75504 2712-8172 Magazine of Civil Engineering 1 109 2022 1-204
RAR RUS 10901-10901 0000-0003-1432-8595 KTH Royal Institute of Technology Shabani Amir amirsh@kth.se
Stockholm, Sweden
 0000-0003-4421-3721 University of Guilan Hamedi Gholam Hossein hamedi@guilan.ac.ir
Rasht, Guilan Province, Iran
 Effect of elastomer polymer on the moisture susceptibility of asphalt concrete There are various experimental methods for improving the moisture strength of asphalt concrete, such that the most common one being the use of anti-stripping materials. In the present paper, the influences of polymer materials on\ asphalt binder were investigated using repetitive loading test in wet and dry conditions along with thermodynamic parameters based on the surface free energy (SFE) components of asphalt binder and aggregates. The obtained results of this investigation indicate that using styrene butadiene rubber (SBR) polymer has improved the asphalt concrete strength against the moisture damage, especially in the specimens made of granite aggregates. Also, SBR polymer increases the cohesion free energy and reduces the energy released by the system during the stripping event, which represents a decrease in the tendency for stripping. The stripping percentage index, which is obtained by combining the results of the repetitive loading test in wet and dry conditions along with the results of thermodynamic parameters, represents that the specimens made of controlled asphalt binder in the loading cycles under wet conditions have a higher stripping rate. Also, the modulus loss rate in control asphalt concrete is faster than the modified specimens. 10.34910/MCE.109.1 experimental investigations strength moisture cyclic loads asphalt mixtures asphalt pavements polymers https://engstroy.spbstu.ru/article/2022.109.1/
RAR RUS 10902-10902 57196437054 0000-0002-5392-9150 National Research Moscow State Civil Engineering University Fedorova Nataliya fenavit@mail.ru
Moscow, Russia
 57215934802 0000-0001-5755-8345 Southwest State University Vu Ngoc Tuyen ngoctuyennd91@gmail.com
Kursk, Russia
 Deformation criteria for reinforced concrete frames under accidental actions A review of scientific research on survivability and protection of buildings from progressive collapse showed that despite the researchers’ increasing interest in the problem, many tasks in this area are waiting to be solved. The subject of the study in this work was the study of the parameters of the capacity curves of cross-sections of reinforced concrete elements of constructive systems of building frames under their static-dynamic loading conditions. This paper presents a methodology for determining the parameters of "load-deflection" curves and the deformation criterion for accidental limit state of a reinforced concrete element of statically indeterminate frame-rod constructive systems under an accidental action caused by removing one of the load-bearing elements from the constructive system. Two stages of loading such systems are considered: static loading to a specified design level and additional dynamic loading caused by a sudden structural rearrangement of the constructive system from the mentioned action. At the first stage of loading, the relative parametric load of cracking in an arbitrary cross-section of the reinforced concrete element of the constructive system and the sequence of formation of plastic hinges in this element is determined using an extraordinary version of the mixed method of structural mechanics of rod systems. At the second stage, the limit value of the relative parametric load is determined on an energy basis without using the structural dynamics apparatus. An algorithm for calculating parameters of the capacity curve of cross-sections of reinforced concrete elements of constructive systems under the considered actions and calculation results of the "relative parametric load-deflection" curve for the most stressed cross-section of the reinforced concrete frame when a middle column is removed from it are presented. The calculated values of the deforming cross-section parameters are compared with experimental data. It is shown that the use of parametric load in the proposed calculated dependencies for analyzing the sequence of formation of plastic hinges in the constructive system is in satisfactory agreement with the test results of such constructive systems under the considered loading regimes. 10.34910/MCE.109.2 reinforced concrete capacity curve column removal scenario alternate load path progressive collapse https://engstroy.spbstu.ru/article/2022.109.2/
RAR RUS 10903-10903 0000-0002-4873-2812 Universitas Gadjah Mada Prastica Rian Mantasa Salve rian.mantasa.s.p@ugm.ac.id
Yogyakarta, Indonesia
 55834660200 Universitas Indonesia Soeryantono Herr herr.soeryantono@ui.ac.id
Kota Depok, Indonesia
 56866241700 0000-0003-4992-8144 Universitas Indonesia Marthanty Dwinanti Rika dwinanti@gmail.com
Kota Depok, Indonesia
