75504 2712-8172 Magazine of Civil Engineering 4 112 2022 1-173
RAR RUS 11201-11201 6504824408 0000-0001-6892-2763 Rudny Industrial Institute Miryuk Olga mirola_1107@mail.ru
Rudny, Kazakhstan
 Phase composition of belite cements of increased hydraulic activity The work is devoted to resource-saving technology development of belite cements. To solve the problem of slow hardening of belite cements, the influence of clinker phases on hydration and structure formation of binders has been studied. Composition and structure of substances were analyzed using X-ray, differential thermal methods and microscopy. Dependence of belite cements’ design strength with a saturation rate of SR = 0.73–0.80 on the content and properties of C3S alite was determined. Increase in C3S activating ability during formation of alite, based on natural silicates structures was revealed. It was found that the combination of C2S belite and calcium silicoaluminate C6A4MS in cement stimulates hydration and hardening processes. Intensive formation of stable hexagonal hydroaluminates and hydrogelenite provides a high rate of structure formation. Advantages of co-hydration of C2S with C3S and C6A4MS were realized in the mixed cement obtained from belite and aluminate clinkers. Studies of clinkers based on skarn-magnetite ore dressing waste indicate the preference of technogenic raw materials for improving belite cements technology. 10.34910/MCE.112.1 624.046 cements clinker belite alite aluminates’ phase binders hydration hardening https://engstroy.spbstu.ru/article/2022.112.1/
RAR RUS 11202-11202 0000-0001-9282-3255 Peter the Great St. Petersburg Polytechnic University Egorov Denis egorov.dv@edu.spbstu.ru
St. Petersburg, Russia
 6508223358 Riga Technical University Serdjuks Dmitrijs Dmitrijs.Serdjuks@rtu.lv
1 Kalku Street, Riga LV-1658, Latvia
 0000-0003-4851-4687 Peter the Great St. Petersburg Polytechnic University Grossman Anna grosswoman96@gmail.com
St. Petersburg, Russia
 0000-0001-5535-4701 Peter the Great St. Petersburg Polytechnic University Lysenko Dmitry dmitry_0798@mail.ru
St. Petersburg, Russia
 57194431559 0000-0003-4992-2084 Peter the Great Saint Petersburg Polytechnic University Galyamichev Alexander galyamichev@yandex.ru
Polytechnicheskay, 29
 57209803918 0000-0002-6056-5498 Peter the Great Saint Petersburg Polytechnic University Gerasimova Ekaterina katyageras17@gmail.com
St. Petersburg, Russia
 Bearing capacity of riveted connections of mineral wool sandwich panels The article presents a study on the pulling-out bearing capacity of the connection between a curtain wall system and an outer sheet of a wall sandwich panel with a mineral wool core realized through blind rivets. An experimental study was carried out on samples of sandwich panels with various parameters of fastening in order to assess the influence of the considered factors on the value of bearing capacity. Results obtained for the studied type of sandwich panel allowed us to determine the minimum permissible edge distance for a blind rivet in order to prevent delamination of the outer sheet as well as the influence of the end profile installation and cyclic load action on the bearing capacity of the joint. Experimental results showed that the edge distance of 75 mm or more does not affect the bearing capacity of the joint. The pulling-out bearing capacity of a blind rivet with a diameter of 4.8 mm was determined for both single and cyclic load actions. The presence of an additional stiffening element such as end face profile contributed to an increase of this value. Recommended scheme for the installation of the fastening elements was proposed based on dependencies obtained during the experimental investigation. 10.34910/MCE.112.2 691.88 bearing capacity sandwich structures facades dynamic loads pull-out strength connectors https://engstroy.spbstu.ru/article/2022.112.2/
RAR RUS 11203-11203 37085664400 National University of Water Environmental Engineering Zhitkovsky Vadim zhitk@ukr.net
Rivne, Ukraine
 7004452338 0000-0001-8759-6318 National University of Water Environmental Engineering Dvorkin Leonid dvorkin.leonid@gmail.com
Rivne, Ukraine
 0000-0003-0999-0402 National University of Water and Environmental Engineering Marchuk Vitalii v.v.marchuk@nuwm.edu.ua
