Basalt Reinforcement Research Articles

CALCULATION OF STRENGTH OF FLEXIBLE CONCRETE BEAMS WITH BASALT REINFORCEMENT ON VERTICAL SECTIONS

This article presents the methods of calculating the fracture resistance of bending concrete beams with basalt reinforcement on vertical (normal) sections, the conducted research and the analysis of comparing the experimental results with the calculated results.

CALCULATION OF FLEXIBLE CONCRETE BEAMS WITH BASALT REINFORCEMENT

As a result of experimental research, this article presents test-experimental data on the occurrence of stress-deformation states of flexural concrete beams with basalt reinforcement under the influence of force.

Composite Physical - Mechanical Properties Of Bazalt Reinforcement And Comparison With Steel Reinforcement And Inspection For Flammability

This article discusses the effectiveness and scope of steel and composite reinforcement, their advantages and disadvantages, as well as a comparison of their main characteristics. Describes tests to determine the combustibility of basalt reinforcement, in order to determine the possibilities of its application.

ИССЛЕДОВАНИЕ ТРИБОТЕХНИЧЕСКИХ СВОЙСТВ КОМПОЗИЦИОННОГО МАТЕРИАЛА НА ОСНОВЕ АЛЮМИНИЕВОЙ МАТРИЦЫ АРМИРОВАННЫЙ СТАЛЬЮ ИЛИ БАЗАЛЬТОМ

The study objective is to evaluate the tribo-engineering properties of composite materials based on an aluminum matrix reinforced with steel or basalt in comparison with a material without reinforcement, and to develop a technology for obtaining such composite materials. Frames consisting of multidirectional fibers were used as reinforcing components: basalt wool (175-200 kg/m3 density); steel wool (4# class); melting temperatures of steel and basalt, which make up steel and basalt wool, are above 10000C, which makes it possible to pour aluminum without changing the aggregate state of reinforcing frames. The percentage of reinforcing components by weight is 4-5%. Deformable AB aluminum alloy was used as a matrix, which differs from the alloys of Al-Mg-Si system because of its higher level of tensile and yield strength. The composite materials under study were obtained by the liquid–phase method - casting according to melting models. Tribo-engineering properties were tested on a friction machine in the medium of Lukoil standard 10W40 SF/CC engine oil. To determine the anti-wear properties, tests were carried out for 1 hour, and to determine the antisize properties and the seizure load, tests were carried out with a constant increase in the load on the friction unit. The assessment of anti-wear and antisize properties was carried out by comparing the values of wear spots and seizure loads. It is found that the anti-wear properties increase by 76-85% when reinforcing samples with basalt wool and by 46-76% when reinforcing with steel wool in relation to an unreinforced sample. Antisize properties increase with basalt reinforcement by 23%, and decrease by 7% with steel reinforcement. Studies on assessing tribo-engineering properties of samples obtained by casting from AB aluminum alloy reinforced with basalt and steel have shown an improvement in anti-wear and antisize properties in relation to samples from AB alloy without reinforcement.

Basalt grid reinforcement of cement-bonded particleboards

This study focuses on the effect of basalt fiber reinforcement of cement-bonded particleboards (CBPB) with a target density of 1200 kg m-³ in terms of the compatibility with cement and the change in mechanical properties compared to conventionally produced boards. The modulus of rupture (MOR) and modulus of elasticity (MOE) were increased for all wood-cement ratios compared to the corresponding boards without basalt grid. Reinforcement with basalt grids significantly increased the strength-to-weight ratio (SWR) of the CBPB with various wood-cement ratios, due to the high tensile strength of the basalt grid. Simultaneously, the addition of the basalt reinforcement layer did not reduce the internal bond strength (IB). By using a basalt grid as reinforcement material, it is possible to counteract the negative effects of a higher wood particle content and even produce boards with increased bending properties. Basalt reinforcement could therefore be a good way to produce higher-strength panels and counteract the loss of strength due to the addition of wood particles.

