75504 2712-8172 Magazine of Civil Engineering 7 115 2022 1-160
RAR RUS 11501-11501 Perm National Research Polytechnic University; Perm State Agro-Technological University named after academician D.N. Prianishnikov Tretiakova Olga olga_wsw@mail.ru
Perm, Russia
 Model of pile-frozen soil interaction in a closed form The object of the research is pile-soil interaction under freezing and frost heaving. Modeling of pile-soil interaction on the basis of joint solution of static equilibrium equations, physical equations for stresses and equation of thermal conductivity is considered. No such solutions have been found in existing publications. In this study, a model of pile-soil interaction in the form of a closed analytical solution with respect to the pile geometry was developed. Methods of continuum mechanics and elasticity theory were used. The model was a mathematical record of the equilibrium of forces acting on the pile. It was reduced to second-order algebraic equations with respect to its geometric parameters. The static equations of force equilibrium written in quadratic form related the geometric parameters of the pile to the stress-strain state and the thermal characteristics of the soil. Physical equations for heaving stresses and the thermal conductivity equation closed the problem. The model was developed as applied to a pile with an upper reverse taper. It reflected the performance of the pile during freezing and frost heaving and allowed determining its required geometric parameters under the given soil and climatic conditions. 10.34910/MCE.115.1 624.154:624.139.32:519.87 model soil frost heaving pile geometry thermal conductivity stress-strain state static equilibrium equation https://engstroy.spbstu.ru/article/2022.115.1/
RAR RUS 11502-11502 57197922061 0000-0002-4487-4530 Synergy Institute of Engineering and Technology Dash Subhakanta subhakantadash9@gmail.com
Dhenkanal, Odisha, India
 0000-0002-4678-0650 KIIT Deemed to be University Panda Laxmidhar ld.laxmi@gmail.com
Bhubaneswar, Odisha, India
 0000-0001-9610-0601 Synergy Institute of Engineering and Technology Mohanty Itishree imohanty09@gmail.com
Dhenkanal, Odisha, India
 0000-0002-7612-6916 SRM Institute of Science and Technology Gupta Piyush piyushg.1977@gmail.com
Delhi-NCR Campus, Modinagar, Ghaziabad, UP, India
 Comparative feasibility analysis of fly ash bricks, clay bricks and fly ash incorporated clay bricks Recycling of industrial wastes like fly ash into construction materials is attaining more momentum nowadays towards enhancing the characteristics and performance of materials in terms of strength and durability. This article attempts to present the effect of fly ash inclusion on the properties of bricks through a comparative feasibility analysis of fly ash bricks (FB), clay bricks (CB), and fly ash incorporated clay bricks (FC). For experimentation, twelve brick specimens were made using fly ash, clay, lime, gypsum, sand, and water in different proportions followed by sun-drying and firing methods. Sieve analysis, X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy Dispersive X-ray Fluorescence (EDXRF), Fourier-transform infrared spectroscopy (FTIR), compressive strength, and efflorescence tests were performed to study the properties of brick specimens. Various factors such as the effect of drying, heating temperature, and percentage of ash addition on the bricks were also observed. The laboratory results indicated that out of the above-mentioned three bricks, FB showed better performance than CB and FC. The compressive strength and water absorption values for FB were found in the range of 8.50–12.18 MPa and 10.84–13.11 %, respectively. Thus, based on the experimental observations and results, the mix design FB-3 (25 % fly ash, 20 % lime, 2 % gypsum, 53 % sand) exhibited the optimum compressive strength of 10.25 MPa with a water absorption value of 11.16 %. This mix design can be recommended as a substitute for conventional bricks against aggressive environment contributing immensely towards solid waste management and sustainable development. 10.34910/MCE.115.2 691.31 fly ash fly ash bricks clay bricks fly ash incorporated clay bricks compressive strength water absorption https://engstroy.spbstu.ru/article/2022.115.2/
RAR RUS 11503-11503 0000-0001-5714-1259 Ho Chi Minh City University of Technology – Vietnam National University Do Quang Minh mnh_doquang@hcmut.edu.vn
Ho Chi Minh City, Vietnam
 0000-0002-7256-4097 Ho Chi Minh City University of Technology – Vietnam National University Nguyen Huynh Uyen Phuong phuongup@gmail.com
Ho Chi Minh City, Vietnam
 0000-0003-0922-9891 Vietnam Institute for Building Materials Le Van Quang quanghuce83@gmail.com
Hanoi, Vietnam
