Fire-retardant gypsum solutions on exfoliated vermiculite were studied using volcanic ash and the multi-functional additive D – 5. It was revealed that the introduction of the D-5 additive by weight from the binder significantly speeds up the setting time of the composite gypsum solution on the expanded vermiculite. gypsum-vermiculite solutions with additives of Portland cement and D – 5 have a higher water resistance.The compositions of composite gypsum solution on exfoliated vermiculite and ash have been developed. It has been established that volcanic ash of a fraction of 0.0–0.315 mm can be replaced by expanded vermiculite without a noticeable increase in average density. Additives of Portland cement and D – 5 increase the strength of the gypsum composite vermiculite solution with ash, the softening coefficient of the composite increases to 0.75.

Keywords: gypsum, portland cement, expanded vermiculite, volcanic ash, additive D-5, fire protection, gypsum vermiculite solution, tensile strength at bending and compression, average density, softening coefficient

Fibroenothobetons with the use of sawing volcanic tuff were investigated. The compositions of fibropenot phobetons with the use of nylon and basalt fibers have been developed, which allow to significantly reduce shrinkage deformations and increase the strength characteristics of foam phobeton. The maximum increase in compressive strength by 38% and during bending by 110% is observed in samples of fibroenophoto concrete with a reinforcement of 0.6% by volume with basalt fibers. The combination of nylon and basalt fibers is more effective for reducing the shrinkage of foam photon concrete compared to mono-reinforced samples.

Keywords: portland cement, tuff sawing waste, Neopor 400 frother, nylon and basalt fiber, polyheating, foam concrete, fibroenote sand concrete, bending and compression strength, shrinkage

The dependence of influence of size of a bend on tensely strained state of load-bearing frames of a covering is analysed. On the basis of the received results the maximum corner of a bend of the metal corners reducing a carrying capacity of farms is defined.

Keywords: a rafter farm, bend, tensely strained state, a moment of inertia, a radius of gyration, a barycentre

The dependence of the strength of concrete on the bulk density of cement is analyzed, taking into account the length of storage time, which can be easily determined in the conditions of the construction site.The mechanism of accelerated strength analysis of concrete structures, which is based on the bulk density of cement, is developed and proposed. The mathematical dependence is revealed

Keywords: cement bulk density, concrete strength, cement, concrete, mathematical dependence

Porous concrete is a new type of concrete with high permeability of water flows. It is advisable to use this type of concrete in road construction for the device filtration zones. This will allow to remove water from the carriageway, especially in places where there is no storm sewer. Infiltration of water flows through concrete pavement coatings contributes to their rapid removal from the surface, reducing slipperiness and water planning. The use of macroporous concrete will minimize flooding of car parks and roads. The results of the study confirm that permeable concrete surfaces function stably over time and are not silted with sand and soil.

Keywords: porous concrete, permeable surface, filtration, storm sewage, water

The article is devoted to elaboration of the method of comparative analysis of steel corrugated web beams and I-section beams. For greater reliability of comparison beams with different width and thickness of the belts were considered. The comparison was carried out for 6 and 9 m spans at different values of load intensity. As a result of the study, graphs showing the dependence of normal stresses and metal content on the load value were obtained. The study allows to conclude that the efficiency of the application of corrugated web beams increases with increasing load, for small values of the distributed load, the forces in the usual profile will be less, but in all cases the corrugated web beams are more effecient in terms of metal content.

Keywords: sin-beam, corrugated web beams, steel design, analysis, efficiency of application

The article discusses the use of reinforced polymer fibers in architectural and structural design of bridges on the example of structures in the Netherlands. The chemical structure of this material is presented - a polymer matrix reinforced with natural or artificial fibers. A brief historical background of the use of composite materials is given, a comparative analysis of structures made of new construction material and the traditional one is carried out. The problems and possibilities of this relatively new material are discussed. The variants of constructive solutions for the bridge construction of a new generation are proposed. The basic methods for the production of bridge components that meet aesthetic and economic requirements are described: the use of modular elements of the edges of the flooring, the construction of smart formwork and monocoque structures. The physicochemical properties of polymeric materials have been studied in detail, of which it is currently possible to manufacture reinforcement for bridges. In conclusion, the analysis of the effectiveness of the use of this material in architecture and construction over the past decades has been carried out and suggestions have been made about the future vector of the study and application of polymers.

Keywords: biocomposites, bio-resins, composite materials, lamination, monocoque structures, bridge deck, bridge construction, pultrusion profile

The article presents a study of modern achievements in the field of 3D printing of buildings and building components. The introduction describes a brief history of this technology. 3D printing technologies, in comparison with traditional building construction technologies, can be considered as an environmentally safe derivative, giving virtually unlimited possibilities for the implementation of geometrically complex projects. This article described two types of technology, and also noted that Contour Crafting is a promising technology that can revolutionize the construction industry in the near future. A brief description of several examples of innovative use of 3D printing in construction is presented. At the end, conclusions were made, tips and predictions were given on the use of 3D printing technology.

