Test Background
The density determination test of building sealing materials can determine the density of sealants used in construction and civil engineering. The metal ring method is suitable for non-sag sealants, and the metal mold frame method is suitable for non-sag and self-leveling sealants.
Zhongke Testing and Reliability Experiment Center has the capabilities of environmental testing and reliability performance testing of various building materials, products and components, and provides professional mechanical property testing services such as density, low temperature and temperature properties, compression properties, elastic recovery properties, mass and volume change properties, etc. for building sealing materials.
Scope of tests
1. Sealing materials can be divided into two categories according to their strength: shaped sealing materials (sealing strips, pressure strips, etc.) and non-shaped sealing materials (sealing paste or caulking paste, etc.).
Amorphous sealing materials can be divided into plastic sealing paste, elastic-plastic sealing paste and elastic sealing paste according to their raw materials and their properties.
2. Sealing materials can be divided into polysulfide, polyurethane, silicone, chloroprene rubber, butyl rubber, acrylic glue, etc. according to their chemical composition.
At present, the three types that are used in large quantities on the market are silicone, polyurethane, and polysulfide.
Test method
Fill the metal ring or metal mold frame with sealant to make a test piece. Weigh the mass of the metal ring or metal mold frame and the test piece in the air and in the test liquid before and after filling, and calculate the density of the sealant.
The standard test conditions are: temperature (23±2)℃, relative humidity (50±5)%.
Test standard:
GB/T 13477.2-2018 Test methods for building sealing materials Part 2: Determination of density
