"Test Method for Inorganic Hard Thermal Insulation Products GB T 5486-2008" is a Chinese national standard, which includes test methods for testing the density and moisture content of inorganic hard thermal insulation products. Density and moisture content are important physical property parameters of adiabatic products, which directly affect their thermal insulation performance and service life. The following is a detailed introduction to the density and moisture content tests in the GB T 5486-2008 standard.
Density test: Density is an important physical property parameter of thermal insulation materials, which reflects the mass of the material per unit volume, usually expressed as the ratio of mass to volume. The purpose of density test is to accurately determine the density of inorganic hard insulation products, and to provide a basis for product quality control and performance evaluation.
Test Instruments and Equipment:
1.Balances: Ensure that the accuracy of the balance meets the requirements of the standard in order to accurately weigh the specimen mass.
2.Volumetric tester: The volume of a specimen can be determined using methods such as water immersion or gas displacement.
3.Specimen: The shape and size of the specimen shall conform to the provisions of the standard.
Test Steps:1Specimen preparation: Prepare specimens that meet the dimensions specified in the standard to ensure that the surface of the specimen is smooth and there is no obvious damage.
2.Weigh the quality of the specimen: Use a balance to accurately weigh the mass of the specimen and record the mass value.
3.Determination of sample volume:
Water immersion method: The sample is completely submerged in water, the increase in the water level is measured, and the volume of the sample is calculated from this variation.
Gas displacement method: The volume of the sample is replaced by gas (usually nitrogen in the gas replacement method), the change in the volume of the gas is measured, and the volume of the sample is calculated by calculation.
4.Calculate the density: The density is calculated from the mass and volume of the sample. The density is calculated by the formula of density = mass volume.
5.Report: The test process, the obtained data and the calculation results are recorded in detail in the test report.
Moisture content test:
The moisture content of thermal insulation material refers to the ratio of the mass of moisture contained in the material to the mass of the whole material, which has an important impact on the thermal insulation performance and durability of the material. The purpose of the moisture content test is to determine the moisture content in inorganic hard insulation products to evaluate the stability and performance of the product.
Test Instruments and Equipment:
1.Oven: Provides a stable temperature environment for the drying of specimens.
2.Balance: Used to accurately weigh the mass of a specimen.
Test Steps:1Specimen preparation: Collect specimens that meet the dimensions specified in the standard to ensure that the surface of the specimen is flat.
2.Drying the sample: Put the sample into a preheated oven and dry it at the specified temperature until the quality of the sample is basically unchanged, indicating that the water in the sample is evaporated and dried.
3.Weigh the quality of the specimen: Use a balance to accurately weigh the mass of the specimen and record the mass value.
4.Calculate the moisture content: The moisture content of the sample is calculated by the difference in the mass of the sample before and after drying. The moisture content is calculated as moisture content = (initial mass of the sample - mass after drying) mass after drying.
5.Report: The test process, the obtained data and the calculation results are recorded in detail in the test report.
Notes:1Test environment: The test should be carried out under the specified temperature and humidity conditions to ensure the accuracy and comparability of the test results.
2.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.
3.Data Processing: All trial data should be carefully processed to ensure the accuracy and reliability of the results.
By carrying out density and moisture content tests in strict accordance with GB T 5486-2008 standard, the important physical performance parameters of inorganic hard insulation products can be obtained, which provides a scientific basis for product design and quality control.