Rivne city, Ukraine
 Fine-grained cement-ash concrete for 3D-printing An analysis of the main types of basic building mixtures for 3D printing and the requirements for their basic properties is presented. Using the mathematical planning of experiments, a complex of polynomial models of the properties of cement-ash fine-grained concrete mixtures for 3D printing was obtained. These properties included their “open time” extrusion suitability, the structural strength required for layering the mixture after a certain time after mixing, tensile strength during splitting characterizing the adhesion of layers and the compressive strength of extruded concrete. As mineral admixtures, the concrete included fly ash and the hardening accelerator: building gypsum. A laboratory printer was designed and used for the research. On the basis of the obtained models, an analysis of the factors of the composition of cement-ash concrete mixtures for the investigated properties is carried out. The article shows a solution to the optimization problem according to the criterion of the minimum cost of the composition of a fine-grained concrete mixture for 3D printing using computer software. 10.34910/MCE.112.3 691.322 3D-printing building mixtures polynomial models optimization cement-ash concrete compositions https://engstroy.spbstu.ru/article/2022.112.3/
RAR RUS 11204-11204 57207950600 0000-0003-3142-428X Mien Tay Construction University Lam Thanh Quang Kha lamthanhquangkhai@gmail.com
Vinh Long city, Vietnam
 57212383467 0000-0001-8101-4698 Mien Tay Construction University Ngo Van Thuc nvthuc34@gmail.com
Vinh Long, Vietnam
 Thuy Loi University Vu Quoc Vuong vuongvlxd@tlu.edu.vn
Hanoi, Vietnam
 University of Transport Technology Nguyen Anh Tuan tuanna@utt.edu.vn
Hanoi, Vietnam
 0000-0002-9613-6011 University of Transport Technology Nguyen Thi Thu Nga ngantt@utt.edu.vn
Hanoi, Vietnam
 Combination of additives to characteristics of concrete in marine works The deterioration of marine concrete structures due to corrosion damage is increasingly recognized as a serious worldwide challenge for researchers and managers in both technical and economic terms while also leading to other adverse factors. The cost of repairing corrupted and destroyed structures is enormous. The issue of how to improve durability in concrete has received considerable critical attention. There have been several reported longitudinal studies involving the durability of concrete. However, there has been little quantitative analysis of improving the durability of concrete in the seawater environment by incorporating additives. Thus, the aim of this study is to shine new light on using the Taguchi method, which is assisted by MINITAB 19 software to find out the appropriate mixing parameters between some main additives, including fly ash, silica fume, and additive reducing water changing with three levels. The effect of each parameter is evaluated based on the signal-to-noise (SN) ratio: compressive strength is analyzed according to the more significant criterion, while other indicators of durability such as absorption, permeability coefficient, and abrasion are less important. The study offers some important insights into the results of experiments showing the application of the Taguchi experimental method, which allows us to determine the reasonable percent of the additive components with the least number of tests. 10.34910/MCE.112.4 691.32 fly ash silica fume water-reducing admixture Taguchi method signal-to-noise ratio https://engstroy.spbstu.ru/article/2022.112.4/
RAR RUS 11205-11205 55516020800 Northeast Forestry University Zhao Qianqian 492954791@qq.com
Harbin Heilongjiang, China
 0000-0002-2024-3806 Northeast Forestry University Zhang Lina 53860470@qq.com
Harbin, Heilongjiang Province, China
 0000-0003-2427-1086 Northeast Forestry University He Dongpo hdp@nefu.edu.cn
Harbin, Heilongjiang Province, China
