Want warm floors - add pearlitic sand
In the domestic construction market, materials with perlite are often found, but, for the most part, in a molded form. Meanwhile, abroad, perlitic sand is added to various dressing compositions, including plasters. Such a filler gives building compounds new properties, reinforcing already existing characteristics. So, with the help of perlite it is possible to obtain heat-insulating, acoustic compositions, fire-resistant coatings, light mortars.
The floor is very effective on the basis of perlite. To install it, hydrophobized perlite is used, the fractions of which do not exceed 6 millimeters. After laying the pipelines on the prepared surface, the sand is poured from the bags and leveled with long rails, with the layer thickness being 20% higher than the desired height of the coating.
If necessary, under the sand, drain pipes with a layer of kraft paper above them are concealed( in case if the base does not use overlapping above the basement).Over the backfilling are laid slabs, for example, from aerated concrete, then the floor is poured. For wooden flooring, the plate seal is not used, the perlite simply fills all the voids between the lags.
Practical in all respects sand pearlitic expanded
Perhaps, even earlier should mention such property of perlite as incombustibility. And this is not surprising, given how the sand is made pearlitic. It is made of volcanic glass, by high-temperature( over 1000 degrees) roasting, like a basalt tile, which has a similar origin.
Refractory bricks based on perlite are used for lining, that is for facing blast furnaces in the metallurgical industry. It is the remarkable fireproof properties of perlite that make it possible to obtain excellent heat-resistant construction mixtures with it.
Perlite filler in plaster solution allows to reduce its thermal conductivity by 50%, while 3 cm of the obtained finishing material for thermal insulation properties will correspond to 15 centimeters of brick.
Perlite can be used as a heater not only in thermal insulation products, but also in bulk, in bulk. The best option is to fill in the cavity between the bearing wall and the cladding laid with an indentation of 3-4 centimeters. Filling of the cavity is carried out through every 4 layers of bricks, with perlite piled up layer by layer, followed by a light tamping, which should lead to shrinkage by 10%.Pour perlite directly from bags or with a sandblaster.
Building solutions with perlite base
The reliability of the building masonry is the guarantee of the strength of the future construction, it does not matter if it is a sound country house or residential apartment complex within the metropolis. And just perlit is able to provide this reliability. The composition is easy, which positively affects the overall massiveness of the building. It is best to use mortars based on perlite when laying blocks of foam concrete or other types of light brick, since these building materials are the closest in their characteristics to the solution.
With this combination of brick and mortar, the possibility of cold bridges will be completely eliminated. Properly manufactured mortar after hardening has the following characteristics: density - about 650 kg / m3, tensile strength - over 1.7 N / m2, resistance to compression - over 5 N / m2, thermal insulation properties - an average of 0.2 W /(m * K).
By the way, here is one of the variants of such a solution: cement 1 part, perlite 3 parts, sand 2.2 parts, water 1.5 parts, plasticizer( if necessary) 3 parts .As for the dry warming backfill, its thermal conductivity corresponds to 0.04-0.05 W /( m * K).Expanded perlite, like other products of volcanic activity( such as tuff), both in solution and in the loose state, does not completely age and does not lose its properties, is not damaged by rodents, insects or fungus.