Weight Of Portland Cement Research Articles

Analysis of the influence of the aluminosilicate sorbents on the immobilization of <sup>137</sup>Cs in the cement compound and its mechanical strength

Studies have been carried out to determine the main parameters characterizing the quality of cement compounds: 137Cs leaching rate and mechanical strength. As sorption additives, aluminosilicate sorbents were used, obtained from clay-salt slimes of JSC “Belaruskali” as a result of water and acid-water treatment to increase the content of the clay mineral illite, which is the main component in the composition of aluminosilicate sorbents. Model aqueous solutions of 137Cs were used as liquid radioactive waste, including those with a NaNO3 content of 150 g/dm . It has been established that the use of aluminosilicate sorbents makes it possible to reduce the rate of 137Cs leaching from cement compounds, which indicates a higher degree of 137Cs fixation in the matrix material compared to samples of cement compounds without sorption additives. The efficiency of the aluminosilicate sorbent for 137Cs immobilization during cementation of a model solution of liquid radioactive waste is 3 times higher than the well-known and widely used sorption additive (bentonite clay from the 10th Khutor deposit, Khakassia, Russia). Determination of the mechanical strength of samples of cement compounds with the addition of 5–15 % aluminosilicate sorbents showed that this indicator is 8–9 times higher than the standard value (4.9 MPa). The optimal dose of a sorption additive is 5–10 wt.% of the weight of Portland cement, which does not cause a significant decrease in the strength of the cement compound compared to a compound without the use of an additive and, at the same time, will provide a high level of 137Cs immobilization. The obtained research results indicate the prospects of using the developed aluminosilicate sorbents as a sorption additive for 137Cs immobilization when handling liquid radioactive waste.

Análise da redução do consumo de cimento Portland por meio da utilização de nanotubos de carbono de paredes múltiplas funcionalizados em argamassa

Abstract The use of carbon nanotubes in cementitious materials improves the mechanical properties of these composites and increases their compressive and flexural strength. The main objective of this study was to evaluate the technical feasibility of reducing the Portland cement content by using functionalized multi-walled carbon nanotubes (MWCNT) in mortar samples, using mechanical properties as parameters (compressive strength, flexural strength and modulus of elasticity). Experimental results allowed us to conclude that the addition of MWCNT in 0.1% by weight of Portland cement, to the mortar samples allowed a reduction of the Portland cement content by up to 10%, while the water/cement ratio remained unchanged without affecting the mechanical behavior.

Дисперсное армирование цементных систем аморфной стеклометаллической фиброй

The fiber was made from an amorphous microwire of the Co69Fe4Cr4Si12B11 alloy in a glass shell of two sizes: diameter D = 17 and 50 μm, length is 7 and 15 mm, respectively. The influence of its geometric parameters, concentration (0.5—3%) and method of introduction on mobility, average density, bending strength and compression of cement systems (solutions) have been studied. The 54% increase in the flexural strength of the cement system was established in the case of its reinforcement with amorphous glass-metal fiber with D = 17 μm in an amount of 0.5% by weight of Portland cement and 22% one in the case of reinforcement with fiber with D = 50 μm in an amount of 1%. In this case, the compressive strength changes slightly. The introduction of fiber increases the crack resistance coefficient of the studied cement systems from 0.098 to 0.116—0.164.

“The Exploration of a Double and Ternary Composite of Self-Compacting Concrete with Metakaolin and GGBS’’

Self-Compacting Concrete (SCC) is a modern form of concrete that does not involve vibration it during laying or compaction operations. The use of fine materials such as Metakaolin (MK) and GGBS can ensure the required concrete property. One possibility for minimising the cost of self-compacting concrete is to employ mineral admixtures such as Metakaolin and GGBS. It also lowers the heat of hydration. This study adopted (OPC 53) and M30 grade of concrete. In the first trail, MK was kept constant at 5% while GGBS was varied starting at 30% with increments of 5% (30%, 35%, and 40%). In the second trail, MK was kept constant at 10% while GGBS was varied starting at 30% with increments of 5% (30%, 35%, and 40%) replacement by the weight of Portland cement, and performance is assessed and compared to conventional concrete mix. The effect of mineral admixtures on self-compacting concrete workability, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity, With a water cement ratio of 0.47 and manufacturing sand as fine aggregates and 12.5 mm coarse aggregates, a powder content of 520 kg/m3 (as per IS code10262-2019) is chosen as the binder material (Fine aggregate and cement) To improve the flow of the concrete, the superplasticizer poly carboxylate ether was used. As a result, self-compacting concrete's flow and filling capacities have significantly improved. MK5 (double blended mix) and MK5 + GGBS35 (triple blended mix) have higher 28-day strength than other mixes, while MK5 + GGBS35 has a higher modulus of elasticity than other mixes.

