What are the external wall insulation materials for external wall insulation materials

With the development of the times, external wall thermal insulation materials have become more and more popular in our lives. External wall thermal insulation materials originated in Europe. Our country began piloting in the mid-1980s, and it is widely used in the field of construction. . However, the current level of building energy efficiency is still far lower than that of developed countries. The energy consumption per unit area of ​​China's buildings is still 3 to 5 times that of the developed countries with similar climate. The next small series for everyone to introduce the external wall insulation materials and external wall insulation materials to buy.

What are the external wall insulation materials

1, benzene board

The price of benzene board is the cheapest, the insulation effect is general, and it will absorb water and deform. After the insulation layer is done, some other waterproof measures are needed.

2, extruded plastic board

Extruded plate is much better than benzene plate, thermal conductivity is lower than benzene plate, and the price is slightly higher.

3, polyurethane

Is the best performance of the existing thermal insulation material, refrigerator insulation materials used in areas such as cold storage is polyurethane, thermal conductivity is far lower than the benzene board and extruded board, basically half the thickness of the polyurethane insulation layer can reach benzene The insulation effect of the original thickness of the board and extruded board, but the price is much higher than the benzene board and the extruded board.

4, mineral wool

Rock (mineral) cotton and glass wool are sometimes collectively referred to as mineral wool. Glass wool and rock wool have many similarities in properties, but their feel is better than rock wool and can improve workers' working conditions. However, it is higher in price than rock wool.

5, polyphenylene particles heat preservation slurry

This type of insulation material has higher water absorption than other materials and must be used as a crack-resistant waterproof layer when used. The crack resistant waterproof protective layer material is composed of a crack-resistant cement mortar composite glass fiber net, which can effectively control the cracking of the protective layer for a long time.

External wall insulation material purchase

1, check the appearance of the product. It requires less damage, uniform color, and accurate dimensions (length and width tolerance 4mm, thickness tolerance 2mm).

2, measure the product density. If one piece of a product is chosen, its weight is measured and its volume is measured, the density can be calculated. Under the premise of satisfying the strength requirement, the smaller the density, the better.

3, simple test strength. The requirements for the strength of thermal insulation products are mainly to meet the needs of handling, and are generally not high. They are 1/10 to 1/20 of the strength of red bricks, but they cannot be crushed when touched, and they are scattered on a pinch. According to the standard requirements, compressive strength is generally 0,5 MPa or more, that is, general products should be able to withstand a person standing on it gently (product area should be greater than the foot area.

4. Combustion performance: Combustion performance refers to all physical and chemical changes that occur during the burning of a building material or in the event of a fire. This property is caused by the ignition of the material surface and flame propagation, heat, smoke, charring, weight loss, and toxicity. Produced by the production of other properties to measure.

5, heat load shrinkage temperature: Heat load shrinkage temperature is used to indicate the heat and moisture stability of the insulation material.

6, hygroscopicity: hygroscopicity refers to the material in the air can absorb moisture properties. This property and the chemical composition of the material are related to the structure. In addition to the chemical properties of the surface of the material, the inorganic non-metallic material is also related to the microstructure formed by the material. If there are many hair pores, the moisture absorption ability is relatively strong. In addition, it is related to the diameter and structure of the capillary pores. . This is also true for organic polymer materials. The metal surface also has the property of adsorbing water molecules, which is related to the nature of the metal elements and the state of the surface structure. The hygroscopicity of the glass fiber wool insulation material in the air absorbs 3.9% moisture per square meter. Such hygroscopicity can dampen the drying of the room to prevent moisture.

7. Organic matter content: Organic matter is mainly composed of oxygen element, hydrogen element and carbon element. Organic matter is the material basis of life. Fats, amino acids, proteins, sugar, heme, chlorophyll, enzymes, hormones, etc. It can be said that as long as the product contains a certain amount of organic matter, the more the organic content, the more easily the product will burn.

Editor's summary: What are the external wall insulation materials and the external wall insulation material purchase introduced here, and hope to be helpful to everyone. If you want to know more related information, you can pay attention to this website information.

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