slag wool

Slag wool - one of the most common sound and thermal insulation materials.Slag is a kind of mineral wool.The main raw material for the production of this material is blast furnace slag, which is processed into microfibers.Next, the fibers with a binder pressed and held them in forming plates / sheets.The average length of mineral wool fibers is 16 mm, a diameter of 4 to 12 microns.These figures are roughly the same for all types of mineral wool.

Slag wool, most often insulated non-residential premises or any temporary structures.Because of their high water absorption, the material can not be used as insulation of facades of buildings, or water pipes.

Specifications slag wool

1. Thermal conductivity - 0,46-0,48 W / (m * K).
2. maximum use temperature - 250 degrees.
3. sintering temperature - 250-300 degrees.
4. Heat capacity - 1000 J / (kg * K).
5. Binder - 2.5-10%.
6. Sound absorption coefficient - 0,75-0,82.
7. Vibration - no.
8. Class of heat resistance - NG (not lit).
9. allocation of harmful substances - is.
10. Twit - there.

Technical data suggests that this material is a bit inferior to the specific parameters of other varieties of mineral wool, such as glass wool or rock wool.This is especially true of thermal conductivity and sintering.

where you can see photos of slag wool.

Advantages The main advantage of mineral wool insulation is the possibility of both straight and curved surfaces.The material is very easy to install on rounded surfaces.Insulation is a good sound insulator.Subject to the rules of operation can last more than 50 years without any loss of sound and thermal insulation properties.An important advantage of the material is its low cost.

Slag - not new and well-studied material.Its installation is sufficient, easy and does not require any additional knowledge.Insulation can be laid by one person.

Disadvantages For all its benefits slag wool has several drawbacks.The material does not tolerate sudden changes in temperature.

blast furnace slag, which is produced from this material has high levels of acidity.After contact with the material, even minor amounts of moisture, acid is formed, has a devastating impact on the metal.Therefore, slag wool used on metal surfaces where there is a risk of moisture is not recommended.

During installation the material peeled off small particles of fibers.Because you need to work with slag wool in a respirator and protective clothing.

Harmful substances in the slag

phenol-formaldehyde resin, a part of slag wool, have a negative impact on human health.Some experts believe that these substances are very dangerous to humans.However, the manufacturers claim that the concentration of harmful substances is very small and can not take any risk.In order not to risk their health, it is better to buy the material is only known and trusted manufacturers.

In the opinion builders, using the heater, said that slag - practical and inexpensive material with a long service life.The main thing - to comply with all technical specifications and safety measures during installation.