Organic insulation materials This article refers to those foam plastics represented by polystyrene foam and polyurethane foam that have been widely used in construction. Compared with these materials, foam concrete has great advantages in building insulation. These advantages determine that it is necessary and appropriate to replace organic insulation materials with foam concrete.
1.1 Fireproofing Advantages
Whether it is foamed polystyrene or other organic insulation materials such as foamed polyurethane, they are flammable and have strong flashover properties. The fire is fierce and difficult to put out. Even flame-retardant organic foam materials still cannot avoid fire. In some of the recent major fires in our country, flame-retardant foam plastics were used in the projects. At the same time, the burning smoke of foam plastics is very toxic and can spread up to several kilometers. The national key projects Jinan Olympic Sports Center and the new CCTV building have experienced fire scenes caused by organic insulation materials.
Foam concrete is made of cement as the main material, which is a safe and non-combustible material. Its fire resistance level is greater than 2 hours, reaching Class A fire protection standards, and can fully meet the fire protection requirements of any building. Using foam concrete for building insulation will not cause fire at all.
What’s more advantageous is that the cast-in-place foam concrete cast-in-place insulation wall we developed can completely cover the steel structure in foam concrete and protect the steel structure. Even if a fire occurs, the steel structure It is also not easy to deform and collapse, which solves the fire protection problem of steel structures and provides double fire protection.
1.2 Durability Advantages
The design life of a building is generally 50 to 100 years. Organic insulation materials have a problem of not being able to withstand aging and cannot last as long as the building. At present, the design life of organic insulation materials in relevant specifications for building insulation is mostly 20 to 25 years. This means that the insulation layer and the building cannot have the same lifespan. A building needs to be insulated at least 2 to 4 times. This repeated tossing of the building shortens the service life of the building. Because every construction will cause damage to the building.
Foam concrete has a durability of more than 50 years and can last as long as the building. One-time insulation construction can keep the building insulated for life, avoiding the shortcomings of multiple insulation constructions. The foam concrete roof insulation layer in Heilongjiang and other places in my country was constructed under the guidance of experts from the former Soviet Union in the early 1950s. It has been intact for nearly 60 years and is still in use. This has fully demonstrated the durability of foam concrete. Under the premise of standardized construction, the service life of high-quality foam concrete can reach 100 years, and it is also suitable for key construction projects.
In addition, due to the poor combination of organic exterior wall insulation and wall body, engineering accidents such as cracking and falling off are often caused. Not only does the durability of the project cannot be guaranteed, but the falling objects pose a serious threat to people. of. The organic insulation layer is peeling off both at home and abroad.
Most of the foam concrete is self-insulating for the wall, and there is no problem of the outer insulation layer falling off. A small number of external walls are insulated, most of them are anchored or dry-hanging, which is not easy to fall off, and a few are pasted. Since foam concrete and the wall are made of the same material, the bond is very strong and not easy to fall off.
1.3 Sound insulation advantages
Organic insulation materials such as foam polystyrene boards have poor sound insulation. For a foamed polystyrene wall with a 50mm thick core layer, the voices on both sides of the wall can be clearly heard, while for a foam concrete wall with a 50mm thick core layer, the voices on both sides of the wall are basically inaudible. The foamed polystyrene sandwich wall makes a loud banging sound and feels hollow when struck, but the foam concrete sandwich wall does not make that much noise and does not feel hollow when struck.
When the closed cell ratio of foam concrete is greater than 90%, it becomes an excellent sound insulation material. Some developed countries in the West use foam concrete to produce sound insulation panels.
1.4 Advantages of non-toxic and harmless
Organic insulation materials such as polystyrene foam and polyurethane foam release a large amount of harmful gases during production. The smell at the production site is choking and seriously pollutes the air. , harmful to the health of operators. In the early stages of use, there is still a residual smell. In the later stages of use, its aging and decomposition will still release harmful substances. Therefore, its production and use are not environmentally friendly. This does not take into account the white pollution it easily causes.
Foam concrete is basically made of inorganic materials. No harmful substances are produced during production, and there is no odor at the production site. It will not produce decomposition products during use and is green and environmentally friendly. From the perspective of building greening, it should also be the best choice for building insulation.
1.5 Advantages of not consuming large amounts of petroleum resources
In addition to reducing emissions, building energy conservation also has the significance of reducing my country's energy consumption and protecting national energy security. Organic insulation materials such as foamed polystyrene mostly use petroleum as the starting material, consuming a large amount of petroleum resources. Their application will aggravate my country's energy crisis. Although its use can save energy in buildings, the raw materials consume energy, causing energy saving and energy consumption to conflict, resulting in loss of energy.��The meaning of energy saving.
The raw material of foam concrete is cement, not energy. Although the production of cement also consumes energy, it is lower than the total energy consumption of raw materials and production of foamed polystyrene.
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