Теплопроводность Высокопористых 
Материалов

Михайлович, Румянцев Борис; Дмитриевич, Жуков Алексей; Викторовна, Смирнова Татьяна

doi:10.22227/1997-0935.2012.3.108-114

Cited by 10 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ïîðèñòûå òâåðäûå òåëà â ñîâðåìåííîé òåõíèêå øèðîêî ïðèìåíÿþò â êà÷åñòâå êîíñòðóêöèîííûõ [1,2] è òåïëîèçîëÿöèîííûõ (â òîì ÷èñëå ñòðîèòåëüíûõ) ìàòåðèàëîâ [3,4,5]. Ê òàêèì òåëàì ïðèíàäëåaeèò áîëüøàÿ ãðóïïà êîìïîçèöèîííûõ ìàòåðèàëîâ (êîìïîçèòîâ), â êîòîðûõ âîçíèêíîâåíèå ïîðèñòîñòè îáóñëîâëåíî êàê òåõíîëîãè÷åñêèìè ïðîöåññàìè ïîäãîòîâêè è ñìåøåíèÿ êîìïîíåíòîâ êîìïîçèòà è ïîñëåäóþùåé ïîëèìåðèçàöèè ñâÿçóþùåãî [6], òàê è ýêñïëóàòàöèîííûìè óñëîâèÿìè, â òîì ÷èñëå ïðè çíàêîïåðåìåííûõ íàãðóçêàõ [7].…”

Section: ââåäåíèåunclassified

Two-sided Estimates of Thermal Conductivity Coefficient of a Porous Body Skeleton

Zarubin¹,

Novozhilova²,

Sergeeva³

2018

Mat. mat. model.

View full text Add to dashboard Cite

Porous composite materials are widely used in engineering as structural and heat-insulating materials. The presence of pores in such materials is due to both the technology of their manufacture and the operating conditions.One of the most important factors in the process of designing products from a porous composite is the complex of thermophysical characteristics of the material. This characteristic determines the application area of the material.Among the thermophysical properties the leading role is played by the coefficient of thermal conductivity. This coefficient for some porous materials can be determined experimentally, however, in order to reduce the time and resources needed, a theoretical study of this characteristic is more relevant.Theoretical investigation of the thermal conductivity coefficient of a porous composite allows us to predict its possible values depending on the composition of the material and its porosity. Such information about the composite is necessary at various stages of working with the material from its preparation to the construction of a structure from it.There are many works devoted to approaches to the theoretical evaluation of the coefficient of thermal conductivity of a porous material. However, due to a significant spread of its values, an actual task is to construct guaranteed two-sided estimates of the possible values of this material characteristic.As is well known, there are some difficulties in constructing lower estimates of the properties of a porous material. In this paper, to overcome this difficulty, a modification of the structural model of the porous body was used in conjunction with the dual formulation of the stationary heat conduction problem in an inhomogeneous solid.The modification of the structural model of a porous body in this paper is as follows: a hollow spherical particle is replaced by a solid sphere with an equal external radius. The solid sphere in turn is represented by a composite ball consisting of an inner ball of some conventional material and an outer spherical layer of the carcass material of the porous body. The equivalent thermal conductivity of the material of the inner ball is to be determined.The modification of the structural model of the porous body proposed in the work allowed to obtain two-sided estimates of the possible value of this coefficient. Also, the obtained estimates were compared with unimprovable upper bound for this characteristic.The obtained results will allow us to predict two-sided estimates of the thermal conductivity coefficient of perspective heat-insulating and structural porous materials.

show abstract

Section: ââåäåíèåunclassified

Two-sided Estimates of Thermal Conductivity Coefficient of a Porous Body Skeleton

Zarubin¹,

Novozhilova²,

Sergeeva³

2018

Mat. mat. model.

View full text Add to dashboard Cite

show abstract

“…If the building is not equipped with fire crosscuts, it belongs to a class K3 fire danger according to [23].…”

Section: Publications Reviewmentioning

confidence: 99%

The Efficiency of the Ventilated Gap of the Double-Skin Facade Systems Using Fire Crosscuts

et al. 2016

View full text Add to dashboard Cite

Abstract. Double-skin facade is an excellent material for decoration of buildings. Despite the large number of advantages over other types of finishes, ventilated facades also have their drawbacks. In particular, a violation of installation conditions and fire safety regulations can lead to serious consequences. Innovative materials and structures in the field of fire safety are analyzed in this paper. The article deals with fire protection methods, special attention is given to the unit of fire crosscuts in the air gap of double-skin facade. Analysis of experimental data has revealed some drawbacks of this method and the necessity of design improvements.

show abstract

“…During the Second World War, research and technological work were dis-continued everywhere with the exception of the United States. This allowed the United States to master the large-scale production of foam glass, mainly for the needs of the Navy, and then for many years to become a leader in the production and research of this technology [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the technology for the production of foam glass aggregate

et al. 2020

View full text Add to dashboard Cite

The article presents the results of a study of the state of production of a foam glass and the nomencla-ture of its products. It is shown that it is expedient to use the recycled glass obtained from the bottle battle, the defective glass and the double-glazed windows as a raw material for the production of the foam-glass. The re-quirements are formulated for glasses, which should have low viscosity values in the range of foaming tempera-tures. The features of the technology for the production of the foam glass aggregate at the specialized lines are outlined. The technology features are the composition of the charge and temperature conditions of burning. The mixture for the production of the foam glass aggregate consists of glass flour, organomineral blowing agent con-taining water and food glycerin, as distinct from the slab foam glass, where soot or coke is used as a blowing agent. The results confirm the effectiveness of the use of the foam glass aggregate as a soundproofing backfill for floors. Currently, about 70% of the foam glass aggregate is used for roofs and stylobates; the rest is used in landscape design, road construction, foundations and major repair. In the future, the areas of application of the foam glass aggregate can be significantly expanded in the direction of building systems, lightweight aggregates, etc., which involves in-depth studies of the properties of this material.

show abstract

Теплопроводность Высокопористых Материалов

Cited by 10 publications

References 0 publications

Two-sided Estimates of Thermal Conductivity Coefficient of a Porous Body Skeleton

Two-sided Estimates of Thermal Conductivity Coefficient of a Porous Body Skeleton

The Efficiency of the Ventilated Gap of the Double-Skin Facade Systems Using Fire Crosscuts

Optimization of the technology for the production of foam glass aggregate

Contact Info

Product

Resources

About