Prospects for using amorphous ferromagnetic alloy microwire for reinforcement of cement mortar

Traditionally, fibers for fiber-reinforced concrete are made of metal, polypropylene, basalt or glass. На сегодняшний день для строительства актуально использование волокон с уникальными электрофизическими свойствами. The possibilities of using a microwire made of an amorphous ferromagnetic alloy based on cobalt with a shell of borosilicate glass in concrete technologies are studied in this paper. The influence of the content of fibers of different sizes (length 7 and 15 mm) on the rheological and physico-mechanical properties of the solution was established. The deterioration of the workability of mixtures and the average density of the composite with the introduction of the studied fiber is shown. It has been established that the spread diameter of the mortar mixture with a fiber content of 0.5...3.0 % by weight of Portland cement is reduced by 9.8...26.1% compared to the control composition. It is shown that the short fiber (7 mm) at the maximum content (3 %) leads to a more significant decrease in the average density (up to 9.6 %) compared to the long fiber (15 mm) of the same concentration (reduction is no more than 4 %). A positive effect on the flexural strength and crack resistance of the solution was established. The increment of flexural and compressive strength ranges from 1.11 to 1.54 and from 0.99 to 0.78 respectively with increasing fiber concentration. The presence of fiber in the composition of the solution allows you to increase the crack resistance from 0.098 to 0.164. The increase in the crack resistance coefficient for compositions with a fiber 7 mm long is 51...68 % and compositions with a fiber 15 mm long is 22...37 %. The possibility of using such microwire based on a ferromagnetic alloy for dispersed reinforcement of cement solutions opens up prospects for the creation of “smart” materials.

Eco-, economic- and mechanical- efficiencies of using precast rejects as coarse aggregates in self-compacting concrete

This paper investigates the eco-, economic- and mechanical- properties of self-compacting concrete (SCC) containing recycled coarse aggregates generated from prefabricated concrete rejects (PRA) or construction and demolition wastes (CRA). A total of 720 specimens from 36 unique SCC mixes are prepared and tested. The effects of the key parameters including, water-to-binder ratio (w/b), fly ash replacing ordinary Portland cement weight ratio, recycled coarse aggregate replacing natural coarse aggregate volume ratio, heat curing temperature, mixing method or the addition of steel fibers, on the fresh and hardened properties of SCC are experimentally explored. In addition to the experimental study, cradle-to-gate life cycle cost (LCC) analysis and life cycle assessment (LCA) of the SCC are carried out, where these are done through considering different levels of functional units. Based on the results of the experimental work, LCA and LCC, it is found that the PRA based concrete shows ecological-, environmental- and economic- benefits over conventional SCC with slightly compromised rheological and mechanical properties. When considering only the volumetric equivalence, it is observed that a higher w/b, the inclusion of higher amount of recycled coarse aggregate (RCA), or fly ash, or using a lower curing temperature can efficiently reduce the cost and environmental impacts of SCC with PRA. PRA concrete products are more eco-friendly and less cost intensive than those associated with the CRA ones due mainly to the shorter distance to transport PRA compared to CRA. Beyond the volumetric functional unit, the results of LCC and LCA show that, as indicated by carbon dioxide equivalent-, embodied energy- or cost- intensity, a higher w/b, the incorporation of higher content of RCA or fly ash, and using a lower curing temperature no longer benefit the eco-, environmental and mechanical performance of recycled coarse aggregate SCC (RCASCC) and the effect of curing temperature becomes ambiguous.

