"Test Methods for Inorganic Hard Thermal Insulation Products GB T 5486-2008" is a Chinese national standard, which stipulates various test methods for inorganic hard thermal insulation products, including flexural strength tests. The flexural strength test is an important index to evaluate the flexural performance of adiabatic products under force, and the results can be used for product quality control and product performance optimization and improvement. The flexural strength test in the GB T 5486-2008 standard will be described in detail below to ensure the accuracy and reliability of the test.
Test purpose: The main purpose of the flexural strength test is to determine the flexural strength of inorganic hard insulation products under standard conditions, so as to evaluate their mechanical properties and structural strength, and provide a reference for product design and production.
Test Instruments and Equipment:
1.Testing machine: Use an electronic universal testing machine or other testing machine with corresponding performance to ensure that its accuracy and sensitivity meet the standard requirements.
2.Supporting device: Provide a suitable supporting device to ensure that the specimen can be uniformly loaded with force during the test.
3.Measuring tools: Use appropriate measuring tools, such as micrometers or digital micrometers, to accurately measure the dimensions of the specimen.
Preparation of test samples:
1.Specimen shape: According to the dimensions specified in the standard, the specimen that meets the requirements is prepared, usually in the form of a cuboid or beam.
2.Number of specimens: Perform as many sets of tests as needed for more reliable results.
3.Specimen surface treatment: ensure that the surface of the specimen is flat, and there shall be no obvious defects and damage.
Test Steps:1Preparation before the test: adjust the testing machine to a suitable working state, calibrate and confirm that the parameters meet the standard requirements.
2.Specimen mounting: Properly install the specimen on the testing machine to ensure good contact between the specimen and the supporting device.
3.Loading process: At a defined loading speed, the force is gradually applied until the specimen is damaged. Load and displacement data during loading are recorded.
4.Data processing: According to the load and displacement data obtained from the test, the flexural strength of the specimen is calculated.
Recording and reporting of trial results:
1.Load-displacement curve: Draw the load-displacement curve during the test to observe the mechanical properties of the specimen.
2.Flexural strength calculation: According to the data obtained from the test, the flexural strength of the specimen is calculated, which is usually expressed as the ratio of the load to the cross-sectional area of the specimen.
3.Report: The test process, results, and possible influencing factors are recorded in detail in the test report to ensure the accuracy and traceability of the data.
Notes:1Test environment: The test should be carried out under the specified temperature and humidity conditions to ensure the comparability of the test results.
2.Test speed: The test should be carried out in accordance with the loading speed specified in the standard to ensure the reliability of the results.
3.Specimen preparation: The preparation of specimens should be carried out in accordance with the requirements specified in the standard to ensure the repeatability and comparability of the test.
By carrying out the flexural strength test in strict accordance with the GB T 5486-2008 standard, reliable product performance data can be obtained, which provides a scientific basis for the design, production and quality control of inorganic hard insulation products.