Heat conductivity of aerogel-based rolled materials for high-thermal isolation for equipment and pipelines

PASTUSHKOV, P.P.; Gutnikov, Sergey I.; Pavlenko, N. V.; Zheldakov, D. Yu.; Stolyarov, M. D.

doi:10.1088/1757-899x/896/1/012103

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…In particular, not only the technological process of obtaining aerated concrete is complex, but also the technological line itself, which often consists of more expensive equipment. In this regard, the most high-quality, but at the same time the most expensive, type of cellular concrete is the so-called gas silicate or autoclaved aerated concrete [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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At present, the load-bearing enclosing structures of buildings and structures are designed and built considering the increasing requirements for energy efficiency and energy saving of such structures. This is due to the need for a thrifty attitude to the energy consumed and the need to strive for the greening of construction and increase the energy efficiency of buildings and structures. In this regard, one of the most effective and proven building materials is cellular concrete. The purpose of this study was to study the influence of some prescription factors on the structure formation and properties of non-autoclaved aerated concrete with improved characteristics. Standard test methods were used, as well as SEM analysis of the structure of aerated concrete. Non-autoclaved aerated concrete with the replacement of part of the cement with microsilica in an amount from 4% to 16% MS showed higher strength characteristics compared to aerated concrete, where part of the cement was replaced by the addition of granulated blast-furnace slag and a complex additive. The maximum value of compressive strength was recorded for aerated concrete with 16% MS addition. The largest increase in the coefficients of constructive quality was observed in compositions of aerated concrete with the addition of silica fume from 11% to 46% compared with the control composition. The addition of microsilica makes it possible to achieve an improvement in the thermal conductivity characteristics of non-autoclaved aerated concrete (up to 10%). Replacing part of the cement with slag and complex additives does not have a significant effect on thermal conductivity. The obtained dependencies were confirmed by the analysis of the structure formation of the studied aerated concrete at the micro level. An improvement in the microstructure of aerated concrete with the addition of microsilica in comparison with samples of the control composition has been proven.

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Section: Introductionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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“…In thermal calculations, the moisture content of materials plays a significant role in heat transfer. The thermal conductivity of the material will depend on the sorption moisture [1][2][3][4][5]. For this reason, the protective properties of the enclosing structures may decrease.…”

Section: Introductionmentioning

confidence: 99%

Study of the dependence of equilibrium sorption humidity of heat-insulating products on temperature

Petrov

Kupriyanov

2021

E3S Web Conf.

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The desiccator method for products like mineral wool has a low accuracy, which is due to the small mass of the samples and the uneven content of the binder between the samples. The standard method does not involve testing materials at different temperatures. However, the value of sorption moisture depends not only on the nature and structure of the material, but also on the temperature conditions. At the moment, the regularities of changes in the sorption moisture content of materials depending on the air temperature have been studied only in separate scientific works and do not cover the entire spectrum of modern building materials. The paper presents the results of a study of the sorption moisture content of modern mineral wool products at various temperatures above 0 ºС. The results show an increase in sorption humidity with decreasing temperature from 22 ºС to 0 ºС. The greatest increase in humidity occurs at values of relative air humidity in the range of 90–97 %. It is shown that the standard desiccator method for studying sorption moisture requires scientific development and increased control of test conditions with decreasing temperature.

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Design and implementation of industrial hot pipeline prototypes with high vacuum multilayer insulation: Enhancing thermal performance and lifetime

Capolupo,

D’Alessandro,

De Maio

et al. 2024

Applied Thermal Engineering

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Heat conductivity of aerogel-based rolled materials for high-thermal isolation for equipment and pipelines

Cited by 3 publications

References 9 publications

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Study of the dependence of equilibrium sorption humidity of heat-insulating products on temperature

Design and implementation of industrial hot pipeline prototypes with high vacuum multilayer insulation: Enhancing thermal performance and lifetime

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