Prediction of mechanical and durability characteristics of concrete including slag and recycled aggregate concrete with artificial neural networks (ANNs)

This research aims to create an artificial neural networks (ANN) model to forecast mechanical and durability properties (compressive strengths and the durability test of rapid chloride migration test (RCMT)) of waste-included concrete according to the features of the reference samples. Moreover, this experimental study evaluated the mechanical characteristics and long-term durability of concrete when using a synergic of ground granulated blast furnace slag (GGBFS) and recycled concrete aggregate. This experimental study evaluated concrete's mechanical characteristics and long-term durability when using a synergic of ground granulated blast furnace slag (GGBFS) and recycled concrete aggregate. Concrete samples were made with different binder content and water to binder ratios, including the RCA at substitution levels of 25 percent and 50 percent as well as slag at substitution levels of 20 percent and 40 percent by weight of Portland cement in order to evaluate the influence of waste materials on concrete mixtures. The mechanical characteristics of concrete deteriorated when the quantities of recycled aggregate increased in all replacement ratios. However, the findings of the mechanical characteristics suggest that slag can reduce the detrimental effects of substituting coarse aggregate with RCA in the early ages of the samples. In the case of durability, applying RCA increases the chloride ion migration rate in concrete. Slag mitigates the detrimental impacts of recycled aggregate by enhancing hydration products, except for early stages.

The Structural Formation of Cement Stone Modified by a Solution of Superabsorbent Polymer

With the development of 3D technologies in construction, the development of formulations that are indifferent to the influence of the environment is in demand. Conditions of intense water loss from cement systems arise during the layer-by-layer printing process. This leads to a decrease in density, high shrinkage, and a decrease in the strength and durability of the composite. The use of superabsorbent polymer (SAP) solutions, in contrast to granules, will provide hardening Portland cement with a water supply for internal care of hydration processes. The aim of the work is to study the effect of SAP solution on the processes of structure formation of cement stone, hardening in unfavorable conditions. In this paper, the features of the structure formation of cement systems in the presence of SAP are established. It is shown that the use of polymer in an amount of no more than 1.5% by the weight of Portland cement provides the formation of a more perfect crystalline structure of the cement stone, which allows for an increase in the degree of cement hydration. When the amount of SAP is ≥ 1.5% by the weight of Portland cement, a decrease in the intensity of the maxima corresponding to hydration products is observed.

Evaluating Simultaneous Impact of Slag and Tire Rubber Powder on Mechanical Characteristics and Durability of Concrete

In this experimental study, the impact of Portland cement replacement by ground granulated blast furnace slag (GGBFS) and micronized rubber powder (MRP) on the compressive, flexural, tensile strengths, and rapid chloride migration test (RCMT) of concrete were assessed. In this study, samples with different binder content and water to binder ratios, including the MRP with the substitution levels of 0%, 2.5% and 5%, and the GGBFS with the substitution ratios of 0%, 20% and 40% by weight of Portland cement were made. According to the results, in the samples containing slag and rubber powder in the early ages, on average, a 12.2% decrease in the mechanical characteristics of concrete was observed, nonetheless with raising the age of the samples, the impact of slag on reducing the porosity of concrete lowered the negative impact of rubber powder. Regarding durability characteristics, the RCMT results of the samples were enhanced by using rubber powder because of its insulation impact. Moreover, adding slag into the MRP-included mixtures results in a 23% reduction in the migration rate of the chloride ion averagely. At last, four mathematical statements were derived for the mechanical and durability of concrete containing the MRP and GGBFS utilizing the genetic programming method.

Mechanical, physicochemical, microstructural and self-cleaning performance of nano-titanium dioxide containing photocatalytic cement mortars exposed to elevated temperatures

In this study, the effect of thermal exposure on the mechanical, physicochemical, microstructural and self-cleaning properties of photocatalytic cement mortars was investigated. 1%, 2%, 3% and 4% of the ordinary Portland cement weight was replaced with nano-TiO2 particles. Mortars were heated at a rate of 2 °C/min to 200 °C, 400 °C, 500 °C, 600 °C, 700 °C and 800 °C. Compressive and flexural strengths, mass, water porosity, ultrasonic pulse velocity, optical microscopy, scanning electron microscopy, X-ray diffraction and thermogravimetric analysis tests were conducted before and after heating the mortars. The experimental results showed that nano-TiO2 particles have a significant influence on the residual properties of the mortars. The addition of TiO2 increased the resistance of the mortars to thermal deteriorations and preserved the residual mechanical, physicochemical and microstructural properties of the mortars. Additionally, for the first time, the influence of thermal exposure on the photocatalytic performance of cement composites was evaluated in this study by evaluating the degradation of rhodamine B. The photocatalytic performance was unaffected up to 400 °C, however, further heating deteriorated the photocatalytic performance of cement mortars.

