Rockwool sandwich wall panel has excellent fire resistance. Its raw materials, production process and formula make it have good fire resistance. Rock wool sandwich panels give full play to the unique properties of rock wool core materials, and have remarkable effects in fire prevention, thermal insulation, sound absorption and sound insulation. The test results show that the rock wool sandwich board has the fire resistance of more than 1000 degree C.
As for the fireproof limit of rock wool sandwich board, it is usually 2 hours, but this depends on the fireproof grade of rock wool sandwich board. The fireproof limit of rock wool sandwich board with high fireproof grade can reach 5 hours. If the fireproof grade of rock wool sandwich board is needed, it is suggested to purchase it from a regular manufacturer, whose product quality is guaranteed.
What are the criteria for determining the refractory limit of rockwool sandwich wall panels? When any of the following three conditions occurs, it can be explained that the rockwool sandwich wall panel
specimen reaches the fire resistance limit. The criteria for determining the fire resistance limit of rock wool sandwich panels are as follows:
1. Loss of fire insulation
Rock wool sandwich panel specimens lose the role of fire insulation and also lose the thermal insulation. Components (such as wallboard) with fire-proof partition function lose the role of fire insulation when the average temperature of backfire surface is higher than the initial surface temperature of the specimens 140 C, or when the maximum temperature of the backfire surface is higher than the initial temperature 180 C, which indicates that the specimens lose the role of fire insulation.
2. Loss of integrity
Non-load-bearing wall and partition wall have their own partition function. In the test, when there are holes and voids penetrating cracks or fire, the integrity of the specimen is destroyed.
3. Loss of support
Non-load-bearing components (such as non-load-bearing walls, partitions, etc.) lose their support capacity as their own disintegration or collapse; beams, floor slabs, roof panels and other flexural components collapse in the test process, or the maximum deflection of the specimens exceeds L/20, indicating that the specimens lose the ability to resist deformation.
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