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August 12, 2017 18:05

foam concrete

Foam concrete - a material widely used in construction because of its positive properties and acceptable cost.It has a number of differences from the classical concrete.The first is, of course, a different structure - namely, cellular, vesicular, porous - different terms apply.As concrete composition differs from that in the presence of a blowing agent.

Content

  1. Technical characteristics of foam concrete blocks
  2. Dimensions foam
  3. Disadvantages
  4. Benefits
  5. Video

Usually it LMS (resin wood-emulsified).It should be noted that the addition of resin following changes occur: reduced density (100 kg / m3), the sand fraction is reduced in the final product, etc. Of course, in some cases, these positive factors can manifest itself on the reverse side..Also, foaming additives are used;it turns out that the first part of the pores created by the foaming agent, the second - the additive.

strength of the foam may be different, depending on what kind of used material, which heat and humidit

y treatment regimen (TVO) has been selected.Cellular concrete, in turn, has the property to gain strength at once, but over a long period of time.We must pay tribute to the complex additives, as their use brings a number of positive factors, namely reduced shrinkage, improved frost and water resistance, increased density, reduced thermal conductivity.Consider further foam concrete blocks and their technical characteristics.

Technical characteristics of foam concrete blocks

building material structure does not affect its reliability: components can achieve the strength of the finished blocks.Products perfectly retain heat, so are suitable for economical construction of residential or commercial premises.Exclusion of harmful components allows you to get environmentally friendly products with a long service life.Other technical parameters of foam include:

  • water absorption: 14% in direct exposure to water;
  • density: from 300 to 1200 kg / m3;
  • conductivity: 0,1-0,38 W / m * K;
  • compressive strength: 2,0-7,5 MPa;
  • shrinkage of not more than 0.5 mm / m;
  • frost: about 35 cycles.

material has several varieties of brands, determining its special qualities and parameters.For example, D300-500 marks are thermal insulation (not suitable for construction).Stamps D600-1000 considered structurally thermal insulation and D1100-1200 are structural.Accordingly, their density will range from 300 to 1200 kg / m3.

Dimensions foam

Disadvantages Of course, first of all, is to identify the main shortcomings of the material.The porous structure reduces weight, saves material, but greatly reduces the strength.

In some cases, the material and is not recommended, especially in cases where the construction site can be subjected to the natural effects of shock or seismic type.In other words, such a structure during an earthquake is unlikely to hold out, in the best case, all limited to cracks, due to which, in some cases, the structure becomes unusable.

also can not use the foam in areas where there may be strong differences of temperature, pressure, humidity.In general - the building of foam durable, if the outside plaster is applied, or even any of the materials that protect the material from exposure to precipitation.As an example, see the article about the construction of the garage of the foam.

Benefits

advantages are many.Firstly, this high insulating properties (in comparison to ordinary concrete).As a result - the house warmer.Second, low water absorption, unlike aerated.Third, it takes much less than in the manufacture of cement - so low cost.Fourth, light weight foam concrete blocks reduces the cost of transportation, packing, etc. Fifth, work with the material data is very simple -. Easily sawed, hammered dowels, nails, etc. Sixth, completely harmless...

Video