Influences of Sodium Lignosulfonate and High-Volume Fly Ash on Setting Time and Hardened State Properties of Engineered Cementitious Composites.

Engineered Cementitious Composites (ECC) exhibit high ductility accompanied by multiple narrow cracking behavior under uniaxial tension. The study experimentally investigated the influence of sodium lignosulfonate and high volumes of fly ash (HVFA) on the properties of fresh and hardened ECC, with the experimental variables including the amounts of fly ash, polyvinyl alcohol (PVA) fibers, and sodium lignosulfonate. The test results were discussed extensively in terms of the initial and final setting times, compressive and tensile behavior, and drying and autogenous shrinkage. The results indicated that the initial and final setting times of ECC were increased along with the sodium lignosulfonate content of up to 1%. The drying shrinkage development was governed by the first 14 days. In addition, the major autogenous shrinkage developed for more than 28 days. The amounts of fly ash, PVA fibers, and sodium lignosulfonate considerably impacted the autogenous shrinkage. Moreover, it was found that the dosage of sodium lignosulfonate at 0.5% of the weight of Portland cement optimally reduced the shrinkage and enhanced the tensile strain capacity for ECC.

A Comparison of Organic Cement Made from Recycled Waste Material and Portland Cement

Organic cement is an environmentally friendly alternative to Portland cement which is acquired by recycled organic waste and Mediterranean soil. Waste management is a global problem. The physical characteristic test results of the organic cement show that the weight test of fresh organic concrete is 2081kg/m³ and the dry weight of concrete is 2032kg/m³ which are smaller than Portland cement concrete's which are 2525kg/m³ and 2405 kg/m³ respectively. The fineness of alternative cement grains that passed the 200 mesh sieve is 56%, which is more than Portland cement's which is 52%. The solid weight of alternative cement is 1200kg/m3 whereas the solid weight of Portland cement is 1250kg/m3.

Producing Sustainable Concrete using Nano Recycled Glass

Background: Many tools and techniques have been recently adopted to develop construction materials that are less harmful and friendlier to the environment. New products can be achieved through the recycling of waste material. Thus, this study aims to use recycled glass bottles as sustainable materials. Objective: Our challenge is to use nano glass powder by the addition or replacement of the weight of the cement for producing concrete with enhanced strength. Methods: A nano recycled glass powder is prepared by crushing and storming a glass bottle to obtain a Blaine surface area of approximately 28 m2/g and conforming to the chemical requirements for natural pozzolana class N, according to ASTM C618. The outcome of using nano recycled glass for theaddition and replacement of ordinary Portland cement weight on the compressive and flexural strengths of concrete at 7, 28, and 90 days is investigated. Results: The concrete mixes with 2.5%, 5%, 7.5%, and 10% replacements of cement by nano recycled glass powder show improvements in compressive and flexural strengths of up to 12.77% and 7.66%, respectively, at 28 days. Meanwhile, mixes with the addition of 5% nano glass powder show best improvements in compressive and flexural strengths of up to 11.49% and 7.46%, respectively.

Effect of Refuse Derived Fuel Ash on the Hydration Characteristics of Portland cement

The use of alternative fuels in Portland cement manufacturing reduces the amount of emissions such as CO2 and NOX gases. Also, it causes a considerable energy cost reduction. In addition, the use of alternative fuel has a positive impact on environment as a result of reduction of solid waste disposal. Therefore, the aim of this work is to investigate the effect of residual ashes produced from using RDF solid waste as biofuel in Portland cement manufacture on its properties. The solid waste used in this study is refuse derived fuel (RDF) mainly from municipal waste. The effect of adding different ratios of the ash, produced after burning such solid waste, to Portland cement on its hydration characteristics was investigated. This is done through the determination of standard water of consistency, initial and final setting times, compressive strength, chemically combined water content as well as the phase composition of the hydration products via the XRD examination. The ratios of ash used were: 0.0, 0.5, 1.0, 1.5 and 2.0% by weight of Portland cement. The samples with RDF ash showed relatively high values of compressive strength compared to blank sample at early ages of hydration up to 7 days.

