Thermal Conductivity of The Gravel Pavement Layer

Number of journal: 12-2022
Autors:

Galkin A.F.,
Pankov V.Yu.,
Zhirkova E.O.

DOI: https://doi.org/10.31659/0585-430X-2022-809-12-33-37
УДК: 625.7

 

AbstractAbout AuthorsReferences
Among the important parameters determining the technical solutions in design of roads in the permafrost area is the thermal resistance of the structural layers of road pavement and the road foundation. The purpose of the present research was to quantify the effect of the degree to which pores in the in the gravel bedding of the road structure are filled with ice or sand on the value of the thermal conductivity coefficient of the ice-gravel and sand-gravel mixture. For the analysis, the classical formula for calculating the thermal conductivity coefficient (K. Lichtenecker’s formula) of a three-component mixture was used. Cases of filling the pores in the gravel bedding with ice and sand of different humidity were considered. It is shown that by selecting a particular filler of the pores of the gravel bedding, it is possible to significantly alter the thermal resistance of the structural layer of the road foundation or structure. This, in turn, allows to regulate the temperature regime of the roads without resorting to the creation of new structural layers. The results of numerical calculations are presented in the form of 2D and 3D graphs which allows to visually assess the effect of the material and the degree of filling of the pores on the thermal conductivity coefficient of the mixture. The graph allows to quickly assess the possible variation in the thermal conductivity coefficient of the structural layer and to select a correct, reasonable technical solution during the design. For example, to justify the need for the use of a special thermal protection layer in the pavement.
A.F. GALKIN1, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.Yu. PANKOV2, Candidate of Sciences (Geology and Mineralogy) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
Е.О. ZHIRKOVA2, Graduate Student (This email address is being protected from spambots. You need JavaScript enabled to view it.)

1 Melnikov Permafrost Institute Siberian Branch Russian Academy of Sciences (36, Merzlotnaya Street, Yakutsk, 677010, Russian Federation)
2 North-Eastern Federal University (58, Belinskogo Street, Yakutsk, 677027, Russian Federation)

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For citation: Galkin A.F., Pankov V.Yu., Zhirkova E.O. Coefficient of thermal conductivity of the gravel pavement layer. Stroitel’nye Materialy [Construction Materials]. 2022. No. 12, pp. 33–37. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2022-809-12-33-37


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