Accelerated weathering of sustainable and micro-filler Basalt reinforced polymer biocomposites: Physical, mechanical, thermal, wettability, and water absorption studies

This study intends to evaluate and comprehend the accelerated weathering behavior of various thermoset and thermoplastic composites loaded with an eco-friendly basalt micro-filler. Basalt incorporation into various polymer matrices is, in fact, a very innovative idea that might present some very exciting, as yet unexplored, perspectives. The four kinds of thermoset polymers (synthetic epoxy, bio-epoxy, polyester, vinyl ester) were reinforced with constant basalt reinforcement (30 wt %) and fabricated via the casting process. Whereas the three kinds of thermoplastic (polylactic acid, polypropylene, high-density polyethylene) polymers were also loaded with a constant basalt ratio and manufactured through an internal mixing process followed by a compression molding technique. The fabricated samples were employed inside the xenon arc light accelerated weathering equipment under ultraviolet (UV) rays, temperature, and humid conditions for 555.55 h as per ASTM G155-13 cycle 1. There is a significant improvement in the density of polymer composites due to highly dense basalt particle incorporation and maximum void percentage was observed in thermosets due to casting defects than in the thermoplastic samples. After weathering, the tensile, flexural, and impact properties of composites were significantly reduced due to the thermo-oxidative reaction and degradation under UV and moisture exposure. As a result of UV-induced chain scission, small fractures may develop. These spaces provide the ideal environment for moisture to infiltrate into the primary composite structures, weakening the links between the reinforcement and matrix. Scanning electron microscopy was used to analyze the significant changes in the surface morphology of weathered and unweathered tensile fractured samples. The hardness was considerably improved due to the presence of highly stiffen and hard basalt particles. The idea that accelerated weathering destruction creates hydrophobic surface characteristics in most of the composites due to a variety of factors, like physical and chemical transformations, is supported by the increased contact angle value and a decrease in surface free energy, particularly the polar section. The thermogravimetric analysis revealed that there is not much significant impact of weathering on composites, however, variations were observed in the thermomechanical analysis due to compatibility issues. It is observed that the onset and endset degradation temperatures got decreased with the reinforcement of 30 wt% basalts after the internal mixing process. This could be brought on by the molecular weight decreasing while mixing. The behavior of polymer composites in water absorption study is found to be unique depending on their hydrophilicity and defects raised during the fabrication.

Thermal analysis of sustainable and micro-filler Basalt reinforced polymer biocomposites for lightweight applications

For the past ten years, there has been a trend toward strengthening polymer composites with the help of natural fibers derived from plant and animal sources, which has led to ecological imbalance. Hence, to maintain the ecological balancing factors, the researchers and industrial experts are concentrating on the reinforcement of naturally available mineral materials in polymer products to minimize the polymer percentage and boost the economic feasibility of products with lightweight properties. In fact, incorporating basalt mineral into different polymer matrices is a highly creative notion that might open up some very interesting, uncharted territory. Basalt helps to create a pollution-free environment and balance ecological challenges by reducing the polymer ratio in the objects without many changes in their core properties. Basalt is desirable because of its outstanding thermal and mechanical characteristics, simplicity of processing, affordability, and lack of toxicity. Concerning these points, the current study aims to fabricate mineral particles (basalt)-reinforced (30 wt%) different polymers (synthetic epoxy, bio-epoxy, polyester, vinyl ester, polylactic acid, polypropylene, and high-density polyethylene) composite for lightweight thermal applications. The casting technique was used for the fabrication of thermoset polymer composites, whereas compression molding was employed to fabricate thermoplastic composites after an internal mixing process. The fabricated composites are subjected to thermogravimetric, thermomechanical, and dynamic mechanical analysis to analyze the thermal stability of the resultant composites. The Thermogravimetric analysis revealed that most of the samples exhibited good thermal stability with the addition of 30 wt% basalt fillers. As a result of moisture content as well as certain volatile compounds, if any, only a minimal weight loss in the range of 30 °C to 130 °C was seen at the early phase of heating for all neat and composite samples. The Thermomechanical analysis findings showed that basalt reinforcement at 30 wt% in synthetic epoxy, Polylactic acid, Polypropylene, and High Density Poly Ethylene polymers causes a reduction in dimensional variations up to 70 °C. This is because the basalt particles, particularly in the hard glassy area, limit the passage of molecules at lower temperatures. The higher stiffness of the basalt particles has significantly contributed to the viscoelastic properties of all the thermoset and thermoplastic composites. Because of the extreme closeness and thick packing of the components, which are in a dormant condition, the glassy areas in particular have a greater storage modulus. Based on these outcomes, these basalt-reinforced composites can be employed for lightweight thermal applications, which have the advantage of economic and eco-friendly features.