 0000-0001-8413-8741 Vietnam Institute for Building Science and Technology Hoang Minh Duc hmduc@yahoo.com
Hanoi, Vietnam
 Water treatment residue and coal fly ash geopolymers Water treatment residue (WTR) from water purification is a non-hazardous solid waste commonly discharged in landfills. WTR contains aluminosilicates and can participate in geopolymerization. Due to the low alkaline activity of WTR, we used coal fly ash with the WTR to coal fly ash ratio from 80 wt% to 50 wt% and activated it with the 8M NaOH solution. The specimens were cured in normal conditions for 28 days at room temperature, and in an autoclave for 7 days under a pressure of 2 MPa and temperature of 215 ºC. The test results showed that the compressive strength of geopolymers cured in an autoclave reached 28.8 MPa, which is much higher than for those cured in normal conditions with only 13.2 MPa. The microstructure (XRD, SEM) and chemical bonding (FTIR) analyses confirmed the analcime crystal formation in the geopolymers. 10.34910/MCE.115.3 691.335 water treatment residue coal fly ash analcime geopolymer autoclave curing https://engstroy.spbstu.ru/article/2022.115.3/
RAR RUS 11504-11504 S-1676-2017 6507460407 0000-0002-8907-7869 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Mirsaidov Mirziyod theormir@mail.ru
39, Kori Niyoziy St., Tashkent, Uzbekistan, 100000
 57221229245 0000-0002-8853-8774 Samarkand State Institute of Architecture and Civil Engineering Mamasoliev Kazokboy q-mamasoliev@mail.ru
Lolazor Samarkand, Uzbekistan
 Contact interaction of multilayer slabs with an inhomogeneous base The article is devoted to the development of mathematical models and new methods for solving contact problems of multilayer elements of structures with an inhomogeneous base, considering their mechanical, structural features, and to the assessment of their internal force factors. A mathematical model was developed and an analytical method was proposed for assessing the internal force factors in multilayer strip slabs on an inhomogeneous base under various loads. The solution of the problems under consideration is based on a series expansion of the reactive pressure of an inhomogeneous base in terms of orthogonal ultra-spherical Gegenbauer polynomials; the solution is reduced to the study of infinite systems of algebraic equations. Their regularity was proved and the corresponding estimates were obtained. The required number of terms of the polynomial in the expansion was established. The analysis of the results obtained made it possible to evaluate the influence of the rigidity characteristics of the filler and the inhomogeneity of the base on the distribution of internal force factors in the slabs. 10.34910/MCE.115.4 539.3 contact problem multilayer strip-slab inhomogeneous base ultra-spherical Gegenbauer polynomials integro-differential equations infinite system regularity https://engstroy.spbstu.ru/article/2022.115.4/
RAR RUS 11505-11505 57208867799 0000-0002-5094-9420 Sultan Ageng Tirtayasa University Bethary Rindu Twidi rindutwidibethary@gmail.com
province Banten, Indonesia
 57170698500 Bandung Institute of Technology Subagio Bambang Sugeng bssubagio@yahoo.com
Bandung, Indonesia
 Resilient modulus model of asphalt mixture using steel slag The use of waste materials from road scrapping, called reclaimed asphalt pavement (RAP) and steel slag aggregates becomes more and more popular in road maintenance and road reconstruction. Those materials can replace and reduce the amount of virgin materials needed in the mixing process. In this research, the optimum bitumen content (OBC) of Marshall specimens has to be determined firstly, before the samples for resilient modulus test were prepared. The UMATTA equipment was used to determine the resilient modulus of each sample, which consist of: original mixture i.e., without slag and RAP materials, and the mixture with RAP and slag. The results showed that the mixture with RAP and slag materials has the higher resilient modulus, compared to the original mixture, and the most impactful parameters for the results are bitumen modulus, percentage of RAP materials, slag materials and void in mixture. 10.34910/MCE.115.5 691.168 bitumen modulus resilient modulus reclaimed asphalt pavement slag materials https://engstroy.spbstu.ru/article/2022.115.5/
RAR RUS 11506-11506 6506150284 0000-0003-1139-3164 Moscow State University of Civil Engineering (National Research University) Sainov Mikhail mp_sainov@mail.ru
Moscow, Russia
