Paul Chernyakov Relentless statistics show that the choice of project cottage majority of customers are still focused on the brick. Recently, however, have a good old brick appeared very serious competitor. Name - cellular concrete. And no wonder. The advantages of this material has already been highly appreciated by both designers and homeowners. On the classification of cellular concrete Much has been written. In every second trade publication dedicated to the construction market, we can find the distinctive characteristics of the brightest representatives of the cellular Brotherhood: aerated concrete (also known as autoclaved aerated concrete) gazosilikatobetona (gas silicate) slantsezolnogo aerated concrete, concrete, etc. However, the features of design and construction of such houses know not everyone. The thing is magic bubbles main advantage of houses with walls made of aerated concrete (many builders they have dubbed "stone") - is a comfort. Terms of comfort - warm and healthy climate - due to the very technology of manufacturing artificial stone: the liquid concrete mass foams and solidify, gets chicken wire structure formed by a set of air bubbles. The material is light, warm and durable. It protects the interior from overheating in summer and heat loss in winter. In addition, he is almost perfect "sound absorber, so that there is no reason stud wall plug even the most ardent supporters of silence. Heat insulating cellular concrete feature low volume weight (less than 1000 kg/m3), low coefficient of thermal conductivity and relatively high strength. Thus, the strength of artificial stone density of 450-600 kg/m3 enough to build frameless buildings up to three storeys. The thickness of the walls will not exceed 0.6 m. Due to the fact that the stone blocks are placed not on the cement-sand mortar, but on a special adhesive, the thickness of the seams between the blocks is only 2-3 mm. In contrast to the brick (which is being built, usually with just a cement-sand mortar), the wall of the blocks has no thermal bridges, which further keeps the house up to 30% of the heat. In addition, the walls of cellular concrete, unlike brick, it is easy Stroebe channels for distribution of electrical wiring, plumbing and heating pipes. Subject to construction technologies with disabilities "stone" houses will face except on the stage of the delivery of cellular concrete and construction - is still fragile and he is afraid of water. However, according to experienced superintendents, even the low qualification of the contractor can not "lay a mine" under such a house - is so unrealistic to make a mistake that could lead to loss of performance properties of the building. Perhaps the only disadvantage of this material at home - his inability to finish after summing up the wall under the roof. This is due to the fact that porous concrete, it dries, shrinks, and start to finish only after the end of shrinkage. Aerated concrete - a material light, warm and durable. It protects the interior from overheating in summer and heat loss in winter. In addition, he is almost perfect "sound absorber, so that there is no reason stud wall plug even the most ardent supporters of silence. By the way, little-known fact that the houses made of cellular concrete can be a long time to leave without a major exterior. It is calculated that they can stand in this form up to 80 years. So the choice of projects porous homes is particularly beneficial to those developers who plan to "smash" the construction and decoration of the house for a few seasons. But despite the encouraging results of the tests are too long to leave the house without the exterior, of course, is not worth it. When plastering the walls of cellular concrete requires mandatory coverage plaster hydrophobic compounds, if not provided external facing brick. Using facing bricks, you can not put it close to the main wall, or live in the house will be impossible. Indeed, apart from external influences Wall experience and influence the microclimate inside the building. A wall made of cellular concrete, as no other absorbs water vapor in the air space, and due to the temperature difference from inside and outside the walls of the canalizes "them out (the intensity of this process is that, in some cases it can damage the plaster on the outside side of the wall). The ventilated space between the wall and facing brick can take a couple of masonry, thus preventing condensation of moisture remaining "dry", the wall will be "warm." Untie the hands of the architect of cellular concrete blocks you can build any configuration of the building, which opens up great opportunities to architects and designers. Focusing on this material, the customer gets the opportunity to realize their wildest fantasies concerning the future shape of the house (unless, of course, we are not talking about a skyscraper in the style of Sir Foster). Porous concrete blocks are large, thus saving both labor costs and the binder solution. Typically, cellular concrete plant manufactures the full kit for your home. Smaller building blocks, tiles to walls, exterior and interior wall panels, slabs and floors are made of cutting technology (as opposed to molding, in which manufactured bricks and blocks of conventional concrete) than the high accuracy