 Asphalt pavement rutting model in seasonal frozen area Effective prediction of rutting diseases in seasonal frozen area is helpful for comprehensive evaluation of asphalt pavement performance. In this paper, based on the Mechanical-Experienced Pavement Design Guide (MEPDG) theory, the rutting prediction model of asphalt pavement in the seasonal frozen area is established by using the measured rutting data of 9 typical highways in the seasonal frozen area of China. The research results show that the traffic volume, climate, and asphalt layer thickness of the pavement structure are directly proportional to the change in rutting. The proposed correction coefficients for the prediction model of asphalt pavement rutting in the seasonal frozen area are β1r = 2, β2r = 1.03 and β3r = 0.93. The normal distribution map and P-P map of the rutting prediction model conform to the normal distribution. The fit between the predicted data of the prediction model and the measured data is high. The fitting value between the predicted data and the measured data before correction is R2 = 0.9357. The fitting value between the revised predicted data and the measured data is R2 = 0.9925. The research results are of great significance for the prediction of rutting and maintenance of asphalt pavement in the seasonal frozen area. 10.34910/MCE.112.5 625 deterioration pavement maintenance design model https://engstroy.spbstu.ru/article/2022.112.5/
RAR RUS 11206-11206 6504446571 0000-0001-6981-7420 Jordan University of Science and Technology Al-Rousan Rajai rzalrousan@just.edu.jo
Irbid, Jordan
 The shear behavior of anchored groove RC beams The purpose of this research is to find an effectual technique to anchor reinforced concrete (RC) beams that are strengthened with fiber-reinforced polymers (FRP) composites. Eighteen reinforced-with-CFRP beams were designed. The specimens were split into three groups consisting of: 1) eight externally- reinforced-by-CFRP beams, with no anchoring grooves; 2) eight beams similar to the first group, but with anchoring grooves; 3) and control beams, which were left without anchoring. In order to explore their behavior, all of the beam specimens underwent a four-point bending, and were compared to the control beams. The study’s focus was on exploring the relationship between the specimens’ modes of failure and their displacements due to the applied loads. The obtained results showed that the anchoring technique had a great effectiveness; whereas, the specimens with CFRP and anchor encountered a failure in the form of a separation in the concrete cover, unlike the un-anchored ones, which failed due to premature de-bonding. The study showed that the anchoring grooves had changed the mode of failure to a safer one. The anchoring technique enhanced the capacity of carrying the load, and reduced, to different extents, the mid-span deflection. In addition, the study found that reinforcing the beams by CFRP composites had enhanced the shear capacity of the area of anchorage, leading to an enhancement in the systematic efficiency of anchoring. Overall, the study concluded that the performance of the specimens was highly improved by utilizing the CFRP composite combined with anchored grooves. For much improved RC structural designs, it is of utmost importance to further develop the anchored groove technique to prevent, rather than delay, unpredictable de-bonding of CFRP. 10.34910/MCE.112.6 69.04 reinforced concrete anchored shear strength fiber reinforced polymer experimental https://engstroy.spbstu.ru/article/2022.112.6/
RAR RUS 11207-11207 0000-0002-8116-0123 Yozgat Bozok University Kaya Mehmet mehmet.kaya@yobu.edu.tr
Yozgat, Turkey
 Mechanical properties of ceramic powder based geopolymer mortars In this study, the properties of geopolymer mortars produced by activating ceramic powder with Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3) were investigated. Activator mixture was prepared by mixing NaOH containing 11 %, 13 % and 15 % sodium in proportion to the binder weight and Na2SiO3 in different proportions. The silicate modulus of the activator mixtures were set at ratios ranging from 0 to 0.3. Geopolymer samples were prepared by mixing ceramic powder with activator, water and sand in a standard cement mixer. After fresh mortar mixtures were placed in the molds, they were cured at 105 °C for 24 hours. The samples were taken out of the molds after curing. They were kept at room temperature for up to 28 days. Then, the samples underwent unit weight test, apparent porosity, water absorption ratio, ultrasound pulse velocity, flexural and compressive strength tests. As a result of the tests, compressive strength between 10.42 MPa and 41.53 MPa, flexural strength between 2.34 MPa and 10.38 MPa were determined. Optimum mixing ratio and strength values were determined. 10.34910/MCE.112.7 691 mechanical properties mortar geopolymer ceramic powder binder optimization https://engstroy.spbstu.ru/article/2022.112.7/
