Specifications basalt insulation, advantages, disadvantages and scope of application

By Admin | Construction Materials
18 April 2016

Stone wool is often used for thermal insulation of houses - in fact she is not afraid of fire, and assembled easily and is inexpensive.And one of the most popular of its type is basalt insulation, technical characteristics and properties of which depend on where it is specifically used.Incidentally, we note that this material - one of the purest in terms of ecology.

Specifications basalt wool


  1. wool from basalt - and this is possible
  2. On the characteristics of stone wool
  3. Where used basalt wool
  4. About cons of basalt insulation
  5. Video: Features of basalt insulation

basalt wool - and this is possible

Since the insulation is a type of mineral wool, then it has several names, among them - or basalt stone, wool.And it is not only superior in strength characteristics of all other types of mineral wool, but is completely safe for humans and nature.Compared with mineral wool made from metallurgical slag, basalt insulation mor

e environmentally friendly, easier to cut and install, and lasts longer.

molten rock gabbro-basalt, forming fine fibers form the basis of basalt wool.By and large, this is glass, not quartz and basalt.A coined (or rather, seen) was the material Hawaiians.Once, when one of the volcanoes again vomited lava and cold, the locals found in the remnants of lava amazing fibers are long and strong.Later, that was done by nature, could be repeated and people inventing production of basalt fibers.

Volcanic Paroda - basalt.

For this rock to be crushed and melted.The temperature in the melting furnace is very high - 1500 degrees, not less.Then the melt is fed on special drums, which rotates blown air jet.As a result, the fibers obtained having a thickness of not more than 7 microns and a length of - less than 5 centimeters.To make the fiber resilient and strong, it added a special composition for their binding.Then, the cotton was heated to 300 degrees by passing through the press two times.

On the characteristics of stone wool

Thermal conductivity - low

fibers in Basalt insulation have strict orientation, and located very chaotic, so the structure of the substance turns the air.Countless air between layers of thin stone fibers - an excellent thermal insulator.Therefore, the coefficient of thermal conductivity in the material is very small - its value lies in the range of 0.032 to 0.048 watts per meter per Kelvin.This corresponds to the stopper, the foam rubber and polystyrene, both extruded and usual.

Let's compare the technical characteristics of basalt insulation and other materials.Take, for example, 10 cm. The mat of basalt insulation with a density of 100 kilograms per cubic meter.To heat preservation effect was the same, it is necessary to build a ceramic brick wall thickness of 117 centimeters.If the brick is made of clay, the wall should be even thicker - 160 centimeters.From silicate bricks will have to pay a two-meter wall and the layer of the tree should be at least 25.5 centimeters.

Moisture absorption - virtually zero

This material has the property of hydrophobicity.Water falling on him, can not penetrate inside, thus insulating properties do not change.But if you spend a similar experience with a conventional mineral wool, it will incorporate a fair amount of water.Wet wool to keep warm is not - because water is getting into its pores, significantly increases the thermal conductivity of the material.So if you need to warm humid place, such as a sauna, then take not the usual glass wool and basalt - can not go wrong.Water absorption volume is not more than 2%.

Water resistant
No water soaks and wraps fiber basalt wool, t. To. In the production process, it is impregnated with special oils.

ability to pass pairs - a great

Basalt fiber, regardless of its density, has excellent water vapor permeability.Moisture contained in the air easily penetrates through the insulation layer, without forming condensation within it.This is especially important for the bath or sauna.Basalt wool itself does not get wet, still securely stored heat.Therefore, in areas isolated by this material, comfortable to live - temperature and humidity are optimal modes.Water vapor permeability is about 0.3 mg / (m · h · Pa)

fire resistance - high

in accordance with the requirements that apply firefighters wool from basalt fiber is considered to be non-combustible material.But that's not all - it is able to block the path of the open fire.The maximum temperature that can withstand the basalt insulation, without reaching the melting point - 1114 0C.This allows it to isolate the devices operating at high temperatures.

If we consider the performance of the heat insulation for fire safety (defined by NPB 244-97), the rock wool is referred to the non-combustible materials (group NG).So it is determined to GOST 30244 and SNIP 21-01-97.Thus, no restrictions when using this heater is not available.Any building, structure, design and construction elements can isolate this material.

