Foam concrete – reliable modern material used in housing construction for quite a long time. It is easy and durable, mounted very quickly. But it is important to assess the severity of structures not to buy inappropriate blocks.
The most demanded enabarity of foam blocks – 600x300x200. It is useful to build internal bearing walls. Build the same bearing walls, but already outside, it is required from the designs of 600x400x200. Partitions, separating rooms, must be made from blocks of 600x300x100 mm, but only when the slightest load is excluded. Products with dimensions 600x250x100 allow you to increase the height of residential buildings, measured in the floors, without additional strengthening of the foundation.
Still foam blocks 100x250x600 need to:
- reconstruct old houses;
- lay out interroom and bearing walls;
- take overlaps between floors;
- Create cameras for freezing and thermal processing products.
Block elements 600x250x75 are also suitable for the formation of interroom partitions. Returning to the products 100x300x600, it should be noted that they have an optimal balance between strength, weight and heat saving.
You can also order (indicating the number of pieces) foam concrete formats:
What is affected by weight?
Weight, or rather, the density of foam concrete, directly affects its market value. The easier the material, the cheaper it is for sale. In addition, shipping costs directly depend on the severity. Some blocks can be lifted and mounted manually, and others can not be put in place without the use of equipment. Naturally all this is reflected in the timing and cost of work, on the overall labor intensity of construction manipulations.
But there is another extremely important circumstance. Differences in foam concrete density define its use. So, groups of groups 300, 400 and 500 are suitable only for thermal insulation. Even the most insignificant load is poorly reflected on them. D600-D900 format combines structural and thermal insulation characteristics.
Such elements will withstand a certain mechanical impact and keep warm. It is them that they are recommended to apply to build a house in 1-2 floors. For the middle strip of Russia, such blocks are suitable without auxiliary insulating layer. Foam block D1000-D2100 refers to the construction group. All such elements are in demand mainly in the construction of apartment buildings, necessarily need enhanced thermal protection.
There is another circumstance. Part of the manufacturers for the sake of price reduction violates the standard recipe. In the composition of foam concrete add and crushed stone fraction, and the crushed brick. As a result, the thermal characteristic of the material is deteriorating, its strength suffers. But no masking in appearance will not allow you to mislead the buyer if it knows exactly what the mass of the standard block should be.
High-quality foam block – subspecies of cellular concrete. Its structure should be porous formed by air fragments distributed uniformly. The technological process is organized by the babullure technique.
The flawless product should include:
- Sand (river, well washed, or extracted from a career);
- foam formation substance;
- Cement M400 or higher brand;
- Pure technical water.
It is necessary that the dry composition of sand and cement is prepared first. Then it is mixed with water in an exact proportion. And only last time add components forming foam. On the regulatory density can be judged, much is in the air pore material. And also this indicator says what the relative shares of sand and cement mass.
How to calculate?
The normative share of 1 m3 foam concrete can be determined by the category to which it refers. So, if the material is classified as D400, weight 1 cube. M. will be 436 kg. For the most mass category D600, the scatter will be from 450 to 900 kg. Foam concrete group D1000 should weigh an average of 1,100 kg. But all these numbers are achieved only with the strict implementation of the current standards.
In reality, even when the standards are running strictly, there is quite a large variation of values. Calculate the weight of one foam concrete block helps special measuring instruments. But not on every construction site they are. And therefore it is necessary to repel first of the density category.
This density is determined by how much 1 cube. M. You have to:
Calculation of the volume weight of the foam block cuba in kg in the first approximation is carried out simply by density (with this humidity deliberately neglected). The essence is simple – multiplication of volume on density. But in practice, the humidity is much more important than it seems. As water absorves, the total mass of the block grows noticeably, sometimes 1/5. The volume itself is predictably calculated by multiplying the length of height and width.
Let you need to know how much the D600 conditional density unit weighs, the dimensions of which are 600x200x300. The total volume of such a design is 0.036 cubic meters. M. As follows from the marking, 1 m3 of foam concrete has a lot of 0.6 tons. Therefore, the burden of the block will be 21 kg 600 g. But there is another nuance.
Per 1 cubic. M. volume accounts 27.8 pcs. Foam blocks with dimensions 20x30x60 cm. If you take the blocks of 10x30x60 cm, in the same volume it will be placed a little more than 55 products. Knowing a lot of 1 products, you can calculate, what will be the severity of the pallet or pallet loaded by foam concrete. The problem is that all these calculations do not take into account the sorption humidity. And here the provisions of GOST 25485-89 come to the rescue. According to them, in foam concrete, the level of sorption humidity can reach 8-15% (when creating material based on sand).
If the ash is used as a filler, the foam material can be used additional 12-22% of water. The exact indicator is determined by its initial humidity. Let the sorption moisture correspond to the smallest indicator (8%). In this case, for a product of 600x200x300 mm, it will give an additive by weight in 1728 g. Conclusion: The total mass of the foam block will be at least less than 23,328 kg.
If you proceed from the maximum possible level of sorption moisture, the total mass will reach 26.352 kg. In order not to calculate independently, you need to seek advice from the manufacturer. At the same time, it is still close to study all official certificates. After all, the newest industrial technologies and differences in the humidity level can strongly affect the final result. Mass of blocks 600x300x200 mm more than a brick.
But due to the reduced density and reduction of the amount of cement for masonry, the general pressure on the foundation decreases. It is equally important for the wall and partition block. But the scope of application significantly affects the weight characteristics of foam blocks. So, the heat-insulating structures of the D300-D500 have a mass of 12-19 kg. And the design elements of the D600-D900 have the smallest gravity 23, the largest 36 kg.
The most severe construction details of the dimension 600x300x200 weigh 40-47 kg. The average mass of the partition product is 21 kg. It should be borne in mind that according to Russian GOST it is categorically unacceptable to produce foam blocks longer than 0.6 m. The heat insulating foam block of the wall performance has a mass of 11.6-19.5 kg. If we consider the variant of the festation heat insulation product with a value of 10x30x60 cm, its mass is recordedly small – only 5.8 to 9.7 kg.
Let’s see another option for calculating. Let there be a foam concrete element category D400 dimensions of 20x30x60 cm. His cumulative volume is exactly 0.036 cubic meters. M. Accordingly, the mass of concrete structure will be 14.4 kg. This is, of course, again “dry mass”. Introducing the correction on the water absorbed, you can get more objective numbers – 15.55 and 16.6 kg.
You need to enter the water correction and in relation to the most severe porous concrete. For categories D1000-D1200 Dry mass is 47 kg. When saturated with liquid from the air, it grows up to 50 kg. It seems to be a bit, but if you need to transport dozens of blocks, even for a truck, the difference is no longer indifferent.
IMPORTANT. The so-called reinforced foam blocks that seemed to correspond to higher categories of strength than the mass, in fact, only an advertising trick.
On how to calculate the weight of the foam block, look in the following video.