Potential applications of basalt fibre composites in thermal shielding

This present study demonstrates the applicability of basalt fibre-reinforced polymer (BFRP) composite materials in thermal shielding. Basalt fibres are produced from natural, sustainable sources and obtain comparable mechanical performance to commercial glass fibres. In addition to their mechanical strength, BFRPs have excellent chemical and heat resistance. Basalt fibres tend to have a higher thermal stability than their competitor glass fibres. The heat resistance of basalt fibres derives from the volcanic origin of the raw material basalt gabbro. These favourable features make BFRP composites an attractive group of materials for application in several industries. To test the fire resistance of the materials, we produced mono and hybrid composite plates from different types of basalt reinforcement structures (milled fibres, chopped fibres and woven fabric) and epoxy resin. Surface treatment with silane coupling agents significantly improved the mechanical and thermomechanical properties of BFRPs by up to 70%. Three-point bending tests were performed to determine the flexural properties of the composite specimens, and their fire behaviour was evaluated with a horizontal burning test, and a novel jet fire test assisted with infrared thermal imaging. Higher fibre content in hybrid laminates decreased the linear burning rate by 8%, and the maximum surface temperature was approximately 80 °C lower after jet fire impingement compared to woven reinforcement structure.

Chemical aspects of the application of basalt in cement composites

• Overview of main applications of basalt in cement composites is presented. • Chemical interactions of basalt with corrosive environments are described. • Chemical reactivity of various forms of basalt in cementitious matrices is assessed. • Gaps in the current knowledge are identified. • Suggestions for future research are formulated. Basalt belongs to materials widely used in engineering. Basalt-based products are common in civil engineering, automotive, or boat building, but they can be found, e.g., also in wind turbine blades or sporting goods. This paper is focused on the chemical aspects of the application of basalt in cement composites, a seemingly narrow area that was not surveyed in sufficient detail to date. At first, an overview of the main applications of basalt in cement composites is presented. The effects of active fillers, coarse aggregates, and various types of reinforcement on functional properties are analyzed using a set of characteristic examples. Then, the chemical reactivity of various forms of basalt in cementitious matrices is assessed. Mechanisms of chemical interactions of basalt with corrosive environments are described on a general level to provide a guide for such assessment. Consequently, the interactions of basalt in powdered or aggregate form and basalt reinforcement with the cement matrix are specified from a chemical point of view. Finally, suggestions for future research inspired by the revealed gaps in the current knowledge are formulated.

COMPATIBILITY OF REINFORCEMENT AND WOOD IN BEAMS WORKING ON TRANSVERSE BENDING

One of the ways to eliminate the negative shortcomings of wood (dependence of its properties on the structure, defects, the need for use and significant consumption of quality lumber, excessive mass of sections, creep under prolonged load, etc.) and increase technical and economic efficiency is reinforcement of solid and glued trees, steel or composite plastic fittings. This allows you to significantly reduce wood costs, reduce installation weight, improve the quality and reliability of wooden structures that work mainly on the bend.
 The expediency of reinforcing elements of solid or glued wood with steel and composite polymer reinforcement is substantiated. The rather high compatibility of wood work in the compressed and stretched zones of the bending element of steel reinforcing steel of classes A400C, A500C and composite fiberglass reinforcement, composite basalt reinforcement and composite carbon tape is shown. Reinforcement of solid and glued cross-sectional elements of wooden structures with steel or composite plastic reinforcement or tape can significantly reduce wood costs, reduce height and installation weight, improve quality and reliability.
 Analysis of the current state of research of reinforced wooden structures indicates the need for a thorough study of the bending of wooden beam elements with combined reinforcement of steel and composite reinforcement and with combined pre-stressed reinforcement. To date, the issue of studying the stress-strain state of reinforced wood in the "calculated cross section" of both the structure and the work of the material in its composition is insufficiently covered. The use of reinforced wood in structures is not regulated by most countries, so there is no general theory of calculation of reinforced wood structures, which would be based on sound clear hypotheses and assumptions and would be based on the basic principles of solid mechanics.