RAR RUS 11208-11208 Northeast Forestry University He Yao 1436287817@qq.com
Xiangfang District, Harbin, China
 Northeast Forestry University Yang Lanjie yanglanjie@nefu.edu.cn
Xiangfang District, Harbin, China
 Northeast Forestry University Wu Hao 2111566167@qq.com
Xiangfang District, Harbin, China
 Northeast Forestry University Zhao Yagebai 270286835@qq.com
Xiangfang District, China
 36769668900 0000-0002-7620-614X Northeast Forestry University Wang Hongguang wanghongguang@zoho.com
Xiangfang District, Harbin, China
 Effect of Na+ on hydration degree of alkali activated metakaolin polymer In recent years, geopolymeric gel materials have become a hot research issue due to their good mechanical properties, durability and excellent chemical stability. In this paper, Na+-metakaolin soil polymer was prepared by activating metakaolin with a combination of NaOH and sodium silicate. Taking Na's influence on the hydration degree of alkali-activated metakaolin soil polymer as the goal, we selected Na2O equivalent and the modulus of the alkali activator, two most important factors for Na+ content in the system, as the object of our studies. The effect of Na2O equivalent and modulus on the degree of hydration of geopolymers was analyzed by testing the compressive strength of metakaolin land polymers and microscopic SEM, FT-IR and XRD. The results show that the optimal activation environment for metakaolin is 18 % Na2O equivalent and 1.5 modulus. When the Na2O equivalent is less than 18 %, as the Na2O equivalent increases, the degree of hydration of the metakaolin land polymer deepens. When it is greater than 18 %, with the Na2O equivalent, the first stage of the geopolymer hydration reaction is suppressed and the degree of kaolin hydration is partially weakened. When the modulus is less than 1.5, as the modulus increases, the rate of the first stage of geopolymerization is accelerated, and the degree of hydration is deepened. When the modulus is greater than 2.0, as the modulus increases, the geopolymerization hydration reaction is suppressed during the second and third stages, the formation rate of geopolymeric gel is slowed down and the degree of hydration is weakened. 10.34910/MCE.112.8 624 geopolymers chemical activation hydration materials testing scanning electron microscopy X-ray diffraction https://engstroy.spbstu.ru/article/2022.112.8/
RAR RUS 11209-11209 0000-0003-0564-9928 Azerbaijan SPU of Hydro technique and melioration Lipin Andrey dorian.lipin@gmail.com
Baku, Azerbaijan
 Telescopic water intake with stilling well Telescopic water intake structures have an important role in the water management system. Telescopic water intake has high mobility and wide field of application; at the same time, it is very simple and convenient to operate. But despite these advantages, there is no structural solution for flow energy dissipation in the downstream, no exact calculation method of flow energy dissipating structure, no structural solution to prevent floating objects entering inside the water intake structure, and no structural solution to stop water intake operation. In this regard, the purpose of this research is to improve the design of the existing telescopic water intake, to develop the design and calculation method for the stilling well. Structural solution for flow energy dissipation by means of stilling well is proposed. To protect the water intake from the ingress of floating objects and debris, protective mesh is designed. A shutter is provided to stop water intake operation of the unit. Methodology for analytical hydraulic calculation of a stilling well has been developed. In order to verify above mentioned calculation methodology, analytical calculations and numerical modeling of specific example were performed. The following results of analytical calculation of the main parameters of stilling well were obtained: length and depth. The results of numerical modeling demonstrated effective energy dissipation in the stilling well and acceptable flow velocity at the entrance to the channel. 10.34910/MCE.112.9 627.832 water structure calculation CFX finite element method improvement https://engstroy.spbstu.ru/article/2022.112.9/