 Stress-strain state of CFRD with a decrease in friction at the face-sidewall contact Friction forces arise at the contact between a concrete face and a rockfill dam body at deformations caused by hydrostatic pressure. They cause tensile and compressive longitudinal forces in the face which decrease the safety factor. In modern CFRD, a layer of emulsified asphalt is placed at the contact between the face and the sidewall made of low cement concrete to decrease the friction. Tests carried out in China permit determining shear characteristics of such a contact. They revealed the effect of increasing tangential stiffness with growth of compressive pressure. At high pressures the contact stiffness may reach 200÷500 MPa/m. The author refined the relationship describing the effect of increasing tangential stiffness and determined its parameters. Availability of the data on tangential stiffness and strength of the contact permitted the author to make a more precise model of the concrete face stress-strain state by the finite element method. The results of analyses showed that measures on decreasing the contact friction do not reach the required effect: considerable tensile longitudinal forces appear in the face. The contact tangential stiffness should be more decreased. Tentatively it may be recommended that in a 100m high dam to provide the face tensile strength the contact tangential stiffness should not exceed 50 MPa/m. However, for more justified conclusion it is necessary to carry out additional experimental studies of shear characteristics of the contact between face and the sidewall; and they should be conducted for conditions of very low shear rates typical for real dams. 10.34910/MCE.115.6 626/627 dams curbs shear stress friction finite element method interfaces (materials) strain concrete faced rockfill dam (CFRD) https://engstroy.spbstu.ru/article/2022.115.6/
RAR RUS 11507-11507 26031561100 0000-0003-0085-9934 Eurasian National University of L.N.Gumilyov Lukpanov Rauan Rauan_82@mail.ru
Nur-Sultan, Kazakhstan
 0000-0001-6118-5238 Eurasian National University named after L.N. Gumilyov Dyussembinov Duman dusembinov@mail.ru
Nur-Sultan, Kazakhstan
 57204727444 0000-0002-7061-699X Eurasian National University named after L.N. Gumilyov Tsygulyov Denis denis_riza_72@mail.ru
Nur-Sultan, Kazakhstan
 57193734744 0000-0002-5984-9346 Eurasian National University named after L.N. Gumilyov Yenkebayev Serik yenkebayev-serik@mail.ru
Nur-Sultan, Kazakhstan
 Complex modified additive for concrete based on industrial waste The article presents the results of studies of concretes with the use of additives developed based on industrial waste: ash, post-alcoholic bard, and soapstock. The aim of the research was to improve the physical and mechanical characteristics of concrete without increasing its cost. The research was carried out for samples of different ash concentrations and the corresponding percentage of the additive. The material quality was assessed by comparing the results of laboratory tests of the binder and concrete: strength, bending strength, setting time (for the binder); cube strength, water absorption, frost resistance (for concrete). The test results showed the effectiveness of the additive, which can compensate for the losses of physical and mechanical characteristics due to the inclusion of ash into the concrete (to reduce costs). The optimum concentration of the additive is 0.004% by weight of cement, with a cement ash replacement rate of 5%. At these proportions, the investigated parameters, albeit insignificantly, exceed the samples of the traditional composition of concrete without additive, and at a lower concentration of ash, they exceed them to a large extent. The obtained results of the study are of practical value, can be used in construction without reference to the region, as the applied wastes belong to the standard industrial sectors. 10.34910/MCE.115.7 691.322 concretes binders ash compressive strength water absorption frost resistance setting times https://engstroy.spbstu.ru/article/2022.115.7/
RAR RUS 11508-11508 57191530761 0000-0002-4765-5819 Moscow State University of Civil Engineering (National Research University) Alekseytsev Anatoly aalexw@mail.ru
Moscow, Russia
 Bryansk State University of Engineering and Technology Kurchenko Natalia inserpik@gmail.com Topology design of plane bar systems based on polygonal discretization A topology formation method for frame and truss structures, which is relevant for use in computer-aided design, is proposed. A flat figure discretized into polygonal primitives is used as a basic structure. This structure is presented in the form of a finite element model and is assumed redundant. Its elements are excluded using the principle of maximizing the intensity of the force flow during the initial calculation and the shortest path of this force flow between the points that reflect force and kinematic connections. At the same time, the heuristic principle implemented in the ACO algorithms was used. Registration of geometrically variable systems is performed based on an estimate of the infinite norm of the stiffness matrix of the finite element model. For flat trusses and frames, examples of the formation of rational topologies under given force and kinematic constraints are considered. Comparison with the method of redundant structure, which implements the exclusion based on the genetic algorithm, is performed. It has been shown that the proposed technique allows one to effectively select both one and several alternative variants of the topology of bearing systems. 10.34910/MCE.115.8 69.04 topology design optimization truss frames finite element analysis stiffness geometrically stability https://engstroy.spbstu.ru/article/2022.115.8/