Keywords: architecture, 3D printing, printer, stereolithography, automation

The article is devoted to the process of air pollution as a result of the production and application of paints and varnishes used in the construction industry. In the process of pollution in the air enters the polluting aerosol (toluene), which is a toxic substance. The whole process of pollution is considered step by step, where at each stage the contaminating aerosol changes its parameters of properties. The result of the analysis of the pollution process is a physical model and mathematical dependence describing the essence of this process.

Keywords: environmental safety in construction, air pollution, toluene, pollutants, acrylic copolymer, the formation of pollutants, the release of pollutants, the spread of pollutants

This article discusses the main problems faced by experts in the construction and technical expertise of real estate. The measures that can improve the quality in the performance of judicial construction and technical expertise are considered.

Keywords: optimization, judicial construction and technical expertise, litigation, major problems, construction contract, construction and installation work, completed

Presented and theoretically justified ways of improving the technology of centrifugation, to increase the uniformity of the concrete structure in the cross section, for example, by way of separate introduction of the components of concrete, the essence of which in the manufacture of spun goods consists in the introduction into the molding unit prior to the stage of compaction of coarse aggregate. The results of physical and mechanical tests of centrifuged concrete, showing that the layer-by-layer introduction of the concrete mixture components by the first method leads to an increase in the compressive strength in all layers of centrifuged concrete

Keywords: concrete, centrifugation, uniformity of structure, layer-by-layer introduction of components, compaction, water absorption at capillary suction, strength

Offers on the rational organization of control of durability of concrete according to GOST 18105 for modular products, commodity concrete mix and monolithic designs are presented. The concept of "moving analyzed period"is introduced. It is shown that it is not reasonable to use the control scheme for the control of the indirect indicators and the development of rapid methods for assessing the strength of concrete in the control of commercial concrete mixtures. The rational organization of concrete strength control of monolithic structures using direct and indirect methods is proposed. The groundlessness of application of statistical methods of control at control of durability of concrete of monolithic designs is shown.

Keywords: control of the concrete strength, the analyzed period, the control scheme, the actual concrete strength

The paper considers the existing analysis of traffic at the intersection of Ave. Lenina - st. Koroleva. A new scheme for the organization of traffic at the intersection is proposed, the calculation of the traffic light cycle is carried out, taking into account the introduction of new traffic lights. The results of the research will allow solving a number of problems of the road complex of the city of Donetsk to improve the transport and operational status of the existing network of public roads of local importance and the structures on them, bringing the technical parameters and the level of engineering equipment of the roads in line with the achieved traffic intensity.

Keywords: road safety, traffic management at the intersection, traffic light traffic control

The paper considers the existing analysis of traffic at the intersection of Ave. Lenina - st. Maxim Gorky. A new scheme for the organization of traffic at the intersection is proposed, the calculation of the traffic light cycle is carried out, taking into account the introduction of new traffic lights. The results of the research will allow solving a number of problems of the road complex of the city of Donetsk to improve the transport and operational status of the existing network of public roads of local importance and the structures on them, bringing the technical parameters and the level of engineering equipment of the roads in line with the achieved traffic intensity. The article was published as part of the implementation of the program of the International Forum "Victorious May 1945".

Keywords: road safety, traffic management at the intersection, traffic light traffic control

" The analysis of the influence of superplasticizers based on polycarboxylates on the formation of physical and mechanical properties of concrete under thermal influence. It is established that the high efficiency of the steamed self-compacting concrete with polycarboxylate-based superplasticizers is achieved at low-temperature modes of heat treatment. Rational mode of heat treatment of concrete should be assigned to the quality parameter established by the results of experimental studies. Article is published within implementation of the program of the International Forum «Victorious May, 1945»."

Keywords: construction materials producing industry, unburnt synthanite, apparatus with vortex layer, innovation, commercial soundness of investments, investment prospects, method of variation of parameters, uncertainty

"Abstract: Considered the challenges of providing improved water hydraulics, hydraulic structures. Proposed advanced technology preparation of riverbed channels and stacking lining сoncrete with film cladding on their surface, taking into account the requirements of modern engineering hydrology. Proposed solution to a technological problem to improve the design of channels through the device of combined lining сoncrete with film lining that ensures water-resistance wall channels and their durability, increase the reliability and security of channels as well as rational use of water resources. The developed technology takes into account the increased requirements to the preparation of the internal cross section of the channel to the project parameters and marks. Recommendations on application of the technology of manufacture of works involving technological complex of machines for lining concrete slabs channels with different depths, widths on the bottom and laying the slopes that will improve hydraulics waterworks-irrigation canals is due to reduction of hydraulic resistance in rivers. Describes the operation and production costs of the works that speak of improving the economic benefits of the proposed technology.

