Device and method for testing emissivity of pavement material

Abstract

The invention discloses a device and method for testing emissivity of a pavement material, and belongs to the technical field of pavement material thermal radiation. The device and method aim at solving the technical problem that in the prior art, a standard testing method for the emissivity of the pavement material is lacked, and consequently a low-emissivity pavement or coating material cannot be selected preferably; a short-wave infrared light source irradiates a pavement material test piece, a long-wave radiation sensor detects long-wave radiation emitted by the pavement material test piece, and a radiation collecting instrument collects and processes data detected by the long-wave radiation sensor; and temperature sensor is arranged in the pavement material test piece, and a temperature collecting instrument collects and processes data detected by the temperature sensor. According to the device and method, the low-emissivity pavement or coating material can be selected preferablyby testing the emissivity of different pavement materials so as to relieve the heat island effect of a city; and the emissivity of a single pavement material can be tested, the emissivity of the testpiece containing a surface coating can be tested, and the applicability of the device and method is wider.

Description

technical field [0001] The invention belongs to the technical field of thermal radiation of pavement materials, and in particular relates to a device and method for testing emissivity of pavement materials. Background technique [0002] The road surface occupies a considerable proportion of the urban surface area. Among the many causes of the urban "heat island effect", the high-density pavement in the urban built-up area is an important reason. Under the solar radiation, the human body walking on the road not only receives the short-wave radiation reflected by the sunlight through the road surface, but also receives the long-wave radiation emitted after the road absorbs part of the solar radiation energy. The reflected short-wave radiation and emitted long-wave radiation are the main radiation sources of the human body. [0003] In recent years, road workers have tried to increase the reflectivity of the road surface and reduce the internal temperature of the road surface, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for testing the emissivity of pavement materials, so as to solve the inability to optimize low-emissivity pavement or coating materials in the prior art due to the lack of a standard test method for the emissivity of pavement materials in the prior art technical issues

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