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if the external wall finish layer of the building is not properly constructed, it is easy to have hollowing, falling off, uneven dividing joints, incomplete, pollution or uneven color
Therefore, the inspection and control of its bonding quality is not only related to the beauty of the building, but also related to the prevention of falling from high altitude and personal safety

At present, the inspection of the bonding quality of the facing layer is mostly to ensure the requirements of the appearance, that is, the bonding is flat, the surface has no residual adhesive, and the pattern splicing is correct and beautiful
However, there is still a lack of reliable, simple and easy inspection means for the bonding defects of the building exterior wall facing layer such as debonding and hollowing

At present, the main methods to detect the bonding defects of the exterior wall facing layer of buildings are infrared thermography, hammering, visual appearance inspection and so on

1、 What is infrared thermography detection of building exterior wall facing layer
Infrared thermographic testing of building exterior walls, also known as thermographic nondestructive testing (tndt), is a non-contact testing method
The infrared thermal image is used to detect the detected part in a large area, which can be directly seen in the form of thermal image, and recorded and displayed; The detection conclusion can be obtained by analyzing and analyzing the thermal image with high precision

At present, it is widely used in the detection of hollowing in the external wall facing layer, the detection of roof and wall leakage, the detection of pipe leakage, and the quality detection of energy-saving projects

Compared with other nondestructive testing methods, infrared thermal imaging nondestructive testing has the following advantages: ① fast data display, ② infrared detection heat source and detector do not need to have physical contact with the tested object; ③ Easy to realize on-site inspection; ④ Safe, no radioactive substances, fast surface heating , No damage to the detected object; ⑤ It has a wide range of applications, ⑥ non-contact, long-distance, real-time, fast, full field measurement, etc

2、 Application range of infrared thermography detection
1
Hollowing detection of exterior wall facing layer
2
Roof and wall leakage detection
3
Pipeline leakage detection
4
Energy saving project quality inspection

3、 Infrared thermography detection function
Through the application and development of infrared thermal image detection technology, infrared thermal image technology will play an increasingly important role in property management, preventing accidents, ensuring the urban safety system, and ensuring the quality of building energy-saving projects

4、 Working procedure of infrared thermography detection and identification

(1) Workflow of using infrared thermography to detect the bonding defects of building exterior wall facing layer

(2) The ownership certificate of the tested house and the original engineering drawings and other materials required for the pre investigation shall be provided by the client
In the event that the client is unable to provide the above materials and the living materials are incomplete, the testing unit shall conduct on-site pre investigation according to the actual situation

(3) On the basis of pre investigation, select the date of on-site inspection and formulate the implementation plan of on-site inspection

(4) After formulating the inspection plan, carry out on-site inspection
According to the data recorded in the on-site inspection, the infrared thermogram is processed, and the degree of debonding and hollowing of the exterior wall facing layer of the tested object is analyzed

(5) Use infrared thermography to detect the bonding defects of the exterior wall facing layer, and prepare the inspection report

5、 What requirements should be met in the inspection cycle of the bonding defects of the exterior wall finish?
1
Within two years after the completion of the new building, the first inspection shall be carried out for the bonding defects of the exterior wall facing layer, and then every two years

2
If the expansion, reconstruction and comprehensive renovation projects of existing buildings include exterior wall renovation projects, the first inspection shall be carried out for the bonding defects of the exterior wall facing layer within two years after the completion of the project, and then every two years

3
For existing buildings that have been completed for more than 10 years, the bonding defects of the exterior wall facing layer should be tested every two years

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Company Name: MCC Construction Research Institute (Shanghai) Co., Ltd

Name:: Ms. Miss Chen

Telephone: 021-51870573

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