New environmentally friendly materials! Foamed concrete will profoundly affect people's lives

Foamed cement is one of the most significant technological advancements in the more than 100 years since the birth of cement concrete. It combines cement and concrete with light weight, functionality, light weight, heat preservation, heat insulation, sound absorption, sound insulation, fire prevention, fire prevention, impermeability, waterproof, shock wave resistance, electromagnetic wave resistance, water permeability, ventilation, filtration, corrosion resistance, Dozens of functions such as water retention and energy absorption. The most functional inorganic lightweight material. Its invention and application opened up a special application field of concrete. In the future, foam concrete will profoundly affect people's lives and benefit all aspects of society, and its significance will soon become apparent.

1. Insulation application

Foamed cement contains a large number of closed pores. The air in the pores is a good insulation medium and can cut off the heat exchange. The lower the density, the more pores and the better the insulation effect. In particular, the thermal conductivity/m3 of foamed cement with a density of less than 500 kg is less than 0.09w/m•k. Generally, the thermal conductivity of the material is lower than 0.23 insulation material, and the insulation material is lower than 0.14 insulation material. Most foamed cements are less than 0.14, most of them are less than 0.09, and are good insulation materials.

2. Application of sound absorption and heat preservation

Open-cell foam cement is an excellent sound-absorbing material, while closed-cell foam cement is an excellent sound insulation material. Both have a big market, especially for sound-absorbing materials, with better prospects.

Generally, materials with an average sound absorption coefficient greater than 0.2 are called sound-absorbing materials. Its traditional products are fiber (rock mineral wool board, etc.) and porous foam plastic and foam glass. A porous sound-absorbing material with an average sound absorption coefficient of 0.8 to 1.4. It is a strong sound-absorbing material and can reach the first or second level standards.

3. Application of energy absorption function

Foamed cement has strong impact resistance, ordinary concrete can be broken with a sledgehammer, but foamed concrete is difficult to break. Foreign countries use its energy-absorbing characteristics to develop and apply a number of high value-added products, such as airport safety protection foam circuit safety protection foam block, and road accident-prone areas safety protection foam block. When an airplane or car enters the foam block protection area due to runway or road out of control, due to the impact absorption performance of the foam block, it stops and protects the airplane or vehicle from damage.

4. Anti-electromagnetic radiation application

Foamed cement is an excellent electromagnetic shielding material, which can absorb and eliminate electromagnetic waves. Recently, it has been applied to military and civil buildings with high electromagnetic radiation. Its product is radiation shielding, which is in great demand, especially in the military industry. It is estimated that the current domestic market demand is about 500,000 square meters per year. Due to the demand of developed countries If the volume is large, its export market will be larger.

5. Application of permeation filtration function

Foamed cement with an opening rate of more than 80% has excellent penetration and filtration functions and has been widely used in permeable floor tiles and grass-planting surfaces.

6. Application of fire protection function

Fire doors are large lift doors designed to cut off the spread of fire in middle and high-rise buildings. The foamed fireproof board has stronger fire resistance. After the foaming density is reduced to 800 kg/m3, the weight is light and it has a great market advantage.

7. Application of anti-seepage and waterproof function

The closed-cell foamed cement has the hydrophobicity and dew effect of the lotus leaf, so it has excellent impermeability and water resistance. There are two major markets for this foamed cement.

Pouring or laying foam concrete in all parts that need to be waterproofed, such as roofs, basements, toilets, etc., can eliminate waterproofing agents, achieve permanent waterproofing, and overcome the shortcomings of easy fall-off and failure of waterproof coatings. Using it to replace waterproof materials has low cost, long lifespan and is more competitive.

In soil or water with high chloride ion content, the foundations, foundation piles and bridge piers of concrete projects may be attacked by chloride ions. If a protective layer of foamed concrete is built or poured on the outside of these engineering structures, since the foamed cement is impermeable, chloride ions will not be carried by water to corrode the concrete.

8. Application of lightweight filling function

Road backfilling, such as approach bridge filling, soft foundation filling, bridge abutment filling, side slope subgrade filling, road widening filling, permafrost foundation filling, pavement filling on both sides of the bridge, karst cover soil filling, antifreeze Dozens of applications such as thermal insulation pouring, bridge pier foundation pit backfilling, etc. The application in this area is very developed in Japan, and it is also widely used in the United States and Europe. China imported technology from Japan. Guangdong Guan'ao Road and Bridge Company has done many road projects in China. The Ministry of Communications has actively promoted it, and its development trend is good. Such as market development, the project is very large.

9. Application of lightweight decorative materials and garden products

The application of this aspect has high added value, which is one of the profits of the foam concrete application field, and the market is large, there are many products, and there are few manufacturers, which is very promising.

10. Floating performance application

Foamed concrete has been used to manufacture offshore oil drilling platforms and other operating platforms at home and abroad. At present, offshore wind power is being developed abroad, and the foam concrete floating foundation has been widely used in offshore wind turbines.

In foreign countries, foam cement foundation platforms are widely used to build floating houses in flood-prone areas.

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