Infrared detection method for high temperature damage of concrete

A technology of infrared detection and high-temperature damage, which is applied in the direction of applying stable tension/pressure to test material strength, preparation of test samples, and measuring devices, etc., to achieve accurate analysis, rapid detection, and high sensitivity.

Inactive Publication Date: 2016-12-21
TAIYUAN UNIV OF TECH
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  • Infrared detection method for high temperature damage of concrete
  • Infrared detection method for high temperature damage of concrete
  • Infrared detection method for high temperature damage of concrete

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[0057] The following examples are used to further illustrate the present invention, but are not limited to the following examples.

[0058] 1. Principle of the invention:

[0059] The basic principle of the infrared hot line detection in the present invention is as follows: Infrared radiation is an electromagnetic wave with a wavelength between 0.75 and 1000 μm. In nature, all objects above absolute zero (-273°C) continuously radiate infrared energy, and the amount is closely related to the temperature of the object. Based on this rule, infrared detection technology has developed rapidly and has been widely used, especially for concrete materials with poor thermal conductivity and high surface emissivity, using infrared thermal imaging to detect high sensitivity.

[0060] Firstly, the TH9100WV infrared thermal imaging camera was used to scan and inspect the concrete structural members after the fire. In fact, infrared thermal imaging is the temperature distribution map of the surfa...

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Abstract

The invention discloses an infrared detection method for concrete high temperature damage. Including (1) preparation of test pieces; (2) simulated fire test; (3) infrared detection and compressive strength detection; (4) data processing steps. The present invention is mainly aimed at the C30 concrete used in ordinary civil buildings and projects, and tests the infrared temperature rise of the concrete, the fire temperature and the non-destructive detection model of the concrete compressive strength loss through the infrared detection method, and obtains the non-destructive detection model suitable for ordinary construction projects. The relative formulas of concrete compressive strength loss, fire temperature and infrared temperature rise reflect the two indicators of concrete fire temperature and compressive strength loss through infrared temperature rise, and are of great significance to the technological progress of the construction industry and social and economic development. .

Description

technical field [0001] The invention relates to a non-destructive detection method for concrete, in particular to an infrared detection method for high-temperature damage to concrete, and belongs to the technical field of construction engineering. Background technique [0002] Concrete is the most used engineering material in today's construction projects. It has the advantages of high strength, low permeability, good durability, and small deformation. In practical engineering applications, its advantages can be used to meet the requirements of large spans, large spaces and The development of super high-rise buildings requires that at the same time, the cross section of components can be reduced, raw materials can be saved, and the construction cost can be reduced. Therefore, it has been widely used. However, concrete will suffer severe bursting damage in case of fire, and the degree of bursting will become more serious with the increase of fire temperature and the improvem...

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Application Information

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IPC IPC(8): G01N25/00G01N3/08G01N1/28G01N1/44
CPCG01N25/00G01N1/28G01N1/44G01N3/08G01N2203/0298
Inventor 杜红秀陈良豪李倩吴慧萍成聪慧
Owner TAIYUAN UNIV OF TECH
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