Keywords: Keywords: Hydrology, irrigation channel, lining сoncrete with film, watertight arrangements, excavator, paver tiles, course, slopes, ground engaging body profiler, dam, bucket excavator

The article contains information about the formats, types, advantages of banner advertising, made analysis of errors that allow developers and customers, developed a General principle of successful visualization of banner advertising for the tourism sector.

Keywords: banner advertising, banner, tourism, offer, Internet, advertising, efficiency, layout, layout, rule of thirds

The article deals with the problem of pedestrian crossings and congestion of highways of the city of Volgograd. It described the situation on the highways and solutions to eliminate congestion on the road. Car traffic was conditionally divided into 3 categories: transit, the transit from the center and the car flow moving into the center. Studied the question of the safety of pedestrians on the road, because, except for pedestrians with the intersection increases their safety. The study and analysis of all previously implemented measures was proposed construction of underground pedestrian tunnels. Several embodiments of tunnel junctions have been considered. Analysis of the current transport situation revealed the busiest places in the city center.It was noted that the construction of underpasses solve the problem of vehicular traffic in the city center and pedestrian safety, and the city will have new underground space.

Keywords: Сar flow,highway, tunnel transition, transit transport, carriageway, longitudinal,security,road traffic

The article deals with the construction and definition of the stress-strain state of the design scheme of a lattice tower-like structure in the form of a mesh hyperbolic paraboloid. The dependence of the wind load distribution on the characteristics of the form is established, a sectional calculation method for such structures is given.

Keywords: Hyperbolic paraboloid, finite element method, aerodynamic loads, lattice towers

The article discusses the dynamic characteristics of mineral wool materials (dynamic modulus of elasticity and stiffness, reduced dynamic stiffness) and the effect on them of porosity and relative deformation of the material. The main objective of the study is to determine the value of the dynamic modulus of elasticity, taking into account its change with time under the action of a long-term static load for calculating the impact noise insulation.

Keywords: mineral wool material, dynamic modulus of elasticity, strength of parts of a structure, sound insulation, ultimate states, construction

The article deals with the process of spraying immiscible liquid media with a disk spray. A mathematical model for determining the dispersion characteristics of spraying is proposed.

Keywords: liquid, atomization, flow, speed, dosing

Karst processes are one of the most dangerous natural and man-made processes. Due to the significant spread of karst in Russia, the assessment and monitoring of karst risks is an urgent problem. The solution to this problem may be the creation of a service to monitor karst processes taking place in the cities. The influence of karst processes is determined by the type of karst hazard. Karst danger of the territory is estimated on the basis of its complex studying with use of various engineering-geological methods. Given the significant costs of eliminating the consequences of karst failures, it is advisable to organize work on the prevention and monitoring of dangerous geological processes. The basis of this work will be the creation of an information system of the geological situation of the territory. This information system is implemented in three stages: 1. Establishment of regularities of karst development in the territory and determination of sequence of research by geophysical methods. 2. Collection of data on the geological situation, as well as the preparation of a program of permanent monitoring of the territory. 3. Programming and entering the data into the information system, which allows the formation of new maps and forecasts. The introduction of this information system will determine the area of potential development of the karst, thereby reducing the economic and environmental damage caused by these processes.

Keywords: karst, karst processes, karst danger, karst forms, karst channels, karst massif, failure, subsidence, monitoring, geological situation

The use of ultrathin sand as the main raw material in the production of concrete made by semi-dry molding is relevant for many regions of Russia due to the lack of sand with a high modulus of grain size and solid stone. The article presents the results of the analysis of the possible use of sands with a modulus of particle size Mcr = 0.8-1.4 in pressed small-sized concrete paving products for sidewalks. Replacing ordinary sand up to 80% with fine-grained does not reduce strength and performance properties. The transition to fine-grained and silty sands reduces the cost of production.

Keywords: concrete, semi-dry pressing, knitting, ultra-fine sand, hyper-plasticizer, strength

This article discusses the basic principles of the use of structural membranes in the reconstruction of buildings and structures. Three principles of intervention in the existing architecture are described in detail. The first is to preserve the historical appearance and character of the building. The second is the scale of the new and old parts of the building. The third is the difference and the possibility of reorganizing new designs. The characteristics of the goals, the achievement of which each of these principles is directed, are given. Using the example of several buildings, we analyzed the use of textile membranes to achieve the main goals of reconstruction, described the positive and negative aspects of restoration using textile membranes. These buildings include: a church on a hill in Corbera d'Ebr, Spain (roof restoration), the central courtyard of the Palacio de Mineria, Mexico (creating coverage over a yard area), Salzburg residence, Austria (sliding roof). In conclusion, conclusions were made about the advantages of using membranes for the preservation of historical heritage and possible prospects for the development of fields of application of this design.

Keywords: architecture, membranes, reconstruction, restoration, structural structures