Evaluation of Temperature of Road Surface during Construction

The process of cooling of road pavement of hot asphalt concrete mixes at construction of highways is considered. The article presents the description of a mathematical model of calculation of temperature fields of pavement. The mathematical model contains the one-dimensional non-stationary heat conduction equations for each layer. Boundary conditions on the surface of the top layer take into account the heat transfer by convection and radiation. The boundary conditions of the fourth kind are between the layers. The temperature boundaries of the lower layer are constant. Testing the model is performed for limited and semi-infinite rods. The article presents the results of testing the mathematical model. The numerical solution of heat conduction equations held by the implicit scheme. In article the method for calculating the temperature of paving surface is offered. The calculated values of the temperature of paving depending on the speed of a wind, solar radiation, thickness of a coat layer, a difference of thickness of a layer of hot asphalt concrete and reference temperature of a layer are presented. It is established that under identical conditions the porosity of material of the layer has the greatest impact on the change in temperature.

N.N. SINITSYN, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.V. MAKONKOV, Engineer

Cherepovets State University (5 Lunacharskogo Avenue, 162600, Cherepovets, Russian Federation)

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