 Mathematical modelling of hydraulics and water quality characteristics for small dam maintenance Along the inclining events of flooding events, maintenance towards water infrastructure such as urban small dam is needed. The maintenance needs interdisciplinary approach involving hydrology, hydraulics, water quality, and sediment factors. Due to lack of studies in those fields, the study aims to construct a model by using RESOURCE MODELLING ASSOCIATES program to study behaviours of hydraulics and water quality as small dam management. Numerical modelling, hydrology analysis, hydraulics assessment, water quality tests, and field works are employed in this study, with Agathis small dam as a case. The model could run successfully which the result concludes that the model produces reasonable result with acceptable errors and value of R2. A scenario of constructed wetland is proposed and has good accuracy for future maintenance for hydrology, hydraulics, and environmental management. In addition, the models also could be applied to other problem such as an agricultural field also. In the near future, studies about hydrodynamics and water quality modelling especially sediment on small dams need to be more explored because few studies still have limited information meanwhile they have essential impact towards urban water management. 10.34910/MCE.109.3 small dam maintenance hydrodynamics analysis model validation numerical modelling https://engstroy.spbstu.ru/article/2022.109.3/
RAR RUS 10904-10904 University Of Anbar Kuhair Huda Hudakuhair@yahoo.com
Ramadi, Anbar, Iraq
 57194427458 0000-0001-7265-583X Department of Civil Engineering, College of Engineering, University of Anbar Hama Sheelan drsheelan@yahoo.com
Ramadi, Iraq
 56188851800 0000-0003-3377-2907 Department of Civil Engineering, College of Engineering, University of Anbar Aziz Khalil k_ibraheem@yahoo.com
Ramadi, Iraq
 Long–term behavior of composite steel plate-concrete slabs incorporating waste plastic fibers This research has been conducted to investigate the effect of adding waste plastic fibers (WPF) in concrete on behavior of composites steel plate-concrete slabs. The WPF were produced by cutting plastic bottles used to preserve carbonated beverages. Both mid-span deflection and slip between concrete layer and steel plate are measured using an electronic gauge at 7, 28, 56, 90, 120, 180 and 270 day age. Percentages calculations of plastic fiber by volumetric rates ranging between (0 %) to (1 %) were carried out. Reference concrete slab without plastic fibers was cast for comparison. Short-term test was conducted on the slabs to determine the ultimate load. The tests results showed that 1 % WPF has led to lower value of deflection and highest slip between steel plate and slab concrete. There is a slight difference between the results of 0.75 % and 1 %WPF. 10.34910/MCE.109.4 composite structure load-deflection behavior load-slip relation long-term plastic waste https://engstroy.spbstu.ru/article/2022.109.4/
RAR RUS 10905-10905 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 CFRP Strengthened RC beams The primary objective of this paper is to study the effectiveness of anchorage on the performance of shear deficient beams externally strengthened with carbon fiber-reinforced polymers (CFRP) composites. The overall behavior of the tested beams loaded up to failure, the onset of the cracking, and crack development with increased load and ductility were described. The use of CFRP composites is an effective technique to enhance the shear capacity of reinforced concrete (RC) beams. The externally bonded CFRP can increase the shear capacity of the beam significantly making it 15–34 % more than that of the control beams, depending on the variables investigated. The use of CFRP composites is an effective technique to enhance the shear capacity of RC beams by using CFRP strips anchored into the tension side and from the top. Bonded anchorage of CFRP strips with width of 0.1h, 0.2h, and 0.3h to the beam resulted in a decrease in average interface bond stress and an increase in the effective strain of the FRP sheet at failure. This resulted in a higher shear capacity as compared with that of the U-wrapped beams without anchorage as well as helped delay or mitigate the sheet debonding from the concrete surface. Finally, an inclusive assessment of the NLFEA results is conducted using a large test database of well-known shear strength models. 10.34910/MCE.109.5 reinforced concrete anchored shear flexural strength fiber reinforced polymer nonlinear finite element analysis https://engstroy.spbstu.ru/article/2022.109.5/
RAR RUS 10906-10906 Voronezh State Technical University Artamonova Olga ol_artam@rambler.ru 0000-0002-0129-6363 Voronezh State University of Architecture and Civil Engineering Chernyshov Evgeny chem@vgasu.vrn.ru
Voronesh, Russia
