, an increase in the proportion of GLENIUM 27S superplasticizer additive does not affect the normal density value of the gypsum dough. This suggests that the presence of a plasticizing effect from the introduction of superplasticizer GLENIUM 27S. In addition, filling gypsum with metallurgical slag with …
Experimental Research Methodology For The Crack Resistance Of Large-Panel Buildings In Seismic Areas,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Experimental Research Methodology For The Crack Resistance Of Large-Panel Buildings In Seismic Areas, Nigmat Baxramovich Shaumarov, Ulugbek Xakimovich Abdullayev
Journal of Tashkent Institute of Railway Engineers
The experience of the Tashkent, Spitak, Kyrgyz and Kamchatka earthquakes of recent years has led to the conclusion that there is a sufficient good seismic resistance of large-panel buildings with a narrow step of transverse load-bearing walls. One of the distinguishing structural features of buildings is considered to be the overlapping of individual multi-hollow panels with their support on special cantilevered outlets along the lateral surfaces of the transverse walls. Elements of the outer walls were made of expanded clay concrete with a compressive strength of about 200 kg / cm2. All structures were reinforced with flat welded frames made …
Investigation Of Way Embankment Stability On Movement Of High Speed Trains,
2020
Tashkent Institute of Design, Construction and Maintenance of Automotive Roads
Investigation Of Way Embankment Stability On Movement Of High Speed Trains, Mirzakhid Khamitovich Miralimov, Shakhboz Ulugbekovich Normurodov
Journal of Tashkent Institute of Railway Engineers
In this paper is considered the problem related with a stressed state of railway embankments taking into account of dynamic loadings from high-speed trains. In the offered technical method is giving wave nature transmissions of dynamic loading from the passenger trains and their interaction of soil layers with various parameters. The design procedure gives a clear physical and mathematical pattern, where all formulas are in detail shown and simple for understanding. Calculation is conducted numerically in two stages. Considering from classical principles of structural mechanics, the first calculation stage of the railway structures includes deformation of the railway sleepers taking …
Research Of Properties Of Composite Elastomeric Material Filled With Montmorillonite Of Karakalpakstan With Nanoparticles,
2020
Tashkent Institute of Railway Engineers, Tashkent, 100167, Uzbekistan
Research Of Properties Of Composite Elastomeric Material Filled With Montmorillonite Of Karakalpakstan With Nanoparticles, Bakhadir Bakhramovich Kakharov, Akhmadjan Ibadullaev, Elmira Ubaydullayevna Teshabaeva, Marziya Begdullayevna Muftullayeva
Journal of Tashkent Institute of Railway Engineers
The paper presents the results of studies on the effect of montmorillonite of Karakalpakstan with nanoparticles on the specific properties of composite elastomeric materials based on a mixture of rubbers SKMS-30 ARKM-15 (70%) and SKN-26 (30%). It was found that with an increase in the filler content in rubber, the recoverability of the rubber compound after deformation is significantly reduced. Moreover, the ability of the system to accumulate the energy of elastic deformation, i.e. the swelling of the extrudate (Re), largely depends on the specific geometric surface (Ssp) of montmorillonite of Karakalpakstan. Studies of the properties of rubbers showed that …
