Spring in the north, dry and windy, is a fire-prone season, and building fire accidents often occur. Once a fire occurs, it is life-threatening and the loss is huge. According to the requirements of the current national architectural design fire protection standards, the building exterior wall insulation materials must use materials with a combustion performance of A or A1. Rock wool insulation boards are used as high-quality building materials for exterior walls. After a fire occurs, it will not release heat and toxic fumes, and it also has the tendency to block the spread of flames, and has excellent fire resistance; in addition to good fire resistance, rock wool board also has good thermal insulation function, so it is used in the fields of building exterior walls and other fields. widely used. As a building material, rock wool board also has a certain fire resistance limit, so what is the fire resistance limit of rock wool?
What is the fire resistance limit of rock wool board? It refers to the time it takes for the rock wool board to lose its bearing capacity, integrity or thermal insulation from the time it is exposed to fire under standard test conditions, generally in hours. So what is the fire resistance limit of rock wool board? Rock wool board is an inorganic material and has good fire resistance. The fire resistance limit of rock wool board will affect its thermal resistance value according to its density. In addition, the thickness of rock wool board will also affect its fire resistance limit. Under normal circumstances, the temperature resistance of rock wool board can reach 600 degrees, and it will not change when used under 600 degrees. Rock wool boards of the same thickness, depending on the density, bulk density and other factors, generally have a fire resistance limit of about 1.5-3 hours, and some rock wool boards with better fire performance can even reach 5 hours. The increase of fire resistance limit can bring time for fire rescue, can slow down the loss caused by fire, and save people’s lives, so the fire resistance limit of rock wool board is very important.
