How to calculate the amount of concrete on the foundation

In this article we will talk about how to calculate the concrete on the foundation. The topic is of particular interest, since the projects used in individual construction do not always contain information on the amount of necessary materials.

Moreover, various modifications of these structures are laid everywhere. Consequently, a different amount of building materials is necessary, which also needs to be taken into account when calculating. So, how to calculate the amount of concrete for the foundation in affordable ways?

Features of the calculation of mortar when laying the grounds

Before you begin construction work, you need to have a general idea of ​​how much building materials are required. Such information will allow to determine the cost estimate.

Since the construction of most homes begins with the laying of the base, first of all, you need to decide on the volume of concrete needed to cast these structures. A feature of this calculation is that the cement-containing solution is not measured in tons, but in cubic meters. Therefore, we have to calculate the amount of concrete on the foundation, and not its mass.

When calculating the amount of mortar will need to consider a number of source data, among which we note:

• type of base (belt, slab, columnar);
• configuration;

The type and configuration of the submerged structures are selected in accordance with the bearing capacity of the soil and on the basis of the exerted mechanical load.

What you need to know when counting

To correctly determine the amount of concrete, the following parameters are required:

• For the slab base, you need to know the thickness and area of ​​the future structure.. Also require information about the presence of stiffeners and their dimensions.
• For a tape base, you need information about the depth of the foundation, the width of the tape and the total length of the structure. (the perimeter of the bearing walls and the total length of the inner lintels).
• For the column foundation, information is needed on the height of the columns, as well as their diameter and number..

Determine the volume of the solution for pouring slab base

To solve our problem, you can use the calculator of concrete consumption on the foundation, but we will try to cope with a simple calculation in another way.

The slab-type construction is a solid monolithic slab directly on which the house is built. To know the amount of materials in this case is easy, it is enough to calculate the volume of the base, and for this you have to multiply the thickness of the plate by its area.

For example, consider the order of calculations for a typical country house with standard sizes 6 * 6 m:

• Multiply the size, we get 36 m? - is the area of ​​the plate.
• The thickness of the base, regardless of the soil can not be less than 10 cm, therefore, with the minimum thickness, the volume of the solution is: 0.1 m multiplied by 36 m? and we get - 3.6 m ?.

If a slab of 20 cm thick is to be laid, then the volume will be 7.2 m ?. Accordingly, if the plate thickness is 30 cm, then the volume will be equal to 10.8 m ?.

To give the structure high rigidity, the plates are laid with special ribs, directed longitudinally or transversely. The presence of these elements allows the base to provide greater resistance to mechanical stress.

For ease of construction work, such structural elements are located on the lower surface of the concrete foundation, while the upper plane remains smooth and suitable for walling. If the ribs are located on two planes, during construction it may be necessary to cut the reinforced concrete with diamond circles.

Calculate the amount of solution for pouring these structural elements is possible, knowing the area of ​​their cross section and total length:

• As a rule, stiffening ribs are usually made at three-meter intervals. In our case, the foundation has sides of 6 and 6 meters. So, there will be three edges along and the same across. To make it clearer - the edges will be located at the edges of the plate and in the middle.
• The length of the edge will be 6 m, which means that the total length will be equal to 36 meters (6 m * 6 edges). In height, each stiffener is usually the same as the thickness of the slab. Edge width is 0.8-1 of the height.
• The shape of the cross-section of the rib is a rectangle, less commonly a trapezoid. As a result, the area of ​​a rectangular section of a stiffener plate with a thickness of 10 cm will be 0.08 m * 0.1 m = 0.008 m ?. We consider volume as follows: 36 m * 0.008 m? = 0.288 m?

Determine the amount of mortar for pouring column foundation

Instructions for calculating the amount of materials for pouring the columnar foundation are simple, but you need to know the cross-sectional area and the height of the concrete columns. Calculate the cross-sectional area of ​​a round column can be the formula S = R? * 3.14. R here is the radius of the cross section.

Important: The height of the pillar is individual for each project, and therefore to calculate the volume that you need, you will have to be guided by the data given in the project documentation.

Determine the volume of the solution for pouring the strip foundation

To determine the volume of concrete and find out what the price of materials, in this case, you need to know the height, width and total length of the tape.

The width of such a base is usually made to the width of a wall block or brick and is 20–40 cm. The height of the tape is considered to be the sum of the size of the above-ground part of the foundation and its recessed part. That is, the height is equal to the total depth of the hole, if diamond drilling of holes in the concrete was carried out.

In domestic climatic conditions, the base is laid below the depth of frost penetration, therefore, the total height of the tape is up to 1.9 meters.

Calculate the total length of the tape is also easy, just need to measure the perimeter of the future construction of the foundation and the length of the internal walls. The resulting data is multiplied and we obtain the amount that will need to fill with concrete.

Important: Having carried out a simple calculation, you will certainly get accurate data that you can use when buying ready-made concrete or when making your own hands. But, anyway, it is necessary to have 5-10% more material than the calculations showed.

Conclusion

Now it is not necessary to look for a special calculator - how did you find out how to calculate concrete for the foundation from the article and you can do the counting yourself. Using simple mathematical formulas, you calculate the amount of the required material and you can make an accurate estimate. You will find more useful and informative information by watching the video in this article.