What is a Non-combustibility Tester?
With social development and the improvement of people's living standards, building safety has received increasing attention. As an important device for testing the fire resistance of building materials, the analysis of its testing principle is of great significance for improving building fire safety. The building materials non-combustibility testing instrument is a high-temperature testing device designed based on the national standard GB/T 5464-2010. It is mainly used for evaluating the non-combustibility of homogeneous and heterogeneous building materials at 750℃ and is a key device for determining whether a material's combustion performance reaches Class A.
The combustion performance of building materials is one of the important indicators for measuring their fire resistance. The Building materials incombustible test furnace is an experimental device used to test the combustion performance of building materials. Its testing principle is based on the analysis of various physical and chemical changes in building materials during combustion.
Working Principle
The building materials non-combustibility testing furnace mainly consists of a furnace body, a heating system, a temperature control system, a gas supply system, and a data acquisition system. During the test, the sample is placed inside the furnace chamber, and the heating system heats the sample while simultaneously supplying appropriate amounts of oxygen and nitrogen gases. The temperature control system monitors and controls the temperature inside the furnace to ensure the sample remains at a constant temperature during combustion. The data acquisition system records various data points in real time during the sample combustion process, such as combustion rate and flue gas composition.
Operating Procedures
Check that the main unit and heating furnace are placed stably.
Confirm that the equipment, computer power supply, voltage regulator, and all wiring connections are normal.
Start the computer and open the program interface of the building materials non-combustibility tester.
Turn on the main power, voltage regulator, and heating switch. Remove the sample holder and insertion device from the furnace.
Adjust the input power of the heating furnace to stabilize the furnace temperature at 750±5℃. Click "Start Test." The temperature drift should not exceed 2℃ within 10 minutes.
Place the sample into the furnace. The operation time should not exceed 5 seconds.
While placing the sample into the furnace, press the "Run" button on the program interface to start timing.
During the test, when the sample is burning, press the "Burning Timer" button on the program interface to record the burning time. After burning, press the "Burning Timer" button again to stop timing.
Press the "Return" button on the program interface to stop the test and record the test data.
Repeat steps 5) through 9) until all samples have been tested.
Shut down the computer.
Shut down the main power supply.
Precautions
Operators should carefully read the instruction manual and familiarize themselves with the instrument's structure and operating methods.
Keep the testing environment and equipment clean to eliminate potential quality issues and address any problems promptly.
Strictly follow the prescribed start-up and shutdown procedures.
If any abnormality occurs during the test, stop using the equipment immediately and resume testing only after inspection and repair.
When the equipment is not in use for an extended period, disconnect the power cord.
Stop the experiment when all temperatures have reached equilibrium. The duration is 60 minutes.
A continuous flame lasting 5 seconds or longer on the visible surface of the sample should be considered a continuous flame.
If the furnace temperature reaches final equilibrium after 30 minutes (i.e., the temperature drift (linear regression) measured by the thermocouple does not exceed 2°C within 10 minutes), the experiment can be stopped. If temperature equilibrium is not reached within 30 minutes, the experiment should continue, and the final temperature equilibrium should be checked every 5 minutes. When the furnace temperature reaches the final temperature equilibrium, the experiment should be terminated after 60 minutes.
Importance of Non-combustibility Testing
Non-combustibility testing is a crucial process for determining whether materials meet the non-combustibility requirements of specific fire safety standards. This test requires placing the material in a controlled environment and subjecting it to high temperatures to observe whether it ignites, burns, or contributes to the spread of fire. Materials that pass these tests are non-combustible and are therefore considered safe for use in areas where fire resistance is critical, such as building construction, especially fire-resistant components like walls, floors, and ceilings. Non-combustibility test results are essential for architects, engineers, and builders, helping them select materials that enhance the fire resistance of structures, ensure compliance with building codes, and protect life and property from fire hazards.
Calibration and Maintenance
Calibration Work:
1. External Calibration:
① Periodic Calibration: Perform periodic external calibration of the building material non-combustibility testing instrument according to the calibration cycle provided by the equipment manufacturer to ensure its measurement accuracy and precision.
② Calibration Standards: Select standard samples or devices that conform to national standards or industry specifications for calibration to verify whether the testing instrument's measurement results meet expectations.
2. Internal Calibration:
① Zero Calibration: Before each use, adjust the zero point of the testing instrument to ensure its stability and accuracy.
② Sensitivity Calibration: According to standard requirements, regularly calibrate the sensitivity of the testing instrument to ensure its accurate detection of the non-combustible properties of building materials.
Maintenance:
1. Cleaning and Maintenance:
① Regular Cleaning: Keep the surface of the testing instrument clean to prevent dust or dirt from affecting measurement accuracy.
② Lubrication Maintenance: Regularly lubricate the moving parts of the testing instrument to ensure smooth operation.
2. Component Inspection and Replacement:
① Regular Inspection: Inspect the connections and operating status of all components of the testing instrument. Address any abnormalities promptly.
② Component Replacement: Replace severely worn components promptly according to the equipment's usage to ensure the normal operation of the testing instrument.
3. Environmental Protection:
① Avoid Moisture: The testing instrument should be placed in a dry, ventilated area to avoid the effects of a humid environment.
② Dust and Shock Protection: Take measures to prevent dust from entering the equipment and avoid vibration or impact that could damage the equipment.
Applications and Prospects
With the increasing prominence of building fire safety issues, the application of building material non-combustible testing furnaces in the field of building fire safety is becoming more and more widespread. By testing and analyzing the combustion performance of building materials using this equipment, a scientific basis can be provided for building fire protection design and material selection, thereby improving the fire safety performance of buildings. In the future, with the advancement of technology and in-depth research, there is still considerable room for improvement in the testing principles and applications of building material non-combustible testing furnaces. For example, new heating methods and temperature control technologies can be explored to improve testing accuracy and efficiency; at the same time, this equipment can also be applied to other fields, such as environmental protection and chemical engineering, to promote technological progress and development in related fields.
As a key testing device for ensuring building fire safety, the building material non-combustible testing furnace, with its rigorous scientific testing principles, standardized and meticulous operating procedures, and comprehensive and systematic calibration and maintenance system, together constitutes a reliable technical support for the fire performance evaluation of building materials. From the precise coordination of the core heating and temperature control systems to the dynamic monitoring of gas supply and data acquisition, this equipment not only provides the construction industry with a standardized means to determine whether materials meet combustion performance standards, but also promotes the deep integration of fire-resistant material research and development with building safety design through continuous technological optimization and application expansion. Looking to the future, with the deepening of intelligent control technology and multi-field cross-disciplinary research, the building material non-combustibility testing furnace will achieve breakthroughs in improving testing efficiency and expanding application scenarios, providing strong technical support for building a safer and more sustainable building environment.
2025-11-13 14:31