ANALYSIS OF THE USE METAL AND NON-METAL REINFORCEMENTS FOR STRENGTHENING WOODEN ELEMENTS AND STRUCTURES

Domestic and foreign experience in the use of metallic and non-metallic reinforcement to strengthen load-bearing wooden elements and structures in industrial and civil construction, as well as in engineering structures is analyzed. The main types of metallic and non-metallic fittings and their mechanical characteristics are characterized. A detailed analysis of steel and various types of composite reinforcement (basalt reinforcement BFRP, fiberglass composite reinforcement GFRP, carbon composite reinforcement GFRP, composite reinforcement based on aramid fibers).
 Currently, designers use reinforced steel, usually corrugated reinforcement, of such classes, which has a site of fluidity, to reinforce glued wood elements. Since the strength of reinforcement affects the load-bearing capacity of the reinforced element of wood, it is necessary to take it into account when designing such elements and calculate together. Therefore, it is rational to reinforce wooden elements and structures with the use of steels, the strength and elastic properties of which most fully correspond to the properties of wood.
 There are four types of composite reinforcement: fiberglass reinforcement (with glass fibers); carbon fiber fittings (with carbon fibers); basaltoplastic (with basalt fibers); organoplastic (with artemis fibers); organoplastic (with natural fabrics). The most common of them in construction are carbon, basalt and fiberglass. The main advantages and disadvantages of such types of reinforcement are given. Composite has the following advantages over metal: resistant to temperature changes, increases the service life of the structure, is not exposed to aggressive environments, light weight, durable, non-toxic, can be made of any length.
 In the future, there will be an attempt to use combined reinforcement to strengthen wooden elements and structures.

Flexural behavior and finite element analysis of waste tires steel fiber reinforced concrete beams with basalt reinforcement

Waste Tire Steel Fiber(WTSF) was used in different proportions (0%, 0.5%).1% and 1.5%) were mixed with ordinary concrete to produce WTSF reinforced concrete. Based on basalt fiber reinforced polymer and WTSF concrete, a new structural system, WTSF concrete beam with basalt reinforcement, is proposed. On the basis of the theory test, using the ABAQUS finite element software to simulate basalt rebar waste of the bending properties of steel fiber concrete beam, to obtain the stress nephogram, cracking load, ultimate bearing capacity, load deflection curves and crack location map, comparative tests and fitting results show that WTSF volume content 0% less muscle damage, 0.5% for balance, 1% and 1.5% are superreinforced failure. With the increase of WTSF content, both cracking load and ultimate bearing capacity are improved. Meanwhile, theoretical calculation formulas of relevant components are given to guide engineering practice.

Моделирование совместной работы арматуры с бетоном на примере композитной арматуры

The characteristics of modelling the combined action of reinforcement and concrete on the example of composite reinforcement are discussed. In the work, glass-fibre and basalt composite A-type de-formed reinforcing bars were considered. The studied samples of composite reinforcement comprised a power rod having an anchor layer, evenly distributed on the surface at an angle to its longitudinal ax-is. The anchor layer was manufactured from a thermosetting resin and a continuously reinforcing filler. A-type reinforcement is formed by pressing the reinforcing bundle into the power rod, while ribs are generated on the surface. The experiments carried out using concrete cubes having a rib size of 15 cm and prisms having a cross-section of 15×15 cm and height of 60 cm showed that the average val-ues of maximum adhesion strength of the studied reinforcement samples are comparable and meet the established standards. Conversely, the use of basalt composites has a negligible impact on the adhe-sion of reinforcement to concrete. This indicator is significantly affected by the configuration of the external profile of the rod. In addition, the uniform operation of the “reinforcement – concrete” system was noted. Due to the reinforcement profile used during the experiment, uniform and stable behaviour of the rod in concrete was achieved, as demonstrated by the stress-displacement diagrams based on the results of the pull-out test. The obtained adhesion of composite glass-fibre and basalt reinforce-ment to concrete allows general dependencies for calculating the anchoring of this reinforcement in concrete to be used.

Selection of Natural Fiber for Sustainable Composites Using Hybrid Multi Criteria Decision Making Techniques

Various factors like depleting non-renewable resources, increasing plastic pollution, awareness of environmental sustainability has resulted in the increased interest in sustainable composites as a potential to replace synthetic composites. As per the concurrent engineering approach, the material selection must be accomplished during the product design phase to meet customer demands in a time-efficient manner. Due to conflicting criteria, the wrong material selection often leads to an untimely failure of products ensuing in huge losses. As selection of materials is a complex process, the MCDM techniques play a significant role in judicious decision making. This study focuses on selection process of a natural fiber for sustainable composites using a hybrid integrated structure consisting of objective weightage methods (Entropy and CRITIC method) for calculating the criteria weights and the TOPSIS, VIKOR, and PROMETHEE II ranking methods. It's difficult to identify a single MCDM approach that is intrinsically beneficial than the rest, and every method has its own advantages and limitations. Hence the six ranking lists obtained are compared using Spearman's rank correlation coefficient. TOPSIS and PROMETHEE II methods with Entropy weighted criteria dominate the other approaches, and Basalt fiber surpassed the other fibers in the ranking list. The basalt reinforcement in composites finds its applications in fields of transportation, automobile and medical equipment. The sensitivity analysis has also been conducted and in all the scenarios basalt fiber has outperformed all other natural fibers under consideration.