 57195684636 0000-0001-8800-2657 Voronezh State Technical University Slavcheva Galina gslavcheva@yandex.ru Factors and mechanisms of nanomodification cement systems in the technological life cycle The paper presents an analysis of the kinetics of heterogeneous processes and patterns of solid formation to substantiate factors and technological methods for nanomodifying the structure and properties of cement-based composites. According to the general evolutionary model of solid formation and evolution of hydration hardening systems model, the main factors and criteria of cement systems nanomodification have been identified for all stages of the technological life cycle. In accordance with the factors of nanomodification of cement systems, the technological methods of nanomodification are identified. As a result of nanomodification, the effects in the structure formation of cement systems are predicted and confirmed by experimental data. Theoretical analysis and experimental results showed that the factors and methods of nanomodification meet the terms of controlling the fracture strength of the cement-based composites. Together, the effects of nanomodification of the structure and factors of increasing the fracture resistance will determine the effectiveness of solutions for engineering practice in terms of reducing the time and the energy costs for processes in the life cycle of cement-based composites, enhancing their quality. 10.34910/MCE.109.6 cement system nanomodification hydration hardening structure models strength https://engstroy.spbstu.ru/article/2022.109.6/
RAR RUS 10907-10907 6602801860 0000-0001-7532-0074 Penza State University of Architecture and Construction Loganina Valentina loganin@mail.ru 57190969636 0000000170652790 Penza State University of Architecture and Construction Frolov Mikhail mihail-frolovv@yandex.ru
Penza, Russia
 Humidity regime in aerated concrete wall with finishing coating The article estimates the influence of external finishing coating characteristics on the humidity regime in the walls of aerated concrete blocks with the density of 350–600 kg/m3 (D350–D600 grades). The research is in demand due to the fact that condensation of excessive moisture in the enclosing structure is one of the most common reasons for the destruction of plaster coatings for walls of aerated concrete. To assess the humidity regime in the walls of aerated concrete, the temperature of the onset of moisture condensation tsk was determined. The temperature of the onset of condensation tsk is the temperature of the outside air: a temperature drops to this level causes formation of condensate in the enclosing structure. It was revealed that due to the use of the developed dry building mixture for D350–D600 concrete blocks finishing, moisture condensation begins at a significantly lower outdoor temperature. The moisture regime in the walls of D350–D600 aerated concrete blocks was studied for the conditions of various climatic zones on the example of three cities: Rostov-on-Don, Voronezh, Novosibirsk. A linear model is obtained that reflects the dependence of the temperature of the onset of condensation tsk in the walls of D350–D600 aerated concrete blocks on the thermal properties of the wall material and the finishing layer. 10.34910/MCE.109.7 Concretes building materials buildings lime energy efficiency moisture https://engstroy.spbstu.ru/article/2022.109.7/
RAR RUS 10908-10908 CY Cergy Paris University, L2MGC Laboratory Tahar Zine El Abidine zine-el-abidine.tahar@u-cergy.fr
Cergy, France
 CY Cergy Paris University, L2MGC Laboratory Kadri El Hadj el-hadj.kadri@u-cergy.fr
Cergy, France
 26325239700 0000-0002-3352-1588 Civil Engineering Research Laboratory (LRGC), Amar Telidji University Benabed Benabed b_benchaa@yahoo.fr
Laghouat, Algeria
 CY Cergy Paris University, L2MGC Laboratory Ngo Tien-Tung tien-tung.ngo@u-cergy.fr
Cergy, France
 Influence of cement type and chemical admixtures on the durability of recycled concrete aggregates This study investigates the effect of replacement of natural aggregates with recycled concrete aggregates on the durability of concrete. Three different combinations of cement and chemical admixtures were considered, and the produced mixtures were assessed for their durability performance. The obtained results show a significant increase in the porosity of the mixtures with increasing in the percentage of recycled sand substitution, whereas the porosity increase was less pronounced for the natural gravel substitution. In addition, increasing the percentage substitution of recycled aggregates results in a decrease in density. However, this decrease is more pronounced in the case of substitution with recycled sand than for recycled gravel. Finally, the diffusion depth of the chloride ions increases with the increase of recycled gravel, regardless of the cement/admixture couple. This rise is less pronounced than in the case of concrete made with recycled sand. 10.34910/MCE.109.8 recycled concrete aggregates (RCA) density porosity chloride ions diffusion durability https://engstroy.spbstu.ru/article/2022.109.8/
RAR RUS 10909-10909 57190741611 0000-0003-1710-225X Department of Civil Engineering, Halu Oleo University Suryaningrat Edwin Romy romy.edwin@uho.ac.id
