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

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

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

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

Issues related to the safe operation of the transport system as a whole. The article touches upon the questions on how to repair the car in Volgograd. In the city, this guide is the only link in the area. Long-term operation of the overpass led to the accumulation of a large number of defects and damages that prevented it from being fully used. Accounting for all aspects of the safe use of the way to ensure its sustainable functioning. The measures ensuring the safe operation of transport facilities include: increasing the dimensions of the roadway of the overpass, strengthening structures to increase the carrying capacity to normative work, processing and storing seismic precipitation on the span, installing a video camera for rapid response in case of traffic accidents and illegal actions. To increase the load-bearing structures, the new beams should be replaced with new beams, designed for high loads, and also use composite reinforcement with carbon fiber.

Keywords: safety, load-carrying capacity, reconstruction, bridges, sustainable functioning, reinforcement, diagnostics of structures, waterproofing

The article deals with the calcalation, simulation and experimental study of the filter on quater-wave resonators of the range 2 - 4 GHz. The resulting losses in the pass band are of about 1 dB and stop band on the second harmonic is 50 dB. The good coincidence between the simulation results and experiment is shown.

Keywords: filter, quarter-wave resonator, calculation, modeling, experiment

In this article the necessity of improvement of embankments retaining walls concreting technology is substantiated. The research results of falsework material influence on grinding layer properties of monolith construction are adduced. The methods of concrete protective layer durability improvement and surface decorative relief forming are suggested. This method is recommended for usage in building and reconstruction of retaining walls superelevation of city embankments.

Keywords: hydraulic structures, embankments, retaining walls, flexible falsework, rustic stone forming, concrete curing

In the article discusses the features of work air handling unit (AHU) based on spray chamber (SC), developed the design of the test bench and presents the results of the tests SC, identify ways to improve them, particularly in the lower part of the workspace was placed plane-parallel packing. It was established experimentally that the efficiency of processes of heat and moisture transfer increased by an average of 6 - 10%.

Keywords: air handling unit, spray chamber , heat and mass transfer, efficiency

The results of large-scale field experiments to study the interaction of the bases with different shapes and sizes of the protrusions at the bottom with an inhomogeneous loess foundation . It is shown that the protrusion at the base of a significant effect on the VAT base .

Keywords: foundation , stress, strain , stamp , eccentricity , mean pressure

In the article the main types of corrosion of concrete, such as chloride, sulfate, acid and carbon dioxide, are considered, the mechanism of cement stone damage is given. The danger of leaching of concrete is shown. Protection of bridges from penetration of aggressive moisture is waterproofing. Materials used for the device of waterproofing in our country are given, their advantages and disadvantages.

Keywords: Waterproofing bridges, carbon dioxide corrosion, chloride corrosion, acid corrosion, concrete leaching, waterproofing materials, adhesion

The general equations of the moment theory of a circular cylindrical shell with creep are considered: static, geometric and physical. We solve the problem of determining the stress-strain state of a shell rigidly clamped in the base when an internal hydrostatic pressure acts on it. The problem has reduced to a linear nonhomogeneous differential equation of the fourth order with respect to deflection. The solution was performed numerically by the finite difference method in the Matlab software package. As a law of connection between creep strains and stresses, the generalized nonlinear Maxwell-Gurevich equation was used. To determine the creep strains, a linear approximation of the first time derivative was used. The shell was made from secondary PVC, and as a result, it was found that in the process of creep in the shell, the circumferential stresses increase by 15%.

Keywords: cylindrical shell; creep; moment theory; polymers; finite difference method

The article is devoted to the results of studies of the initial modulus of elasticity of tuffs on natural porous aggregates of Kabardino-Balkaria, with compensated shrinkage with prepared additives, both in quartz and tuff sands. The article presents the results of experiments on determining the initial modulus of elasticity of tuffs of different preparation formulas. The values ​​of the correction coefficients in the well-known formula for the dependence of the initial modulus of elasticity of lightweight concrete on its cubic strength and the volume weight of dry concrete, depending on the formulation of tuffs are proposed.

Keywords: Modulus of elasticity, tuffs, light concretes, porous aggregates, tuff, tuff sands, compensated shrinkage

The model of a numerical estimation of information contents of the Internet sites, based on the thematic analysis of texts is considered. The estimation is made with use of the private qualitative criteria corresponding accepted to "values of a society». On the basis of the expert analysis and sociological interrogations sets of criteria for an estimation of a thematic accessory of Internet sites are formulated. Numerical value of conformity turns out with use of statistical methods of the thematic analysis. For the analysis sets of the linguistic keys corresponding to formulated criteria are used. The received result is used for reception of the generalised rating of the site establishing its social importance.

Keywords: thematic analysis, site rating, value of a society, ranging, linguistic key

We describe the design of a directional microphone and a methodology for conducting the tests. In a controlled motion lane highway conducted field observations made by the authors microphone. As a result of the simulation is determined relative measurement error. It is shown that in order to reduce relative error detector transport recommended in 30-100 m behind the traffic lights, since the start of the vehicle the sound coming from the car, increases. Within the measurement error of 12%, a passive acoustic detection of transport, can be applied in the total intensity on the stretch of road that does not exceed 400 vehicles / h.

Keywords: transport stream, transport noise, passive acoustic detector, directional microphone

Treatment methods of roadway covering with deicing product, including salt, reducing winter slipperiness, do not provide traffic safety at unpredictable drops in air temperature. Surface distribution of sleetproof materials covering pollutes the environment to a large degree and increases corrosive attack to metal parts of the car. The solution to this problem is the use of asphalt-concrete mixes with deicing properties.

Keywords: Stone-mastiphiс asphalt, SMA, icing additive, сoated ice adhesion, stabilizing additives, test lottman, national standart