Environmental Efficiency Aspects of Basalt Fibers Reinforcement in Concrete Mixtures

Modern building materials must fulfill not only functional performance criteria but also reduce the environmental impact accompanied by their production. Within the past decades, fiber-reinforced materials have been found to be promising and durable materials that can be utilized in various fields. Among a wide range of reinforcement types, basalt fibers have been introduced as an alternative to broadly used steel fibers. As informed by the available literature, benefits linked with less energy-intensive production indicate a very good potential application of this material in terms of functional properties and, at the same time, a reduction in environmental burden. However, only a very limited amount of information is available on the actual impact of using basalt fibers in terms of environmental impact. In order to fill this gap, the present study describes, using Life Cycle Assessment, the environmental impacts associated with the production of basalt fibers. In order provide a more reliable and coherent overview, an analysis combining functional and environmental indicators was performed. The presented results reveal that the use of basalt reinforcement provides a significantly lower environmental intensity per strength unit, especially in the case of compressive and flexural strength.

Current problems and prospects of application of products based on continuous basalt fiber

The progress of science and technology significantly depends on the success in creating new materials. Composite materials are a heterogeneous structure formed by a combination of reinforcing elements and isotropic binder (binder) material, currently widely used in various fields of technology. but for the economy is more important mass application. For this purpose, more thorough and long-term research and experimental implementations are carried out, which require significant intellectual and material costs. Development of structural elements using basalt fiber began in NDIBV since 1987. and experimental samples of prestressed concrete structures with basalt-plastic reinforcement. Research to identify the interaction of cement with basalt fiber and the design of effective concrete structures using basalt reinforcement. Concrete beams with basalt reinforcement were successfully tested. Unfortunately, the results of research have not been widely implemented. Therefore, this article is devoted to the problems of mass introduction into construction practice of various types of composite materials, including basalt reinforcement. The advantages and disadvantages of composite reinforcement in comparison with steel are discussed. During the theoretical and experimental studies, both positive and negative aspects of the use of basalt reinforcement were identified. So experiments have shown that basalt fiber loses strength in the environment of Portland cement stone. But this shortcoming has been overcome by the efforts of scientists, it is important to use certain defects of basalt fibers for specific conditions. There are the following main types of basalt fibers:
 1) basalt continuous fibers with a diameter of 8 - 11 microns, 12 - 14 microns, 16 - 20 microns with a fiber length of 25 - 50 mm and more;
 2) staple short fibers with a diameter of 6 - 12 microns and a length of 5 - 10 mm and several diameters;
 3) basalt superthin fibers with a diameter of 0.5 - 1 microns with a length of 10 - 50 mm;
 4) coarse basalt fibers with a diameter of 100 - 400 microns.
 To create structures with certain properties for specific conditions, appropriate basalt fibers are selected. According to the research results, recommendations and normative documents have been developed. Suggestions for measures to improve and successfully widely use composite elements for reinforcement of concrete structures.

Flexural Behavior of 3D printed Concrete Beam with Fiber Reinforcement

3D printing with concrete is a promising new method for rapid, low cost construction. The flexural strengths for reinforced/unreinforced and 3D printed/cast concrete Warren trusses were tabulated and the failure mechanisms were reported. The types of reinforcement used were rebar(basalt and steel), and mesh (basalt and aramid). The effect of loading geometry and loading speed was measured for basalt mesh and aramid mesh composite, respectively. Due to the expected variation in flexure between samples, it cannot be said whether small differences for various tests are significant. Variation stems from a microscopically uneven surface and random inhomogeneities in the bulk of the tested material which act as a microcrack catalyst and propagator. Since the tested beams are short specimens the numerical findings of other studies will vary based on the intended design. This paper is intended to assess the performance of various reinforcements in a qualitative sense by comparing basalt reinforcement with other reinforcements. It was found that cast beams tolerated deflection better but had a similar flexure strength compared as the printed beams. The steel and basalt rebar reinforced beams had the highest flexure strengths where the traditional steel rebar reinforcement outperformed the basalt in flexure by 36% and the basalt outperformed the steel in deflection by 40%. The basalt mesh outperformed the cast and printed unreinforced bars by a small margin but had only 25% of steel rebars’ deflection at maximum flexure strength. The aramid mesh tolerated the biggest deflection out of any sample at 2.26 cm.