RAR RUS 11210-11210 55987955900 0000-0001-8118-8866 Kalashnikov Izhevsk State Technical University Gordina Anastasiya afspirit@rambler.ru
Izhevsk, Russia
 7006888927 0000-0002-2754-3967 Kalashnikov Izhevsk State Technical University Yakovlev Grigorij gyakov@istu.ru
Izhevsk, Russia
 57209719656 0000-0001-9952-8363 Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences Averkiev Igor virgilio.007@yandex.ru
Izhevsk, Russia
 0000-0002-7109-0686 Kalashnikov Izhevsk State Technical University Shevchenko Filipp gism56@mail.ru
Izhevsk, Russia
 57204363802 0000-0002-2880-8103 Kalashnikov Izhevsk State Technical University Gumeniuk Aleksandr aleksandrgumenyuk2017@yandex.ru
Izhevsk, Russia
 55988414000 0000-0003-1331-9312 Kalashnikov Izhevsk State Technical University Polyanskikh Irina irina_maeva@mail.ru
Izhevsk, Russia
 Fluorоanhydrite based composites with the thermoplastic additive The article represents the results of using industrial sulfur as an additive to a fluoroanhydrite based binder and the estimation of its influence on mechanical and physicochemical properties. Waste generated by human activities on an industrial scale, such as industrial sulfur and fluoroanhydrite, pose a serious environmental problem in terms of storage and disposal. Moreover, industrial sulfur and fluoroanhydrite have particular properties to form composite material with required properties. A number of studies have been carried out on using industrial waste as components of building materials, performance properties of the products obtained being improved and the functional use of the products being expanded. In order to study changes in the mechanical properties and physicochemical composition of material based on synthetic fluoroanhydrite, conventional testing methods accompanied by modern methods including scanning electron microscopy and X-ray analysis and infrared spectroscopy, were used. According to the obtained results compressive strength of composition modified with 10 % of thermoplastic additives was 35.77 MPa, water resistance was 0.68. This increase in mechanical properties is due to an interaction between chemically reactive polymorphic types of sulfur which are formed by transformation of α- type to β- and fluoroanhydrite binder. The results of the presented study prove the possibility of creating a building material, the composition of which is fully represented by industrial waste and the characteristics of which are not inferior to its analogues in terms of technical and economic properties. 10.34910/MCE.112.10 691.335 compressive strength hydration energy utilization recycling binders sulfur compounds calcium compounds optimization environmental impact https://engstroy.spbstu.ru/article/2022.112.10/
RAR RUS 11211-11211 0000-0001-7505-2233 Hanoi University of Civil Engineering Nguyen Hoang Giang giangnh@huce.edu.vn
Hanoi city, Vietnam
 55853533500 0000-0002-4841-0653 Hanoi University of Civil Engineering Nguyen Ngoc Tan tannn@huce.edu.vn
Hanoi city, Vietnam
 0000-0002-3108-6463 Hanoi University of Civil Engineering Nguyen Trung Kien kiennt2@huce.edu.vn
Hanoi city, Vietnam
 Structural performance of corroded RC beams without shear reinforcement In this paper, a total of eight medium-scale RC beams with the dimensions of 150×200×1100 mm were fabricated without shear reinforcements. These beams were subjected to an accelerated corrosion test and then to a four-point loading shear test. The key test variables were various degrees of corrosion introduced in the tension reinforcements (0 %, 3.13 %, 4.11 %, and 4.93 % by mass loss). Even though all tested beams collapsed in shear failure, corroded beams exposed to 3 % and 4 % corrosion degrees showed a clear upward trend of approximately 7 % of maximum capacity compared to control beams. In