Anduonou Kendari, Indonesia
 57194653506 0000-0002-6437-6061 Department of Civil Engineering, Halu Oleo University Kimsan Masykur masykur.kimsan@uho.ac.id
Anduonou Kendari, Indonesia
 0000-0002-3286-0406 Department of Civil Engineering, Halu Oleo University Pramono Bambang Bambang.pramono@uho.ac.id
Anduonou Kendari, Indonesia
 0000-0003-4283-8138 Department of Civil Engineering, Halu Oleo University Masud Fitriah fitriah.ecek@uho.ac.id
Anduonou Kendari, Indonesia
 57211622786 0000-0001-8149-2374 Department of Civil Engineering, Halu Oleo University Sriyani Rini rini.sriyani@uho.ac.id
Anduonou Kendari, Indonesia
 Effect of ferronickel slag in concrete and mortar Cement and nickel mining industry is facing challenges such as the depletion of natural resources and insufficient landfill disposals of ferronickel slag. These problems can be solved by upgrading the ferronickel slag in concrete production without loss of quality. In this research, the use of ferronickel slag as fine aggregate and cement replacement in concrete and mortar was investigated. The ferronickel slag was ground using a ball mill to achieve two levels of fineness. The performance of mortar was assessed under heat treatment at 75 °C as a comparison to that of the normal curing. The pozzolanic activity of ferronickel slag was determined by the Frattini test. The results obtained showed that the strength of concretes increased with increasing of ferronickel slag content in the concrete mixture up to 40 %; beyond that the strength of concrete decreased. A positive effect on the compressive strength of mortar was achieved by using the slag with a higher fineness. The use of heat treatment at 75 °C enhanced the compressive strength of mortar. Assessment of the pozzolanic activity by means of the Frattini test indicates the non-pozzolanic reaction of the slag after 28 days. The use of heat treatment partially hydrated unhydrated cement grains. 10.34910/MCE.109.9 ferronickel slag compressive strength fine aggregate cement replacement heat treatment pozzolanic activity https://engstroy.spbstu.ru/article/2022.109.9/
RAR RUS 10910-10910 57205020280 0000-0002-4622-9025 Irkutsk National Research Technical University Dmitrieva Tatiana dmitrievat@list.ru
Irkutsk, Russia
 0000-0002-2834-0424 Mongolian University of Science and Technology Ulambayar Khukhuudei Ulambayar_kh@yahoo.com
Mongolia
 Algorithm for building structures optimization based on Lagrangian functions A review of modern algorithms and optimization programs is presented, based on which it is concluded that there is no application software in the field of optimal design of building structures. As part of solving this problem, the authors proposed numerical optimization algorithms based on conditionally extreme methods of mathematical programming. The problem of conditional minimization is reduced to a problem of an unconditional extreme using two modified Lagrange functions. The advantage of the proposed methodology is a wide range of convergence, the absence of requirements for convexity of functions on an admissible set of variation parameters, as well as high convergence, which can be achieved by adjusting the parameters of the objective and constraint functions. Verification of the developed methodology was carried out by solving a well-known example of ten-bar truss optimization. A comparison of the results obtained by other sources with the copyright ones confirmed the effectiveness of the presented algorithms. As an example, the problems of optimizing the cross-section of a steel beam have also been solved. Automation of the algorithms is performed in mathematical package MathCAD, which allows you to visually trace the sequence of commands, as well as obtain graphs that reflect the state of the task at each iteration. Thus, the authors obtained an original methodology for solving the optimization problem of flat bar structures, which can be extended to solve the problem of optimal design of general structures, where the optimality criterion is defined as material consumption, and the given structural requirements are presented as constraint functions. 10.34910/MCE.109.10 modified Lagrangian multiplier method building structures optimum design steel beam truss structure finite element model https://engstroy.spbstu.ru/article/2022.109.10/
RAR RUS 10911-10911 0000-0002-9613-6011 University of Transport Technology Nguyen Thi Thu Nga ngantt@utt.edu.vn
Hanoi, Vietnam
 University of Transport Technology Nguyen Anh Tuan tuanna@utt.edu.vn
Hanoi, Vietnam
 Thuy Loi University Vu Quoc Vuong vuongvlxd@tlu.edu.vn
Hanoi, Vietnam
 57212383467 0000-0001-8101-4698 Mien Tay Construction University Ngo Van Thuc nvthuc34@gmail.com
Vinh Long, Vietnam
 57207950600 0000-0003-3142-428X Mien Tay Construction University Lam Thanh Quang Kha lamthanhquangkhai@gmail.com
Vinh Long city, Vietnam
