Any building cannot do without a foundation. In this article, you will find out how much concrete is needed for a foundation using a mathematical formula. The construction of any building requires preliminary construction of the foundation. The developer has two options for preparing a concrete mixture for these purposes - to mix it with his own efforts or to purchase it ready-made. But regardless of the type of solution chosen, it will be necessary to calculate how much of it will be needed. This is quite simple to do.
The volume of mortar for various categories of foundations
For an accurate calculation, you need to take into account the configuration of the foundation.
Formula for calculating the amount of concrete Strip foundation - continuous tape at the base of the walls. It is laid under the load-bearing walls of the building; it distributes the weight of the building along its perimeter. Thanks to this, the foundation resists the buckling of the soil, preventing the building from skewing. They are erected on such a foundation, both wooden and monolithic houses. The advantage over slab foundations is significant savings on cement. Depending on the bearing capacity of the soil, the strip foundation is erected deep and shallow. The base allows the owners to build a basement and basement. The required amount of solution is calculated by the formula: V = 2ab? (c + d), where
a is the width of the tape, b is its height, c is the length of the outer side, d is the inner.
Tiled foundation
is a solid slab underneath the entire building. This type is considered the most reliable. Particular preference for this type is given in areas with problem soil. Thanks to the construction technology, the slab foundation distributes the soil pressure during freezing throughout its entire area. When the soil swells, the base rises slightly and returns to its place, due to the large weight. On this basis, most often wooden houses are built, since they have insufficient weight to serve for a long time on a strip foundation. The volume of the solution is calculated by the formula: V = xcb, where
x is the length of one side, c is the other, b is the height. Column foundation is a series of supports. They are installed at the corners of the future structure, in places where the walls intersect, as well as in places of the greatest load (load-bearing beams, frame crowns, etc.). Such a base is suitable for lightweight structures. It is especially popular for the construction of log cabins. The biggest advantage is economy, of the minuses is the impossibility of building a basement. The volume of the required solution is calculated by the following formula: V = (3, 14? D2 / 4) x h, where
h is the height of the support, d is its diameter.
An example of calculating the amount of concrete for a foundation
1. Strip foundation
Let's consider how to calculate the volume of the required solution for a strip base using an illustrative example. Let's say you are going to build a foundation with dimensions 6? 9 meters. 2 meters high and 0.28 meters wide. Let's use the above formula.
nine ? 0.28? 2 + (6 - 0.28? 2)? 0.28? 3 = 5.04 + 4.56 = 9.6 (m2).
As a result, the volume of the solution for such a foundation will be equal to:
9, 6 ? 2 = 19.2 m3.
2. Tiled foundation
Let's calculate the amount of concrete required for the slab foundation. If you are going to build a base measuring 7 × 9 meters, 0.3 meters thick, it is still easier than in the previous case. Multiply all three values 7? nine ? 0.3 = 18.9 m3.
In this case, you should not take into account the correction for the reinforcement, since the value of its volume is insignificant.
3. Column foundation
Columnar base for construction requires a little big calculations. First, the volume of the foundation is calculated, which falls on one pile. After that, the resulting value is multiplied by the total number of supports.
Let's look at an illustrative example:
- Pole support diameter - 0.3 meters;
- Support height - 1, 4 meters;
- The total number of supports is 13 pieces.
- Using the formula, we calculate the volume of the solution: 3, 14? 0, 3? 0.3 / 4 = 0.07 m3.
- The total amount of required material will be equal to 0, 07? 13 = 0.92 m3.
Following from this, we can conclude that for the construction of a columnar foundation, minimal costs of concrete mortar will be required. And accordingly, the cost of cement will also be minimal in comparison with other types of foundations. But it will be necessary to incur the costs associated with attracting additional equipment for drilling the earth under the pillars.
