Alexey Shamborsky, 06/28/2015
The foundation is the foundation of the house, on which the durability, reliability and safety of the structure depend. Therefore, before starting its pouring, it is necessary to conduct a study of the soil land plot. The choice of the type of foundation and the preparation of a cost estimate for its laying depend on the composition and indicators of the soil. The online calculator for calculating the foundation will allow you to correctly design the foundation of the house from an engineering and technical point of view.
How to calculate the foundation yourself?
In order to determine the required volume of concrete (V) for the foundation of the house, a special formula is used, which involves the multiplication of the following design indicators:
- P - foundation perimeter;
- H - foundation heights (underground and aboveground parts);
- B - the width of the foundation.
When calculating the proportion concrete mix, it is necessary to take into account the brand of cement, the fractionation of sand and crushed stone, as well as the degree of their density. The calculator for calculating concrete for a foundation for a house will give the required volume of concrete in cubic meters. It also provides for online calculation of materials (rebar, cement, sand, crushed stone, formwork boards) for the foundation. At the same time, the amount of required reinforcement is indicated in meters, sand and crushed stone in tons.
Calculation of the strip foundation
Tape base - the most popular view foundation, which is explained by its technical specifications and economic benefit.
Effective design of the base will allow you to properly distribute external loads along its perimeter, which is an important step in the subsequent construction work. Handwritten calculation of the foundation has a high probability of making mistakes, which, over the years of operation of the house, are fraught with the destruction of the structure. A specially designed strip foundation calculation calculator takes into account the engineering subtleties of its device.
The result of specifying the requested parameters in the corresponding input fields implies obtaining data regarding:
- foundation reinforcement;
- formwork material;
- volume of concrete, cement, sand and gravel.
Convenient and simple online calculator is designed to significantly simplify the process of calculating the strip foundation.
Comments:
- Initial data for calculation
Performing concrete calculation on strip foundation is one of the most important stages of preparation for the arrangement of the foundation in question. There are many special services that allow you to perform the necessary manipulations in automatic mode, setting only the required initial data. However, it is best to calculate the material for arranging the tape yourself. This will avoid errors, especially since no complex formulas and hard-to-reach data are used for such calculations.
Strip foundation - a continuous concrete strip located under the walls of the house.
Basic information about strip foundations
The tape base is a continuous concrete tape, equipped under the walls of the building. Tapes are arranged under bearing walls and internal partitions. Thanks to such concrete elements, a uniform distribution of the weight of the structure along the entire perimeter is ensured.
With proper arrangement, the concrete system will be able to normally withstand seasonal changes in the state of the soil, preventing the erected building from skewing.
In order for the finished structure to be truly reliable, of high quality and durable, it is necessary to properly prepare for its arrangement, first of all, by calculating the amount of concrete.
For this, the simplest formula is used, according to which the required amount of concrete is determined as the double product of the width of the tape and its height, multiplied by the sum of the lengths of the inner and outer sides of the structure.
Below is an example of a calculation.
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Initial data for calculation
The required amount of concrete is determined in cubic meters, so the main task of the calculation is to establish the volume of the tape structure.
The following values are used as initial data:
- base type;
- features of the base configuration;
- tape thickness;
- tape area;
- the presence and dimensions of stiffeners;
- depth of the support system;
- tape width;
- total length of the support structure.
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An example of concrete calculation for a strip foundation
To establish required amount concrete solution, first of all, determine the width of the structure to be equipped, its total length and final height.
Specify all required dimensions in mm
H- Height.
A-Thickness.
X- Width.
Y- Length.
C- The distance between the axes of the jumper.
S- Step between reinforcing joints.
G- Horizontal lines.
V- Vertical rods.
Z- Connecting fittings.
The required amount of cement for 1 m³ of concrete mortar will be different, in each case.
These parameters will depend on the proportions and fractions of the fillers, the brand of cement used (which are indicated on the bags) and the brand of concrete desired.
Planning the foundation of a house is an important and responsible process that requires an accurate calculation of materials for its construction. As a rule, the total price of a monolithic structure for a building can be a third of the total price of a house.
Our service allows you to greatly simplify the calculation and plan a monolithic foundation for future construction. You will be able to calculate the amount of concrete mortar, formwork boards, reinforcement that will be required to fill the tape monolith.