 The strength of fly ash concrete of experimental design Cement concrete has always played an essential role in the general development of the construction industry. Many studies improve the properties and durability of cement concrete by adding chemical additives and mineral additives. One of them, fly ash, is one of the most preferred applied mineral additives. Currently, the demand for fly ash is becoming an urgent problem, as it is also can reduce environmental pollution from by-products of thermal power plants not only in Vietnam but also all around the world. To evaluate the factors affecting compressive strength of concrete, such as fly ash, type of cement used, date and designed concrete grade, we based our study on the design of experiment (DOE). The influencing variables have different levels of investigation, which are based on previous studies. With the useful statistical analysis tools, the number of experiments, and the results of the experimental analysis, we can see the influence of each element and their interaction on the compressive strength of the concrete. On that basis, it is possible to choose the option with reasonably selected ingredients to achieve the expected optimal compressive strength. 10.34910/MCE.109.11 concrete grade fly ash compressive strength DOE cement concrete https://engstroy.spbstu.ru/article/2022.109.11/
RAR RUS 10912-10912 7007129183 0000-0003-1503-9234 University of Pisa Croce Pietro p.croce@ing.unipi.it
Pisa, Italy
 University of Pisa Formichi Paolo p.formichi@ing.unipi.it
Pisa, Italy
 University of Pisa Landi Filippo filippo.landi@ing.unipi.it
Pisa, Italy
 Target reliability of alternative fundamental combinations in Eurocode EN1990 In Eurocode EN1990 action effects in persistent and transient design situations for ULS checks are derived according to three different alternative expressions for combinations of actions, to be chosen in the National Annex for use in a country. The three formulations, ([6.10], or [6.10a] and [6.10b], or [6.10a modified] and [6.10b]), which are substantially confirmed in the draft version of the new EN1990 (prEN1990:2019), are not completely equivalent in terms of structural reliability. In the present study, the reliability levels associated with each of them are compared in some relevant examples considering permanent and imposed loads for different buildings categories. In the analyses, the structural reliability indexes derived using level 2 and 3 methods are discussed considering the influences of different assumptions about statistical distributions and parameters of material resistances and action effects. The results of the sensitivity analyses confirm that the reliability level for ULS checks is also strongly dependent upon the statistical models adopted. The target reliability level recommended for use in EN 1990 (and in prEN1990:2019) is commonly reached using expression [6.10], while the adoption of expressions [6.10a] and [6.10b] can lead to lower values, especially when the coefficient of variation (COV) of the material resistance is high. Expressions [6.10a modified] and [6.10b] generally lead to very significant reductions of the reliability levels in all the investigated cases, especially when permanent loads dominate the structural design. 10.34910/MCE.109.12 structural reliability; failure reliability; reliability index reliability analysis reliability assessment random variable structural analysis probability function design optimization reliability optimization https://engstroy.spbstu.ru/article/2022.109.12/
RAR RUS 10913-10913 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
 Different types of basalt fibers for disperse reinforcing of fine-grained concrete The paper concentrates on the experimental research of basalt fibers presented at Russian market with eight samples of fibers selected for this research. Five of them are chopped basalt roving (manufactured by LUKE, Rusbazalt Inc, Kamenny Vek Ltd, Armastek), one of them is chopped polymer-basalt wire (manufactured by SK Ltd), two of them are basalt microfibers (manufactured by NTC of Applied Nanotechnologies Inc.). Each of the fibers was added to fine-grained concrete at concentrations of 0.25 vol.-%, 0.5 vol.-%, and 1 vol.-%. Changes in density, compressive strength, and flexural strength were investigated. The density of fine-grained concrete increased proportionally to the quantity of chopped basalt roving. Concrete’s density decreased proportionally with the fiber percentage when using chopped polymer-basalt wire and basalt microfiber. The highest compression strength enhancement (9.8 %) of fine-grained concrete was achieved when using fibers manufactured by SK Ltd and Kamenny Vek Ltd. The highest flexural strength enhancement was achieved when using polymer-basalt fiber manufactured by SK LLC (68.6 %) and modified basalt microfiber manufactured by NTC of Applied Nanotechnologies Inc (52.9 %). 10.34910/MCE.109.13 concretes basalt fiber fiber reinforcement compressive strength flexural strength https://engstroy.spbstu.ru/article/2022.109.13/
