Advantages and disadvantages of insulation materials in practical use
It is understood that there are A wide variety of thermal insulation materials on the market, civil building external wall thermal insulation materials should use the combustion performance of grade A non-combustible materials.Building once the use of substandard organic insulation materials, like a long-term hidden danger.Energy conservation, emission reduction, scientific environmental protection are not false, afraid of putting the cart before the horse.At present, the main insulation materials for external wall insulation include eps(polystyrene foam), XPS(extruded polystyrene foam), pu(polyurethane foam), rock wool (mineral) board, glass wool blanket, ultra-light polystyrene particle insulation paste.These materials generally have the disadvantage of energy saving and fire prevention.Organic materials have poor heat resistance and are easy to burn. When burning, a large amount of heat and toxic smoke are released, which will not only accelerate the spread of the fire, but also cause casualties of trapped people and rescue workers.However, inorganic materials, which contain dust and fine fibers, easily pollute the air and breed bacteria, have long been potential hazards to people's health.Its thermal insulation performance is limited, the application range is limited.
Some advantages of the external insulation scheme are also preconditions.For example, external insulation can improve the thermal stability of the structure and the room for buildings of small scale (such as residential buildings), while the heat storage function of external insulation is not obvious when there are structures with large heat capacity (partition walls, columns) and air conditioning equipment inside the building.The disadvantage of external insulation is that the insulation materials need to be selected, not subject to rain erosion and not affected by air pollution.Most insulation materials have a certain degree of hygroscopicity, material hygroscopicity, thermal resistance will be seriously reduced, so when the use of this structural scheme, should be covered in a waterproof layer or surface.