Reusing calcined sediments from Chorfa II dam as partial replacement of cement for sustainable mortar production

Dam siltation is an alarming problem that significantly affects the dam's lifetime and water storage capacity. In Algeria, the removal of dredged sediment has become a significant environmental impact and an economic issue. In this context, the utilization of calcined sediments as an artificial pozzolanic material could reduce greenhouse gas emissions in the cement industry. This paper addresses the objective of valorizing calcined sediments in sustainable mortar production on fresh and hardened states of grouts and mortars. Moreover, three dry curing methods were used to accelerate improving the strength of the different mortars at a rate of 5, 15, and 25% by weight of Portland cement (CEM I 42.5 N). The first method was applied at 10 °C, and the other two at 20 °C and 40 °C. X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) analysis showed a real advantage of heat treatment at 750 °C of sediments to acquire pozzolanic behavior. A substitution rate of 25% affected the fluidity of cement grouts with calcined sediments at 60 min with a loss of fluidity, even with a high dosage of plasticizer. Indeed, the best mechanical results of the mortars were observed at cure temperatures of 20 °C and 40 °C. With an acceleration of the pozzolanic activity at 90 days for a cure at 40 °C and 180 days at 20 °C, the development of compressive strength is relatively higher than that of the control mortar. In conclusion, the carbon footprint of the final mortars showed that a high substitution rate reduces CO2 emissions, representing a reduction of 3%, 10%, and 17% respectively for the formulation of mortars based on 5%, 15%, and 25% calcined sediment.

Evaluation of the chemical index model for predicting supplementary cementitious material dosage to prevent the alkali-silica reaction in concrete

This study investigates the chemical index model effectiveness in predicting the minimum replacement of several types of Supplementary Cementitious Materials (SCMs) to mitigate the potential Alkali-Silica Reaction (ASR) in concrete. The experimental program results evaluating four natural aggregates (AF1, AF2, AF3, and AF4) and two Recycled Concrete Aggregates (RCA1 and RCA2), as presented here, were used in the model predictions. The SCMs used in this study consisted of fly ash class C (FA1), fly ash class F (FA2), ground granulated blast-furnace slag (SL), and silica fume (SF). For each SCMs, three levels of Portland cement replacements were used in the production of mortar bars: 15%-20%-25% for FA1-FA2; 20%-40%-60% for SL; and 5%-8%-10% for SF. The natural aggregates were tested according to the ASTM C1260 accelerated mortar bar test. For the RCA, an alternative preparation procedure was applied in the experimental phase to eliminate variability in the results given the RCA's high absorption.Further testing was then implemented for the aggregates classified as potentially reactive by evaluating different SCMs replacement levels to mitigate ASR using the accelerated mortar bar method, following the ASTM C1567. A Monte Carlo simulation was conducted to evaluate the chemical index prediction uncertainty, based on the model inputs statistical variation. The SCMs evaluated in this investigation were effective in mitigating ASR while used in sufficient proportion. The most effective SCMs in reducing ASR was silica fume, with a 10% replacement of Portland cement's weight, fly ash class F was next (15–25%), and finally ground granulated blast-furnace slag (40–60%). The chemical index has proven to give good results when predicting the minimum replacement of supplementary cementitious materials required to suppress ASR based on its chemical composition.

POTENTIAL FOR REPLACEMENT OF PORTLAND CEMENT BY CERAMIC RESIDUE IN THE SOIL-CEMENT MIXTURE FOR APPLICATION IN PAVING LAYER

In 2018, of a total extension of 87,563 kilometers of road network, only 34.2% of the total presented satisfactory conditions to users. One of the main reasons for this scenario is linked to the high cost of maintenance, including the need for soil stabilization, since the composition of the pavement layers is directly linked to its resistance and durability. In this scenario, the chemical stabilization technique with soil-cement emerges as an alternative for using the soil, which initially did not present corresponding parameters for the respective use. However, the growing demand for replacement of Portland Cement in engineering services, due to the carbon dioxide levels released into the atmosphere during its production, has supported research that deals with the substitution of binder by waste generated by the production sectors, namely, red ceramic waste from the ceramic block industry. This research aims to evaluate the carrying capacity of soils stabilized with cement and the partial replacement by red ceramic waste. Soil characterization tests were carried out, which provided parameters for the dosage of the materials, and subsequent performance of the compaction, expansion and penetration tests. Based on the need to stabilize the soil classified as clayey, group A-7-6, and susceptible to great variation in volume, the addition of 13% by weight of Portland Cement to the mixture was evaluated and subsequent replacement of the binder in percentages of 20 and 30%. The results demonstrated a reduction in specific mass by increasing the substitution by RCR (Red Ceramic Residue), and also for the expansion presented by the compounds. The CBR test evaluated the percentage of 20% replacement as the one with the highest load capacity. For paving purposes both percentages of substitution analyzed are within the parameters that satisfy their respective uses in sub-base layers of flexible pavement.

