Influence of Composition and Technological Factors on Variatropic Efficiency and Constructive Quality Coefficients of Lightweight Vibro-Centrifuged Concrete with Alkalized Mixing Water

Stel’makh, Sergey A.; Shcherban’, Evgenii M.; Beskopylny, Alexey; Mailyan, Levon R.; Meskhi, Besarion; Butko, Denis; Smolyanichenko, Alla S.

doi:10.3390/app11199293

Cited by 25 publications

(30 citation statements)

References 35 publications

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“…The following were also used in this study: a BL-10 laboratory concrete mixer (LLC "ZZBO", Zlatoust, Russia); an SMZh-539-220A laboratory vibrating platform (LLC "IMASH", Armavir, Russia); hydraulic press IP-1000 (LLC NPK TEKHMASH, Neftekamsk, Russia); an R-50 tensile testing machine (LLC "IMASH", Armavir, Russia); a 500 mm metal measuring ruler, laboratory scales, an NPL-1 device for measuring deviations from the plane, and an NPR-1 device for measuring deviations from perpendicularity (NPO LABORKOMPLEKT, Moscow, Russia) [38][39][40][41].…”

Section: Research Sourcesmentioning

confidence: 99%

Quantitative and Qualitative Aspects of Composite Action of Concrete and Dispersion-Reinforcing Fiber

et al. 2022

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The interest in using polymer-dispersed reinforcement in the construction industry in the context of sustainability has led to significant research on this scientific problem. The article is devoted to studying the processes of fiber interaction depending on its dispersion and the concrete matrix, and their combined contact work during the formation of a concrete structure, work under stresses arising in a concrete body, and during a collapse. The physical and mechanical processes of deformation and destruction of the “matrix–fiber” system were studied using high-precision microscopic equipment, and the nature of the work and deformation of fibers in concrete were revealed. The work aimed to establish and characterize the quantitative and qualitative aspects of the concrete matrix and dispersion-reinforcing fiber combined work. It was established that the best values of the adhesion index were observed at a volume content of fiber in the amount of 2% by weight of cement, regardless of the type of dispersion-reinforcing fiber. It was shown that the microstructure of polydispersion-reinforced fiber-cement specimens was denser, and microcracks formed during fracture in polydispersion-reinforced specimens had a smaller opening width. It was established that polydispersion-reinforced concrete had higher values of strength (up to 126%) and deformation (up to 296%) characteristics compared to monodispersion fiber-reinforced concrete.

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Section: Research Sourcesmentioning

confidence: 99%

Quantitative and Qualitative Aspects of Composite Action of Concrete and Dispersion-Reinforcing Fiber

et al. 2022

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“…The study used: Technological equipment—installation for the production of foam concrete and aerated concrete GBS-250 manufactured by METEM (Perm, Russia); ball planetary mill “Activator-4M” (LLC “Plant of Chemical Engineering”, Novosibirsk, Russia); Testing equipment—hydraulic press MIP-25 (LLC NPP INTERPRIBOR, Chelyabinsk, Russia); Measuring instruments—metal measuring ruler 500 mm (JSC “Stavropol Tool Plant”, Stavropol, Russia); laboratory scales HT-5000 (NPP Gosmetr, St. Petersburg, Russia); caliper ShTs-I-250-0.05 (LLC NPP Chelyabinsk Tool Plant, Chelyabinsk, Russia); thermal conductivity meter ITP-MG4 (OOO SKB Stroypribor, Chelyabinsk, Russia) ( Figure 2 b); viscometer ZM-1001 (Priborelectro LLC, Moscow, Russia); plastometer K-2ZhV (OOO NPP Tochpribor, Rostov-on-Don, Russia) [ 39 , 40 , 41 , 42 , 43 ]. …”

Section: Methodsmentioning

confidence: 99%

Mathematical Modeling and Experimental Substantiation of the Gas Release Process in the Production of Non-Autoclaved Aerated Concrete

et al. 2022

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The widespread use of aerated concrete in construction has led to the emergence of many types and compositions. However, additional research should fill theoretical gaps in the phenomenon of gas release during the formation of the structure of aerated concrete. Based on theoretical analysis and experimental studies, the article proposes a mathematical model of the swelling process based on the physicochemical laws of convection and molecular diffusion of hydrogen from a mixture and the conditions of swelling, precipitation, and stabilization of the mixture. An improved method for the manufacture of aerated concrete is proposed, which consists of introducing cement pre-hydrated for 20–30 min into the composition of the aerated concrete mixture and providing improved gas-holding capacity and increased swelling of the mixture, reducing the average density of aerated concrete up to 29% and improving heat-shielding properties up to 31%. At the same time, the small dynamics of a decrease in the strength properties of aerated concrete were observed, which is confirmed by an increased structural quality factor (CSQ) of up to 13%. As a result, aerated concrete has been obtained that meets the requirements of environmental friendliness and has improved mechanical and physical characteristics. Economic efficiency is to reduce the cost of production of aerated concrete and construction in general by about 15%.

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“…-Technological equipment-laboratory concrete mixer BL-10 (LLC "ZZBO," Russia, Chelyabinsk region, Zlatoust); drying cabinet SPU ShS-160-02 (JSC "Smolenskoye SKTB SPU," Russia, Smolensk); laboratory vibrating platform SMZh-539-220A (LLC "IMASH," Armavir, Russia); -Testing equipment-hydraulic press IP-1000 (NPK TEKHMASH LLC, Neftekamsk, Republic of Bashkortostan, Russia); -Measuring instruments-measuring metal ruler 500 mm; laboratory scales [37][38][39][40].…”

Section: Methodsmentioning

confidence: 99%

Developing Environmentally Sustainable and Cost-Effective Geopolymer Concrete with Improved Characteristics

et al. 2021

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Improving the efficiency and quality of construction mainly depends on the cost of building materials, which is about 55–65% of total capital-construction costs. The study aimed to obtain geopolymer fine-grained concrete with improved quality characteristics that meet the construction field’s sustainable development criteria and that have environmental friendliness, economic efficiency, and advantages over competing analogues. The dependences of strength characteristics on various compositions of geopolymer concrete were obtained. It was found that the most effective activator is a composition of NaOH and Na2SiO3 with a ratio of 1:2. The increase in the indicators of the obtained geopolymer concrete from the developed composition (4A) in relation to the base control (1X) was 17% in terms of compressive strength and 24% in tensile strength in bending. Polynomial equations were obtained showing the dependence of the change in the strength characteristics of geopolymer concrete on the individual influence of each of the activators. A significant effect of the composition of the alkaline activator on the strength characteristics of geopolymer fine-grained concrete was noted. The optimal temperature range of heat treatment of geopolymer concrete samples, contributing to the positive kinetics of compressive strength gain at the age of 28 days, was determined. The main technological and recipe parameters for obtaining geopolymers with the desired properties, which meet the ecology requirements and are efficient from the point of view of economics, were determined.

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Influence of Composition and Technological Factors on Variatropic Efficiency and Constructive Quality Coefficients of Lightweight Vibro-Centrifuged Concrete with Alkalized Mixing Water

Cited by 25 publications

References 35 publications

Quantitative and Qualitative Aspects of Composite Action of Concrete and Dispersion-Reinforcing Fiber

Quantitative and Qualitative Aspects of Composite Action of Concrete and Dispersion-Reinforcing Fiber

Mathematical Modeling and Experimental Substantiation of the Gas Release Process in the Production of Non-Autoclaved Aerated Concrete

Developing Environmentally Sustainable and Cost-Effective Geopolymer Concrete with Improved Characteristics

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