RAR RUS 11509-11509 Moscow State Civil Engineering University (National Research University) Obukhova (Shekhovtsova) Svetlana SHehovtsovaSYU@mgsu.ru
Moscow, Russia
 37099331400 0000-0003-0815-4621 Moscow State University of Civil Engineering (National Research University) Korolev Evgeniy korolev@nocnt.ru
Moscow, Russia
 Orel State University Novikov Alexander novikovan@ostu.ru
Orel, Russia
 V.G. Shukhov Belgorod State Technological University Shevtsova Anastasia shevcova-anastasiya@mail.ru
Belgorod, Russia
 Workability of warm mix asphalt additives and mechanical property characterization of asphalt concrete Warm mix asphalt (WMA) technology offers a promising solution to address the ecological concern of asphalt mixtures. Warm asphalt (WA), is expected to be a sustainable paving technology that integrates energy conservation, noise reduction, and performance optimization. This study aims to characterize and compare the engineering properties of WA mixture prepared with various WMA additives. To achieve this goal, WA mixtures were prepared with seven different WMA additives, including Adgezol 3-TD, DAD-TA2, Azol 1007, Cecabase RT 945, DAD-TA, Doros-T and Amdor TS-1. Comprehensive laboratory tests were conducted to characterize their workability and engineering properties, including penetration, fragility and softening temperature of bitumen, and dynamic viscosity. According to the experimental results, WMA additives including Adgezol 3-TD, DAD-TA2, Doros-T and Azol 1007 provided a 30% reduction in dynamic viscosity of modified bitumen; however, with such WMA additives as DAD-TA, Cecabase RT 945 and Amdor TS-1 no reduction in dynamic viscosity of modified bitumen was observed. Coefficients that consider the complex of physical, mechanical, technological and economic properties, as well as a generalized criterion (Fk) for the technical and economic efficiency of chemical additives were developed. It was proposed to divide warm mix additives into two groups: additives that improve the efficiency of bitumen by 5% (Fk≥1.05) or more, as well as additives that do not improve the efficiency of bitumen by more than 5% (Fk≤1.05), that is, have no significant effect on the properties. Comprehensive laboratory tests were conducted to characterize their workability and mechanical properties, including moisture susceptibility. According to the experimental results, only with Cecabase RT 945 and DAD-TA one can achieve compliance with regulatory requirements for hot asphalt concrete. The influence of warm mix additives on the structure of bitumen was studied. Using the Arrhenius equation, the change in the activation energy required to overcome the potential (kinetic) barrier of the bitumen with the surfactants had been calculated. The workability of warm mix additives was investigated, on the basis of which their classification was proposed. 10.34910/MCE.115.9 625.75 warm mix additives mechanical properties rheology activation energy workability https://engstroy.spbstu.ru/article/2022.115.9/
RAR RUS 11510-11510 Peter the Great Saint Petersburg Polytechnic University Rassokhin Aleksandr rassokhinaleksandr@gmail.com
Polytechnicheskay, 29
 Ponomarev Andrey 9293522@gmail.com 57060572700 0000-0002-9923-176X Peoples' Friendship University of Russia Shambina Svetlana shambina_sl@mail.ru
Moscow, Russia
 57189716281 0000-0003-3287-3298 Moscow State University of Civil Engineering Karlina Antonina karlinat@mail.ru
Moscow, Russia
 High performance lightweight concretes for 3D printing The paper is devoted to developing high-performance nanostructured concrete for 3D printing and studying its strength and operational characteristics. The research addresses issues related to the use of modern concrete chemistry, such as plasticisers and concrete hardening accelerators, and nanomodification by two types of nanocarbon: nanotores (Astralene) and sulphur graphene (Ugleron). The designed lightweight concrete for 3D printing has a compressive strength of about 70 MPa and 9 MPa after extrusion at a density of about 1.55–1.6 kg/m³. Pozzolan additives from industrial waste in concrete are used, such as silica fume and oil shale ash. Microspheres, which are also industrial wastes, are used as lightweight aggregate and thixotropy regulators. As a result, lightweight, high-performance concrete for 3D printing was developed, which allows the disposal of industrial waste inside it. 10.34910/MCE.115.10 691.3 high-performance concrete 3D printing compressive strength fine-grained concrete basalt fiber silica fume https://engstroy.spbstu.ru/article/2022.115.10/
