The properties of mineral wool in something similar to asbestos fiber. It was widely used in the work on the thermal insulation of buildings and structures. In addition, such cotton wool is also an excellent "suppressor" of noise, which significantly increases its building value. The term "mineral wool" is general. So name a group of building materials, which includes "cotton wool" slag( we will designate SHV), glass( SV) and stone( KV).The difference is in the raw material, which is reflected in the characteristics. Particularly well-known is glass wool, which is remembered by the fact that it "pokes" like small needles. It is used everywhere because it is a fairly inexpensive material.
Thermal insulation characteristics of mineral wool
Mineral wool is produced in several types. It is necessary to know that the thermal insulation characteristics depend directly on the thickness of the fiber of the mineral wool. They are higher in material with a thinner fiber. This indicator for SV is within 5-15 microns, for SV and KB it is from 4 to 12. This material is suitable for use at sufficiently high temperatures. The limiting( in degrees Celsius) are: for CB - 500, for SW - 300, for КВ - 600.
It is necessary to know that mineral wool is produced in the form of plates and mats on its basis. They all differ in density. More "soft"( P - 75, P - 125) are used for thermal insulation of engineering communications of buildings, walls, ceilings, etc. "Hard"( PZh - 175, PZ - 200) are used for insulation of metal frames,where it is made three-layered. As the middle layer and used the brand of the prostate.
Dimensions of plates and mats: length from 1000 mm( PZH-75) to 2000 mm( mats) width from 500 mm to 1000 mm thickness from 50 mm to 80 mm
The "mineral wool" group also includes basalt fiber. It can withstand 1000 degrees and does not lose its properties at a temperature of -190 degrees. This is achieved due to the absence of impurities and binding components in the fabrication of the material. This production technology does not allow the formation of sheets or coils from it. Basalt fiber is simply poured. The second option - it "stuffed" in some form.
Any material from the group "mineral wool" is an excellent sound absorber. Mineral wool is not subject to combustion, at very high temperatures it only melts. It is resistant to the effects of substances such as solvents, oils, alkalis. Even acid of medium concentration can not damage mineral wool. And another big plus mineral wool - a slight shrinkage. In other words, the dimensions of the slabs or mats do not change over time, which is also important in construction. One of the advantages of this material is that it does not absorb moisture. Fibers, bound together by special additives, simply repel water.
Disadvantages of mineral wool:
- can release harmful substances. However, this occurs at fairly high temperatures, and in normal conditions, mineral wool is not more dangerous than some other building materials;
- dust formed from the ingress of microscopic fibers into the air, has a harmful effect on the lungs and the respiratory tract. Therefore, when working with this material, protective equipment should be used.
If we talk about the relative safety for human health, the glass wool "looks" more attractive.
