Foam concrete used as thermal insulation material

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Russian president demanded that exports of Russian gas to "unfriendly" countries be settled in rubles. The demand has raised concerns in Germany about possible supply disruptions and the impact on industry and households if utilities do not pay in robles. Europe gets about 40% of its gas from Russia. Last year, Europe imported about 155 billion cubic meters. Germany, Europe's largest economy, depends heavily on Russian gas.

The chief executive of Germany's E.ON said the German economy would face "significant damage, which should be avoided if possible" without Russian supplies. He also said it would take Germany three years to wean itself off Russian gas.  

In the event of a supply disruption, Germany's gas network regulator would prioritize home heating over industrial use, so energy-hungry manufacturers such as steelmakers would be the first to suffer, he said.

The volatile international situations will continue to affect the markets and prices of many commodities like the concrete foaming agent.

Foam concrete contains a large number of closed pores, the air in the pores is a good adiabatic medium, which can cut off the heat exchange. The lower the density, the more pores, the better the adiabatic property. Especially when the density is less than 500 μ m? The thermal conductivity of foamed concrete is less than 0.09w/m.k. Generally speaking, the material with thermal conductivity lower than 0.23 is called thermal insulation material, and the thermal insulation material lower than 0.14w/m.k is called thermal insulation material. Most of the foamed concrete is lower than 0.14w/m.k, and most of them are lower than 0.09w/m.k, so it is a good thermal insulation material.

1. Used for thermal insulation in buildings

Building thermal insulation if all the application of foam concrete, including roof thermal insulation layer, wall insulation layer, floor heating insulation layer (or cushion), is equivalent to using foam concrete to wrap the whole house, one square meter building area needs 0.2m3~0.5m3 foam concrete (roof, floor, four walls are calculated by 5cm insulation layer), a building with a building area of 10,000 square meters, you need foam concrete 2000m3~5000m3.

2. Used for building thermal insulation block

Non-load-bearing thermal insulation block: density 300kg/m3, thermal conductivity 0.05~0.08W/ m k, compressive strength 0.5MPa. The thermal insulation effect of this kind of block is the most ideal, and it is the product with the largest demand for building energy saving and the most lacking in the market. Ultra-light block is the development direction of foam concrete, it can achieve integrated thermal insulation, the wall itself can meet the requirements of 65% energy saving, save the external thermal insulation treatment, and reduce the building thermal insulation cost by 40%, 50%.

Load-bearing thermal insulation block: density 1000~1200kg/m3, compressive strength greater than 10MPa, thermal conductivity 0.18-0.22; it is lighter than red brick, but the thermal insulation is twice as high. This kind of block can completely replace red brick for load-bearing wall, it and thermal insulation, load-bearing, lightweight three functions in one, to replace red brick has great advantages, has a larger market.

3. Used for cold storage heat preservation

Foam was originally used in cold storage thermal insulation, but foam concrete pouring or masonry insulation was used in developed countries because it is easy to aging, shrinking and flammable. It mainly adopts integral cast-in-place, roof, wall, ground all foam concrete cast-in-place, no cold bridge, no gap.

4. Used for thermal insulation of industrial furnace

The main products are fire-resistant and thermal insulation bricks.

Large industrial furnaces such as iron and steel plants, glass plants, ceramic plants, non-ferrous metal smelters and cement calcination kilns need to build a layer of thermal insulation refractory brick on the outside of refractory bricks in order to reduce energy consumption. The original use of floating bead brick, alumina foam brick, the price is very high, now foam concrete refractory brick has replaced the high-priced traditional products, the price is less than half, very competitive.

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The resurgence of the global COVID-19 pandemic and the impact of the Russia-Ukraine conflict continued to cause high volatility in commodity prices. Stubbornly high inflation and rising commodity prices are likely to influence each other and thus push each other higher. The price of the concrete foaming agent may not decrease significantly in the short term.

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