PENGARUH PENAMBAHAN LIMBAH PLASTIK JENIS THERMOSETTING TERHADAP MUTU BATA RINGAN (HEBEL)

<p>At this time, plastic is a material that is needed by the wider community and its impact is also extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry to impose a program to use paid plastic bags in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden on the community to buy it. The results showed that the compressive strength of light brick with the model / type of BN s.d. B10.0 with 10 variations of the mixture of the addition of plastic waste starting from (1.0 to 10.0)% to the weight of Portland Cement (PC) there is a decrease in the average compressive strength. The lowest was the addition of 10.0% plastic waste with an average compressive strength of 9.88 kg / cm². The regression equation obtained Y = 0.042 X ² - 1.177 X + 18.84 with a correlation value R ² = 0.934, meaning that the addition of plastic waste ranging from (1.0 to 10.0)% of the weight of Portland Cement (PC) has the effect of "very strong "against the compressive strength. So we can get a picture that by adding the addition of plastic waste affects the compressive strength decreases. So that it can be investigated with other compositions by adding Fly Ash and sand made with a mixture ratio of 1 PC: 2 Aggregate (Sand and Fly Ash), with the hope that this Fly Ash waste can also be used for lightweight brick building elements</p>

Fly ash of thermal power plant - micro fill for hydro technical concrete

The article presents the option of using ash - fly ash of the New-Angren Thermal Power Plant (NATPP) as micro filler of a raw mix of hydraulic concrete, as the most appropriate solution to the economic and environmental problems of the Tashkent region, Republic of Uzbekistan. The total amount of utilized ash and slag waste for the 9th month of 2019 is 45,630 tons, ash disposal 2554 tons in the NATPP. These figures show that, annually, only 12-13% of ash and slag waste is used by consumers for various purposes, the remaining 87-88% of ash and slag waste accumulate in ash and slag dumps and pollute the environment of the region. The chemical composition of fly ash as a part of the raw mix of hydraulic concrete was studied, in comparison with the chemical composition of Akhangaran cement grade M400, its physical and mechanical properties were determined. We have carried out several laboratory experiments, we obtained a quantitative dependence of the effect of the ash-cement ratio on cement consumption to obtain hydraulic concrete of the required strength. According to the test results, it was found that the heat of hydration released during the setting process decreases in proportion to the ash content. This property is of great interest when concreting massive hydraulic structures in the hot season. Experiments show that when replacing part of the cement with fly ash on the first day, the set of strength slows down, and after 7 days it accelerates by 12-15%. With the use of fly ash in an amount of 40% by weight of Portland cement of grade 400, heat dissipation during hydration is reduced by almost 30-35%, which is very important for hydraulic concrete, which increases crack resistance and resistance in an aggressive environment. Summarizing the above, it can be concluded that the use of large-tonnage fly ash of the NATPP in concrete technology is a big state task, solving the priorities of the further development of the national economy and one of the strategic ways to solve the environmental problem in the NATPP zone.

High-strength lightweight concrete with internal curing for 3D-printing in construction

In the global information space there is a positive trend in the number of publications devoted to the technology of building 3D-printing. As functional additive for internal care of concrete superabsorbent polymer (SAP) can be used. It was found that the mobility of high-strength lightweight concrete mixtures with SAP is decreased in contrast to cement pastes. The decrease of the spread diameter of the concrete mixture with an increase of the SAP content to 2.3 % by weight of Portland cement is to 20 %. The SAP content of less than 1.5 % by weight of Portland cement provides the required mobility of the concrete mixture and the average density of high-strength lightweight concrete. Taking into account the requirements for the strength of the studied concrete, the optimal content of SAP is 1.0-1.5 % by weight of Portland cement. The efficiency of the use of solutions of superabsorbent polymers for reducing shrinkage deformations of the concrete in contrast to granular SAPs is proved. This is especially actual for concrete used in adverse hardening conditions of Portland cement, for example in 3D-printing in construction. It was shown that the concentration of SAP less than 1.5% by weight of Portland cement allows to ensure the mobility of the mixtures and preservation of concrete strength.