What will you learn:
- The area of \u200b\u200bthe base for the future home (this is useful for calculating the amount of waterproofing and thermal insulation);
- The number of floor slabs and concrete mortar for the foundation;
- The number of reinforcement, depending on its diameter, length and weight, which are involved in the calculation;
- The total area of \u200b\u200bthe structure and side surfaces (for calculating the waterproofing of the monolith);
- The number of building materials in pieces and the area of \u200b\u200bformwork and cubic meters;
- Calculation of the approximate price of building materials (for each individual project);
- Drawing of the future foundation.
This service will be useful for those who design and pour a monolithic foundation for the house.
Composition of concrete
The cost of these materials is indicated additionally, depending on the region of the country and the season.
It is worth considering that the composition of the finished concrete depends directly on the brand of cement, in what conditions it was stored and its “freshness”, the size of the crushed stone and gravel fractions. With increased humidity, cement bags turn into a monolith and lose their properties.
The price of crushed stone and sand must be indicated for 1 ton in the calculator. While the supplier names the price of materials for 1m³.
From the place of origin of the sand will directly depend on its specific gravity. 1 m³ of river sand weighs an average of 1500 kg, which is heavier than quarry sand.
It is a little more difficult with crushed stone or gravel, since 1 m³ can vary greatly depending on the size of the fractions from 1200 to 2500 kg.
You can check these parameters with the suppliers of bulk materials, as well as their cost.
An online calculator will help you find out the approximate price of materials for a future home base. It is also necessary to take into account self-tapping screws and nails, fittings, delivery of building materials, waste for construction and earthworks.
Foundation pouring process
It is necessary to plan the site before starting pouring work, dig a pit or trenches and install formwork. For the best work, all purchase factory concrete, as this will allow you to evenly fill the entire area of \u200b\u200byour structure in one go. In the event that you intend to manually make a strip foundation with your own hands, then it should be noted that it is best to fill the monolithic base in one day. Since otherwise, "cold seams" will form, which will cause the destruction of the monolith. If, nevertheless, you ordered a factory concrete truck, then make sure that access is provided for it to pour concrete from any angle.
Step by step process:
- Pour the concrete solution in layers of 20 cm;
- We tamp each layer with wooden rammers, removing all voids in the monolith;
- We tap each wall of the formwork with a hammer;
- Filling is performed according to the level of the fixed mark;
- After that, with a trowel, you need to carefully plan the surface of the concrete, while for checking with reinforcement we pierce the monolith in different places to let the remaining air out. You can tap the formwork with a wooden mallet from the outside.
Now it remains to let the strip foundation stand for 30 days, after covering its surface with waterproof material and wetting it daily with water. When the concrete has hardened, you can remove the boards and move on to further work.
Regardless of whether you are engaged in construction yourself or involve hired workers, you just need to know how much material is required to perform a particular type of work, in particular, to build a foundation for a house. This will not only help to understand the justification for the costs of acquiring them, but also the need to use just such an amount.
The online calculator below is designed to calculate the amount of materials required to pour the foundation with concrete of a given grade. The calculation is carried out along the perimeter, the depth of the underground and the height of the above-ground part, as well as the width and brand of concrete.
To calculate, just fill in the fields and click "calculate". As a result, you will know not only the required amount of concrete (how many cubes of concrete are needed for the foundation), but also the exact weight of all constituent components (cement, sand, crushed stone).
The advantage of the calculator is that it allows you to additionally calculate the required amount of reinforcement and formwork boards (number of cubes with a thickness of 25 mm).
Please note that the basis for the calculation is cement grade M-400. This brand is most popular with developers. Calculation is available with the concrete grade M100, 150, 200, 250, 300. When the cement grade changes, the proportions of the concrete components will change.
Calculator for calculating the amount of concrete and reinforcement for a foundation for a house
Unfortunately, in mobile version site calculator does not work, for calculation go to the computer (full) version.
Properly executed design and estimate works are the basis of any construction. This factor makes it possible to avoid overspending of material, and, therefore, unnecessary costs. It also eliminates workflow downtime caused by missing required components. This fully applies to foundation work, since it is desirable to complete the pouring stage in one go.
