Bituminous mixture heat conduction testing device

Abstract

The invention discloses a bituminous mixture heat conduction testing device. The bituminous mixture heat conduction testing device comprises a testing box, a polyurethane foam heat insulating layer, constant temperature circulating water boxes, a heating plate, a temperature data collecting instrument, a computer and an intelligent constant temperature circulator, wherein the polyurethane foam heat insulating layer is paved on the inner wall of the testing box; the testing box is internally provided with the two constant temperature circulating water boxes, and the heating plate is arranged between the two constant temperature circulating water boxes and is connected with a temperature controller; a testing test specimen is arranged between the heating plate and each constant temperature circulating water box, the testing test specimens are provided with temperature sensors connected with the temperature data collecting instrument, and the temperature data collecting instrument is connected with the computer for displaying data. The bituminous mixture heat conduction testing device disclosed by the invention has the advantages that polyurethane heat insulating foam is utilized to control the side heat of the test specimens, the loss of the side heat is reduced, and the testing accuracy is improved; the constant temperature circulator enables the temperatures of the surfaces of the inner sides of the test specimens to be uniform, a uniform heat exchange requirement is achieved, and the uniform constant temperature of the outer sides of the testing test specimens is realized, so that the testing accuracy is improved; the simulation property is strong, the operation is easy, and the testing device can be utilized to obtain a heat conductivity coefficient of a bituminous mixture.

Description

technical field [0001] The invention relates to a test device for asphalt mixture, in particular to a test device for heat conduction of asphalt mixture. Background technique [0002] At present, most of the high-grade pavement in my country adopts the structure form of asphalt pavement. The asphalt pavement is exposed to the natural environment, not only bears the repeated action of the vehicle load, but also withstands the influence of the natural environment, especially the water temperature. Asphalt pavement is very sensitive to temperature. Rutting, shifting, hugging, oil flooding and other diseases will occur under high temperature conditions, and cracks will occur under low temperature conditions. These diseases not only reduce the service level of the pavement, but also threaten driving safety in severe cases. Therefore, it is necessary to carry out research on the temperature field and heat transfer performance of asphalt pavement to reduce the influence of tempera...

AI Technical Summary

Problems solved by technology

[0004] Traditional steady-state test methods such as heat flow meter method and protected hot plate method are small in size and are often suitable for homogeneous and isotropic materials, and the test accuracy is difficult to guarantee

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