RAR RUS 11511-11511 0000-0002-4707-9946 Yokohama National University Uwazuruonye Raphael uwazuruonyeraphael@yahoo.com
Hodogaya-ku, Yokohama, Japan
 Durable concrete in sewerage using non-grinded rice husk ash and water-permeable mould There are increasing interests in using natural pozzolans as partial replacements for ordinary Portland cement (OPC) in concrete due to the benefit to the environment, low-carbon footprint, and durability improvement potentials. In the present research, open-air-burnt non-grinded rice husk ash (RHA) samples from Ganawuri-Plateau State, Nigeria, were used as a partial replacement for OPC in concrete. A water-permeable form (controlled permeability formwork – CPF) was utilized to counter the adverse effects of high-water demand. The combined effects of CPF and RHA on the cover-zone microstructure/porosity were analysed by the mercury intrusion porosimetry (MIP) test. Water sorptivity and sulphuric acid resistance properties were measured by Surface Water Absorption Test (SWAT) and accelerated sulphuric acid resistance test, respectively, to study the suitability of the concrete mixtures for sewerage concrete structures. Compared to Portland cement concrete, the RHA with CPF samples had relatively low permeability and low water sorptivity while the RHA without CPF samples showed the highest resistance to sulphuric acid attack, exhibiting no weight loss, no gypsum formation at the surface with the least surface discolouration. 10.34910/MCE.115.11 624.01 concrete supplementary cementitious material microstructure water absorption acid resistance sustainability durability https://engstroy.spbstu.ru/article/2022.115.11/
RAR RUS 11512-11512 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
 0000-0002-1397-9305 Northeast Forestry University Xu Wenyuan xuwenyuan@nefu.edu.cn
Harbin, Heilongjiang, China
 55516020800 Northeast Forestry University Zhao Qianqian 492954791@qq.com
Harbin Heilongjiang, China
 0000-0002-2258-3708 Heilongjiang Transportation Investment Group Co. Teng Shubin tengshubin112233@163.com
Harbin City, Heilongjiang Province, China
 Compressive strength prediction model of lightweight high-strength concrete A reasonable prediction of the compressive strength of lightweight high-strength concrete is an important basis for determining concrete strength. Through cluster analysis, the key factors affecting the compressive strength of lightweight high-strength concrete are found, and the degree of influence of each factor on the compressive strength is analyzed. We applied linear regression analysis of the relationship between the above factors and the compressive strength using SPSS, and performed multiple non-linear regression to establish a prediction model for the compressive strength of lightweight high-strength concrete using MATLAB. Using RMSE, we tested the simulated and actual values of the model, to determine the applicable conditions of the model through response surface analysis. The results of the study show that: cylinder compressive strength, water-binder ratio, cement dosage, coarse aggregate particle size and sand ratio are the key factors affecting the compressive strength. The R2 values of the single-factor prediction models are all greater than 0.9, and the corresponding coefficients of the lightweight high-strength concrete compressive strength prediction models are 1.46, 18.31, 21.6, –3.28, –71.12, 1.36 and 20.48 respectively; The root mean square error RMSE is all lower than 1.05 MPa. The applicable condition of the prediction model shows that the cylinder compression strength is between 3.2 MPa and 4.9 MPa. When the coarse aggregate particle size is 15 mm~25 mm, the sand ratio is 26 %~35 %, the cement dosage is 450 Kg/m³~500 Kg/m³, and the water-binder ratio is 0.34~0.4, the parameter value range is the optimal prediction space of the model. When the 5 parameters are simultaneously in the optimal prediction interval, the prediction level of the model is the best and the prediction accuracy of the proposed compressive strength prediction model is higher. The model is of great significance to the study of the mechanical properties of lightweight high-strength concrete. 10.34910/MCE.115.12 625 concrete numerical model regression analysis optimization mechanical performance https://engstroy.spbstu.ru/article/2022.115.12/