Quite often, for certain reasons, private developers prefer to prepare concrete on their own. Of course, you need to calculate in advance the required volume of the mixture, which is done using a fairly simple arithmetic operation. But due to the difference in the types of foundation structure, the calculation formulas are also different. If there is a cooking practice , for example, for brickwork, then the process will go more fun.
Particularly lazy people can combine the calculation of cement for a foundation and a calculator, which is available online on specialized sites. It is possible to determine the amount of material in this way only approximately, which is not entirely acceptable for a small construction site.
Volume calculation formulas for certain types of foundation structures:
- Slab - it is enough to multiply the indicators of the area and height of the planned slab V \u003d S x H.
- Tape - the product of the total length of the structure and the cross-sectional area V \u003d S x L.
- Pile - determine the cross section of one support and multiply the result by the number of piles V \u003d S x H x N, if the pillars are cylindrical, then the cross section is calculated by the formula 3.14 x R².
Now you can directly proceed to the calculation of the volume of the cement mixture. It should be borne in mind that the recommended Portland cement is the M400 and M500 grades. Depending on the design marking of the finished concrete, certain masses of components are used for its preparation.
Below is a table of the W / C ratio (water / cement) in order to eventually obtain a certain brand of concrete solution.
If the hydraulic solution is planned without the use of crushed stone, then the W \ C coefficient should be reduced by 0.1. But this is not all the data, for example, the amount of water depends on the volume of sand and the size of the crushed stone fraction. The basic proportions of 1:3:5 or 1:4:4 (Portland cement: sand: crushed stone) do not take into account these factors, so the calculation of cement for the foundation will not be reliable. The required ratios are presented in the table:
Calculation example
Suppose we have the following material at our disposal:
- Crushed stone fraction 25 mm (ρ = 2700 kg / m³).
- The sand is fine-grained (ρ = 2500 kg/m³).
- Portland cement M400 (ρ = 3000 kg / m³).
The technology for further actions is as follows:
- According to table 1 of the values \u200b\u200bof water-cement (W / C), we find out that for the brand of mortar M300 (and we need such a mixture), the coefficient is 0.53.
- According to table 2 of water consumption, we determine that 195 liters of water (0.195 m³) will be needed for 1 m³ of solution, from here we calculate the required mass of Portland cement: 195 / 0.53 = 368 kg.
- Now we consider the volume of fillers (sand and crushed stone) per 1 m³ of the mixture: 1-((368/3000) + 0.195) = 0.682 m³ (682 l).
- Further, according to table 2, we determine the percentage of sand - 46% (0.46), from which it follows that its volume is: 682 × 0.46 = 313.7 l (0.314 m³).
- To find out the amount of crushed stone, you need to subtract the amount of sand from the total volume of fillers: 682-313.7 \u003d 368.3 l (0.368 m³).
- Taking into account the density and volumes of fillers, their weight can be calculated: sand - 0.314 × 2500 = 785 kg; crushed stone - 0.368 × 2700 \u003d 993.6 kg.
As a result, for the preparation of 1 cube of concrete mortar grade 300 from Portland cement M400, it is necessary:
- 195 liters of water;
- 368 kg of Portland cement;
- 785 kg of sand;
- 993.6 kg of crushed stone.
For a complete calculation, multiply the figures obtained by the number of cubes of solution required for work. As you can see, the procedure for counting components is not more difficult. so it will take a little time.
Why do you need a calculator for calculating the amount of cement for a foundation of any configuration
Modern technologies do not bypass the construction industry, thanks to which developers have at their disposal not only an effective tool, but also all kinds of software developments for design. With the help of the latter, you can make both a project and a calculation of the required amount of materials.
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A proven assistant in the preparation process has proven to be an online calculator for calculating cement and fillers for the manufacture of foundations of any type. The procedure is quite simple and accessible to any novice builder, it is enough to enter known indicators into certain columns:
- brand of Portland cement;
- base parameters;
- the number of reinforcing belts;
- required brand of concrete.
The results are announced almost instantly and are displayed in the form of cubic meters of material, linear meters of reinforcement, as well as the required amount of timber for formwork. It is important to take into account that with the increase in the grade of concrete, the volumes of components used also increase.