Behaviour of concrete beams reinforced using basalt and steel bars under fire exposure

Basalt bars for concrete reinforcement, known as basalt fiber-reinforced polymers (BFRPs), are new natural inorganic materials with distinct mechanical properties that have been used recently in the construction field. Generally, the FRPs bars have no yield before the brittle failure as steel bars and their behavior, when exposed to fire, is still under investigation, this paper presents an experimental and theoretical study to get more knowledge about the characteristics and the fire resistance of a concrete beam reinforced using BFRPs and BFRPs mixed with steel bars. Eight half-scale concrete beams were constructed and tested up to failure at room temperature and under direct fire at 500 °C for 2 h. The basalt-to-steel percentage is the main parameter of this study. The BFRP-to-main-steel-bar replacement percentages are 100%, 67%, and 33% as three tension reinforcement bars were used. The results are discussed in terms of load capacity, cracking behaviour, and failure modes. Moreover, the experimental results are compared with theoretical calculations according to the ACI code and with numerical results obtained using the ANSYS finite element program. The results show that the beams with both steel and basalt reinforcement showed a better shear strength, enhanced crack stiffness, and lower degree of brittleness at failure. Our results also showed that the BFRPs beams yielded a better degradation resistance when the beams were exposed to fire as the failure load reduction factor for the BFRPs beam was 6.17% compared with that of steel beam which was 22.32%. More studies are needed to justify our observations in details and determine their applicabilities under different conditions.

Дослідження неметалевої композитної базальтової арматури періодичного профілю та перспективи її застосування

Дослідження неметалевої композитної базальтової арматури періодичного профілю та перспективи її застосування

Дослідження впливу зміни співвідношення вмісту сталевої та базальтопластикової арматури на показники міцності балок із гібридним армуванням

Introduction.The current stage of development of the construction industry is associated with the introduction of new materials into practice, compared with the «traditional» (steel, concrete, wood) have certain advantages in the form of improved strength, corrosion resistance, etc. These materials include non-metallic composite reinforcement.Problems Statement. The main disadvantage of non-metallic composite reinforcement (except for carbon fiber reinforcement) is significantly lower modulus of elasticity compared to metal reinforcement. This is the reason for the occurrence of excessive deformations in concrete structures, does not ensure the fulfillment of the requirements for the second group of limiting states. One of the ways to reduce the de-formations of concrete structures, without a significant increase in the percentage of reinforcement of the section, is the use of hybrid reinforcement, when reinforcement is performed simultaneously with metal and composite reinforcement. Currently, there is a very limited amount of experimental data on the stress-strain state of structures with such reinforcement.Purpose. Research of the stress-strain state of structures with hybrid reinforcement, establishing its effectiveness and the optimal ratio of the content of metal and composite reinforcement to achieve sat-isfactory strength and stiffness of a concrete structure.Materials and Methods. The work of beams under load, reinforced with basalt-plastic reinforce-ment, metal reinforcement (control series) and with hybrid reinforcement with metal and basalt-plastic re-inforcement simultaneously was researched. To find out the effect of changes in the content of basalt-plas-tic reinforcement in relation to metal on the performance of beams with hybrid reinforcement, various series of samples of beams with different ratios of basalt-plastic and metal reinforcement.Results. On the basis of the conducted studies, the nature of the work and destruction of concrete beams with hybrid reinforcement was assessed depending on the percentage of metal and basalt-plas-tic reinforcement. The strength indicators of concrete beams with hybrid reinforcement were obtained and analyzed. The test results showed that the strength of beams with hybrid reinforcement increased in comparison with beams of the control series and was at the level of beams reinforced with basalt-plastic reinforcement. At the same time, the deflections and crack width of the beams decreased.Conclusion. The use of hybrid reinforcement makes it possible to increase the bearing capacity of concrete beams, depending on the percentage of reinforcement in the section. The determining factors for the strength of beams with hybrid reinforcement are the strength of the concrete in the compressed zone and the percentage of section reinforcement. The optimal percentage of the ratio of metal and basalt reinforcement in concrete beams with hybrid reinforcement is 60 % / 40 %.Keywords:beams with hybrid reinforcement, basaltoplastic reinforcement, steel reinforcement, strength, deformability.