无码无套少妇毛多18pxxxx,日韩欧美一区二区福利视频,17c视频在线观看,中文字幕久久久久久妻,日本黄色精品专区网站

Shandong exterior wall insulation material is a material used by people in construction. It can isolate the temperature difference between the internal and external environment of the building and provide insulation and energy-saving effects for the building. With the continuous advancement of science and technology, exterior wall insulation materials are also constantly developing and innovating.

At present, the common Shandong exterior wall insulation materials on the market include polystyrene board, polyurethane board, mineral wool board, etc. Among them, polyurethane is one of the more commonly used insulation materials. It has excellent insulation performance and strength, and can meet the requirements of buildings in insulation, sound insulation, fire prevention, moisture resistance, etc. Mineral wool board has also been widely used in recent years because of its good environmental performance and insulation effect.

In addition, there is a relatively new insulation material-rock wool board, which is made of quartzite, basalt, etc. as raw materials, and is made of insulation board after high-temperature melting and fiberization. Rock wool has good insulation performance, high fire resistance, can burn and extinguish, and it does not contain harmful substances and has good environmental performance.

The selection of Shandong exterior wall insulation materials needs to be determined according to specific circumstances. Different areas of the building also need to choose appropriate insulation materials. For example, the northern region needs to consider insulation and sound insulation performance, while the southern region needs to consider the water resistance and moisture resistance of the material. In addition, the purpose of the building needs to be considered. If it is a commercial building, the fire resistance level of the material needs to be considered. Some places have higher fire resistance requirements, such as hotels, hospitals and other public places.

In short, Shandong exterior wall insulation materials play a vital role in construction. It can not only provide insulation, sound insulation and fire prevention functions for buildings, but also save energy and play a role in environmental protection. Therefore, when choosing insulation materials, it is necessary to make reasonable choices based on specific circumstances.