RAR RUS 10914-10914 0000-0002-9430-3920 Northern Border University, Engineering College Jamei Mehrez mehjamei@yahoo.fr
Arar, Kingdom Saudi Arabia (KSA)
 Northern Border University, Engineering College Alassaf Yahya ysalassaf@gmail.com
Arar, Kingdom Saudi Arabia (KSA)
 Northern Border University, Engineering College Ahmed Anwar bokshe12@yahoo.com
Arar, Kingdom Saudi Arabia (KSA)
 Northern Border University, Engineering College Mabrouk Abdelkader abdmabs@yahoo.fr
Arar, Kingdom Saudi Arabia (KSA)
 Fibers reinforcement of the fissured clayey soil by desiccation The cracks caused by desiccation induce rapid failures as rapid shallow landslides in stiff and fragile clayey soils. Several environmental structures such as landfill liners and road embankments are often constructed by compaction of a series of soil layers. These works suffered in many cases of disorders due to desiccation. One of the potential valuable techniques to reduce these disorders is the short fibers reinforcement. Fibers reduce the cracks propagation and the geometric cracks characteristics such as the length, depth and opening. The paper presents an experimental characterization of the crack pattern observed in compacted samples at optimum water content (OMC) with and without fibers reinforcement. 2D Image Analysis has been used to investigate the characteristics of the geometric cracks. Alfa natural short fibers used to assure the reinforcement, reduced the carks' propagation by stopping the propagation and reducing their 3D opening (surface opening and depth growth). The role of fibers to improve the tensile strength and reduce the growth of the crack has been well-highlighted. At this stage, a simple model was calibrated to predict the tensile strength for reinforced soil specimens with short fibers considering various fibers contents and fiber's geometrical characteristics. 10.34910/MCE.109.14 desiccation cracks fibers tensile strength modeling https://engstroy.spbstu.ru/article/2022.109.14/
RAR RUS 10915-10915 Moscow State Civil Engineering University Inozemtcev Aleksandr InozemcevAS@mgsu.ru 37099331400 0000-0003-0815-4621 Moscow State University of Civil Engineering (National Research University) Korolev Evgeniy korolev@nocnt.ru
Moscow, Russia
 National Research Moscow State University of Civil Engineering Duong Thanh Qui quiduongthanh@gmail.com Lightweight concrete for 3D-printing with internal curing agent for Portland cement hydration The development of 3D printing technology requires solving material science problems to ensure the rheology of concrete mixtures with controlled mobility and high retention of volume after extrusion and also the creation of favorable conditions for the hardening of the binder. This paper investigates lightweight concretes on hollow microspheres. The rheological properties of concrete mixtures and the peculiarities of the structure formation of cement stone in the presence of a superabsorbent polymer (SAP) have been studied. The paper used standardized test methods following EN 1015-3-2007, EN 12390-1-2009, and employing modern equipment and tools (K100 KRUSS processor tensiometer, comparator, calorimeter). It was found that concrete mixtures on hollow microspheres with an average density of 1400 kg/m3 have a high ability to retain volume (buildability) of more than 90 % after extrusion with mobility of not more than 135 mm of the spread diameter. It has been shown that the use of superabsorbent polymer solutions with controlled polymerization is an effective solution to provide internal curing for the hydration of Portland cement. Calorimetric analysis of cement stone showed a positive effect of SAP on the processes of structure formation of cement stone. This is expressed by an increase in the amount of hydration products, in particular portlandite. The number of SAP solution of 0.50–1.0 % of the mass of Portland cement in lightweight concrete provides the least reduction in strength. It was found that the flexural strength varies in the range of 5.5–5.8 MPa and the compressive strength – 45.3–47.8 MPa. An increase in the SAP content of more than 1.5 % of the mass of Portland cement is characterized by a decrease in compressive strength by 8.5 %. The permissible amount of SAP in concrete is limited to 1.0–1.5 % of the mass of Portland cement. The possibility of providing internal curing for the hydration of Portland cement in lightweight concrete through the use of SAP solution has been substantiated. The obtained results of the study of lightweight concrete show high printability of concrete mixtures on hollow microspheres for 3D printing. Moreover, the implemented soluble SAP composition instead of the granular SAP is capable of providing the function of internal curing for the hydration of cement with no loss in strength. 10.34910/MCE.109.15 concretes extrusion rheology super absorbent polymers curing 3D printers concrete additives measurement compressive strength shrinkage https://engstroy.spbstu.ru/article/2022.109.15/