of their size. Producers are out that deviations from the specified length, width and height ranging from 1.5 to 3 mm. This is particularly useful in the construction of houses for individual projects: the architect can independently calculate the optimal size of blocks that will bring the plant in the package - will only competently collect them. The speed of gas-concrete construction can be compared with the construction of prefabricated cottages made of wood. To have a clear idea about the characteristics of cellular concrete and the manufacturer, before buying be sure to read the document about product quality, which indicates the strength grade of concrete and actual humidity. The latter figure is very important. According to the requirements of standards, moisture (by weight) of cellular concrete with delivery to the consumer should not exceed 25% of concrete on the basis of sand and 35% - for concrete made on the ash and other industrial wastes. Home of the cellular concrete may be left without a major exterior. So the choice of projects porous homes is particularly beneficial to those developers who plan to "smash" the construction and decoration of the house for a few seasons. But for far too long to leave the house without the exterior, of course, is not worth it. Let us dwell on another feature of design and construction related to the physical properties of porous concrete. Remember, this is a very lightweight material, its density ranges from 400 to 700 kg/m3. And hence, the wall of the house from him, too, would be relatively easy. Therefore, the foundation under a house made of cellular concrete may not be as solid and heavy as a brick. This, in turn, means that the material and labor costs during construction will be significantly lower (which agree, is important). And from the outside and inside Whichever house you may have built - a large (for permanent residence) or small (cottage), easier and safer to produce the internal partitions of the same cellular concrete. What would a modern design partitions you may decide to apply in their home (for example, partitions of metal profiles and gypsum or gypsum boards), you still have to create some kind of "sandwich" system using a heater to achieve satisfactory noise reduction. And any "sandwich" system is much more laborious than the masonry blocks. Yes, and it will cost a bit more expensive. Of cellular concrete in the house are made not only partitions, but also overlap and even stairs. Partitions are excellent soundproofing for the rooms, the overlap is, in addition to reducing the weight of the whole structure, are also an additional guarantee of preserving the integrity of the building during a fire. Thermal resistance of porous concrete is three times higher than that of clay bricks, and eight times higher than that of heavy concrete. The outer wall of the blocks 375 mm thick provides the required regulatory thermal resistance Rt = 2,5. Thus, the use of cellular concrete reinforced with iron plate resists fire two to three times longer monolithic or honeycombed concrete, because the low thermal conductivity of the material does not allow the fire to destroy its deeper layers. Even with the strong fire of cellular concrete does not burn, unlike wood, and does not lose the mechanical strength, in contrast to the brick. For the manufacture of interior partitions are quite suitable blocks 100 mm thick with a density of 500 g / sq. m. The wall is obtained by a solid, noise-and heat-insulated, and at the same time easy enough. Such partitioning can be successfully installed in summer houses with wooden floors (of course, provided that the midspan of the beam overlap have additional support). High accuracy of the block size eliminates the need for plastering the rooms inside. On aerated well bonded ceramic tile, wallpaper, finishing can be applied cement-sand plaster, water emulsion and acrylic paints, "coat". By the way, if the owner of the house, like a real man, decides to drive a nail into the wall, more appreciative of the material it finds: porous concrete totally crumbles. It must be noted that one of the already mentioned advantages of foamed concrete may be the real secret weapon with which the material is ready to give a decisive battle brick. After the snip 23-79 "Construction of Thermal Engineering, which is about three times increased rate of thermal protection of the building, cellular concrete was virtually the only material that allows to make single-layered walls of houses, that is manufactured only from the same material, without the use of structures in which carriers are interspersed with layers of effective insulation. Recall that for a private two-or three-storey house gas concrete wall thickness of less than 600 mm fully satisfies the thermo-technical standards. And when using bricks without heaters wall thickness in the same house for new snip exceed 1.5 m. It goes without saying - it is simply unacceptable. So that formally in a battle with "honeycomb brotherhood" classic brick loses. And if the first time after the new snip cellular concrete remained in the rear because of the lack of sufficient number of domestic manufacturers, today this problem is successfully solved. Let's see what happens.
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