Video: Testing basalt wool flammability

Obstruction of sound - at a high level

With regard to acoustic properties, and they have good basalt wool - in terms of sound insulation, naturally.This insulation is able to mute the sound waves vertical walking inside the walls.With this nice room isolated from external noise.By absorbing sound waves, stone wool reduces reverberation time that protects against noise, not only the room, whose walls are insulated with this material, but also the neighboring room.

strength of the material inside the material of basalt fibers randomly arranged, and a part of them extends in a vertical direction.Because of this, even not very dense stone wool is able to withstand considerable loads.Thus, at 10% deformation basalt wool has the compressive strength of 5 to 80 kPa.The particular value of this index depends on the density, characteristic of the brand of the material.Such strength properties of stone wool ensure that the insulator will last a long time without changing its shape and size over the whole period of use.

basalt wool fibers.

biological and chemical activity - low

Stone wool is chemically passive - is its undoubted advantage.If it lay close to the metal surface, you can be sure one hundred percent that the rust on the metal appears.And aggressive biological environments of basalt insulation is absolutely easy.He is not peculiar to any rot or mold damage and other harmful microorganisms.He steadfastly maintains invasion of house mice and rats - because these rodents of stone wool is not of "teeth".High resistance to aggressive substances allows the insulation to isolate many of the technical facilities that operate in difficult conditions.

Security - normally

Stone wool is made of natural raw materials - mineral basalt.Its fibers are connected by formaldehyde resin.It gives the necessary strength characteristics of the material and makes it more dense.Though they say that the phenol is dangerous, but not in this case.Because of basalt wool, he can not stand, because even completely neutralized during the production of the material.However, even at the stage of manufacture of the mineral insulation phenolic evaporation is very small - much smaller than the allowable limit of 0.05 milligrams per m2 / h.

Unlike glass fibers, basalt fibers irritate the skin does not, is not pricked and do not cause allergies.Today, the construction market has a large number of different grades of stone wool density, the technical characteristics which differ from each other.But all types of basalt insulation are durable and long service life.

Where used basalt wool

This insulation can be used in almost all building structures.They can be isolated as the roof of any shape and the walls, partitions, floors.In addition, due to its characteristics basalt insulation is good enough where the other would be useless insulator.Next list, which will be particularly practical to use this material.

  • rooms with high humidity, such as saunas and baths.
  • hinged ventilated facades type "wet" facades.
  • walls of sandwich panels and made using a layered masonry.
  • cabins on ships and other ship design.
  • pipelines of different types, the surface temperature of which may range from minus 120 degrees Celsius to 1000 degrees Celsius plus.
  • also basaltic material success is a barrier to fire, well protected from fire ventilation ducts and building structures.

Note that very well use hard mats of mineral insulation where there are sufficiently large loads.They may be mounting, and performance.If you need to insulate ventilated facade, it is best to take the basalt wool, consisting of two layers.Each layer has a different density and a loose layer is located inside from the side walls.A second layer having a dense structure, to be outside by ventilation.

When building a country cottage, having a small number of floors, the best choice may also be made of basalt heat insulator.It is good for thermal insulation of any structural elements, roofs, floors, facades, walls and partitions.And where there is very wet (in the baths and saunas) basalt wool - a real salvation.Especially considering the ratio of excellent technical characteristics as the insulation basalt wool, its excellent quality and reasonable price.About

cons basalt insulation

1. all seemingly good the material.He is durable and heat saves superbly, and background noise in the house does not allow it.But he has disadvantages, though a bit of them.To begin with mention of a high enough price.Unfortunately, not everyone can afford this wonderful natural insulation from basalt fibers.

2. presence of seams in places where it joins the individual elements of insulation, the insulating layer does not sufficiently tight.

3. Despite the fact that basalt fibers are soft and do not inject hands during installation they may break away from tiny pieces.As a result of the insulator rises pillar basalt minutest dust.And inhale this dust nobody smiles - health promotion is definitely not contribute.Put to work with insulation respirator - and everything will be fine.And to eliminate dust the finished surface of basalt wool coated with a waterproofing membrane.

4. Because of the ability to pass a good pair, use the heater in some cases not appropriate and should be replaced with the same polystyrene.For example, if insulation basement or foundation of the house.

Video: Features of basalt insulation

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