RAR RUS 11513-11513 26031561100 0000-0003-0085-9934 Eurasian National University of L.N.Gumilyov Lukpanov Rauan Rauan_82@mail.ru
Nur-Sultan, Kazakhstan
 0000-0001-6118-5238 Eurasian National University named after L.N. Gumilyov Dyussembinov Duman dusembinov@mail.ru
Nur-Sultan, Kazakhstan
 55378440800 0000-0003-1680-5287 Eurasian National University named after L.N. Gumilyov Shakhmov Zhanbolat zhanbolat8624@mail.ru
Nur-Sultan, Kazakhstan
 55339733600 0000-0001-8547-5440 Eurasian National University named after L.N. Gumilyov Bazarbayev Daniyar phdd84@mail.ru
Nur-Sultan, Kazakhstan
 57204727444 0000-0002-7061-699X Eurasian National University named after L.N. Gumilyov Tsygulyov Denis denis_riza_72@mail.ru
Nur-Sultan, Kazakhstan
 57193734744 0000-0002-5984-9346 Eurasian National University named after L.N. Gumilyov Yenkebayev Serik yenkebayev-serik@mail.ru
Nur-Sultan, Kazakhstan
 Influence of the technological foam concrete manufacturing process on its pore structure A two-stage foaming method of foam concrete production is proposed. The technical result of this method is aimed at improving the pore structure of the material. To assess the impact of the proposed production technology on the quality of the material, the construction properties of materials obtained by the classical method and the method of dry mineralization of foam were compared. The main assessment criterion of the quality of materials is the degree of homogeneity of foam concrete throughout the volume. Assessment of material porosity was carried out by analyzing the structure of dried specimens after soaking in water with and without colorant, as well as by pressing cylindrical specimens, segmented by height, while the assessment of material homogeneity was carried out through the analysis of discrete, particular measurements of the strength properties of the material at its height. The results of the porosity assessment gave a clear regularity of pore structure distribution of the materials of the methods compared. In general, the results of the comparison of water absorption and strength gave us an idea of the impact of technological production on the quality of foam concrete as a building product. The result of the research is the technology of foam concrete production by two-stage injection of foam: it is aimed at improving the pore structure of the material due to the uniform distribution of pores, as well as increasing the strength characteristics of the material by reducing the water-cement ratio and uniformly distributed structure of the supporting skeleton. 10.34910/MCE.115.13 692.23 permeability pore-related properties temperature-related effect thermal effect testing apparatus method https://engstroy.spbstu.ru/article/2022.115.13/
RAR RUS 11514-11514 National Research Moscow State Civil Engineering University Lam Tang lamvantang@gmail.com
Moscow, Russia
 National Research Moscow State Civil Engineering University Vu Kim Dien kimdienxdtb@gmail.com Influence of NaOH-concentration and blast-furnace-slag on the properties of geopolymer mortars The paper focused of the production of geopolymer materials using solid wastes, including fly ash, bottom ash (BA), granulated blast furnace slag (GBFS) in thermal power plants, and granulated blast furnace slag. Using the BA and GBFS as source material for geopolymer mortar is cost-effective, it allows safe disposal of the postproduction industrial wastes and improves properties of mortar for green buildings approach and development. In the present investigation, BA and GBFS were used as alumino-silicate materials for making alkali-activated bottom ash mortar (GPM). The effects of NaOH content in the sodium hydroxide solution with the concentration of 10–16 M and the presence of granulated blast furnace slag content (0–60 %) on the workability and the compressive strength development of alkali-activated bottom ash mortar were studied. The absolute volume method combined with the experimental results was used to determine the compositions of GPM specimens. Furthermore, the compressive strength of the mortar samples was performed following ASTM C109 and Vietnamese Standard TCVN 6016:2011. The results revealed that both NaOH concentration and granulated blast furnace slag content greatly affected the workability of mixtures and compressive strength development of the tested samples. Moreover, the relationship between the 28-day compressive strength and a water-to-geopolymer solid ratio of GPM specimens is also determined in this work. 10.34910/MCE.115.14 666.97 NaOH-concentration granulated blast workability compressive strength geopolymer mortars https://engstroy.spbstu.ru/article/2022.115.14/