contrast, corroded beams having a 5 % corrosion degree showed a 10 % decrease in shear strength with distinguished cracking patterns and load-carrying mechanism because of the significant loss of bond strength due to corrosion. Furthermore, a finite element model (FEM) for the prediction of structural performance in tested beams was produced using DIANA software. This model was verified by the experimental results (e.g. load-deflection curves, cracking patterns) with good agreement. Lastly, the parametric study of different shear span-to-depth ratios was also conducted to examine the FEM capability in simulating different behavior associated with beam and tie-arched mechanisms. 10.34910/MCE.112.11 624 reinforced concrete beams reinforcement corrosion shear strength modeling finite element method https://engstroy.spbstu.ru/article/2022.112.11/
RAR RUS 11212-11212 Institute of Techniques for Special Engineering, Le Quy Don Technical University Nguyen Van-Tu nguyentu@lqdtu.edu.vn
Ha Noi, Viet Nam
 0000-0002-2285-3034 Kumoh National Institute of Technology Mai Viet Chinh maivietchinh@lqdtu.edu.vn
Gumi, Gyeongbuk, South Korea
 Flexural behavior of 60 m UHPC pre-stressed box girder In recent years, an emerging technology of Ultra High Performance Concrete (UHPC) has become popular in the construction industry and has been applied in many countries around the world. However, this material technology is still relatively new in Vietnam. The present investigation is a study on enhancement in flexural performance and the effectiveness of UHPC box girder strengthened with pre-stressed tendons, which was adapted from the first project of a high-speed train in Vietnam. A 3D simulation model of a 60 m UHPC pre-stressed box girder was implemented using concrete damage plasticity (CDP) approach. The validity of the proposed model is ensured by comparing the simulation results with experimental data. The parametric studies were then performed using the validated finite element model to analyze the flexural behavior of the 60m UHPC pre-stressed box girder. It was concluded that the developed models can accurately capture the behavior and predicts the load-carrying capacity of the UHPC girder. The present research contributes to the development and application of advanced UHPC concrete technology in Vietnam as well as emphasizes effective designs that significantly reduce self-weight and enhance loading capacity for super long-span girders. 10.34910/MCE.112.12 621.5 concrete damage plasticity simulation model box girder four-point bending ultra high performance concrete https://engstroy.spbstu.ru/article/2022.112.12/
RAR RUS 11213-11213 Civil Defence Academy EMERCOM of Russia Budykina Tatyana tbudykina@yandex.ru 57200555635 Mendeleev Russian University of Chemistry and Technology Anosova Yevgenia evgenia.anosowa@yandex.ru
Moscow, Russia
 Thermal resistance of fire retardant materials The results of thermal resistance of fire-retardant materials "OGNEBASALT" PMBOR and OGNEZA-GT sealant in the form of a mineral wool heat-insulating plate are presented. To study the behavior of fire-retardant materials, the method of TG-DSC synchronous thermal analysis (thermogravimetry in conjunction with differential scanning calorimetry) was used on a NETZSCH thermal analyzer. The incombustible properties of "OGNEBASALT" PMBOR have been confirmed, which showed a decrease in the mass of the material by 21 % when heated to 1000 °C. The thermo-expanding sealant OGNEZA-GT reduced its weight at the same heating with the fire-basalt material by 64 %. For a 10 % weight loss, the two test specimens require different temperatures of 395 and 262 °C, respectively. Time interval of "OGNEBASALT" PMBOR weight loss from 99.6 % to 77.6 % – from 12 minutes to 27 minutes of the experiment; for OGNEZA-GT sealant, from 99.8 % to 54.7 % – from 8 minutes to 18 minutes of testing. The best thermo-resistant properties have been revealed for the fire-retardant material "OGNEBASALT" PMBOR, which makes it possible to recommend its widespread use as a material for passive fire protection. The research results can be used to justify the choice of fire protection in buildings of various functional classes of fire hazard. 10.34910/MCE.112.13 677.074, 677.027.62, 699.868 fire retardant materials fire retardant properties fire retardant composition building materials thermogravimetric analysis microstructure https://engstroy.spbstu.ru/article/2022.112.13/
RAR RUS 11214-11214 0000-0001-6224-9643 University of Science, Department of Chemistry Yong Su Hwang rijinge@126.com
Pyongyang, DPR Korea
 0000-0003-1237-3712 Kim Cheak University of Technology, Department of Mining Engineering Song Gun Kang lijinge@126.com
Pyongyang, DPR Korea
 0000-0003-1712-3907 University of Science, Department of Chemistry Ju Hyon Yu lijingefsatr@163.com
Pyongyang, DPR Korea
 0000-0001-5227-7544 University of Science, Department of Chemistry Jin Hyok Ri rijinge@163.com
Pyongyang, DPR Korea
 0000-0002-1340-0324 University of Science, Department of Chemistry Yong Ho Kim lijinge@163.com
Pyongyang, DPR Korea
 Cement grinding aid based on glycerol-waste antifreeze Grinding aids to increase grinding efficiency in cement production are materials that can produce large amounts of high-quality cement in a short time by reducing surface energy by preventing particle agglomeration and improving fluidity. In the paper, a grinding aid using glycerol-waste antifreeze (GAP) was prepared and its effect on the grinding properties of clinker was investigated in contrast to that without the grinding aid. The results are as follows: The angle of repose of the cement powder added with GAP decreased as the grinding time increased (decreases by 3.8 when the grinding time was 60 minutes), indicating that it increased the flowability of the powder. On the contrary, when GAP was added, the residual amount of 45 µm sieve was also significantly reduced (4.6 % decrease) and the specific surface area increased (30.5 m2/kg), which resulted in an increase in the grinding efficiency. The zeta potential of the cement powder is greatly reduced, which lowers the surface tension of the cement particles. In the size range of 3 to 32 µm, it increases the particle content, makes the particle size distribution uniform, the 7d and 28d activity index of the powder is improved by 5 % and 6 %, respectively, and increases the compressive strength of the cement. In addition, it was confirmed that the performance of the TEA grinding aid and the grinding aid were similar, and were very effective in terms of economy. 10.34910/MCE.112.14 691.54 Cement mortar grinding aid waste antifreeze clinker powder compressive strength https://engstroy.spbstu.ru/article/2022.112.14/
RAR RUS 11215-11215 56826013600 Peter the Great St. Petersburg Polytechnic University Gravit Marina marina.gravit@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 57197818952 0000-0002-9822-3637 Graz University of Technology Dmitriev Ivan i.i.dmitriev@yandex.ru
Graz, Austria
 Numerical modeling of basalt roll fire-protection for light steel thin-walled structures The authors investigate the fire-protective efficiency of a basalt roll material, which is used for light steel thin-walled structures. The values of fire-protective efficiency for the steel C-shaped profiles without fire protection made of basalt wool material MBOR-F were obtained in the experimental and numerical studies. This article presents the estimated dependence of the thickness of the fire-protective material MBOR F on the resistance to fire with regard to light steel thin-walled structures. The approximating functions are formed on the basis of the experimental data and presented as nomograms for heating of the steel structure. There was an absence of the samples’ deformation and destruction of the fire-protective material during the fire tests. This allows us to conclude that the fire-protective efficiency of the light steel thin-walled structures increases by 2–4 times. Implementation of the study results will expand the scope of fire-protective materials for the light steel thin-walled structures, improve the quality of fire protection projects for buildings and constructions, and help ensure the fire safety of structural elements. 10.34910/MCE.112.15 624.014 steel construction thin walled structures cold-formed steel structural design fire fire safety fire protection fire design https://engstroy.spbstu.ru/article/2022.112.15/