How much cement in 1 cubic concrete - the proportions of the

As a rule, when beginning masters are confronted with a construction site, they are interested in how much cement is needed per 1 cube of concrete, sand and other ingredients? In different situations, the proportions may be different. Therefore, below we will look at how to prepare a concrete solution in certain cases.

General information

What proportions depend on

Before you figure out how much cement to 1 cubic concrete, you need to consider what is concrete and what functions it performs all its components. So, if you study the structure of this material, you can come to the conclusion that the main part of it is a filler - gravel or crushed stone, and sand.

Cement, in fact, is an adhesive that sticks a filler when interacting with water. From this it follows that an insufficient amount of it will lead to poor-quality gluing of the filler. Accordingly, such material will quickly collapse.

An excess of the binder component will not lead to anything good either, since the material will crack, due to the fact that the cement stone itself is very fragile. Therefore, the quality of the composition depends primarily on compliance with the proportions. All components need just enough to form strong bonds between the filler, no more, no less.

However, in some limits the proportions can still be adjusted, which allows to obtain a material of different strengths. Therefore, before proceeding to the calculations, how much cement is needed for a 1 cube of concrete, it is necessary to determine its compressive strength (brand).

For example, the foundation will require a brand of composition M300-350, while for the walls there will be enough M200. It should also be noted that the content of the binder largely depends on its brand. So, to obtain the composition of the brand M200, cement M400 will need much more than the M500.

Component Unit

It must be said that the builders calculate how much cement is needed per 1 cubic meter of concrete, as well as other components, not in kilograms, but in parts. This is very convenient, since such a measurement allows you to prepare any amount of solution, without calculating the ingredients.

For example, a ratio of 1: 3: 5 means that the preparation of the composition requires:

• Binder - one part;
• Sand - three parts;
• Large filler - five parts.

Of course, for the preparation of the mixture still need water, however, its amount is usually not indicated, since in different cases the composition may need a different consistency. Most often, the water content in the mixture is half a part.

Often you can find the designation of the amount of binder in the bags. For example, if 3 bags are indicated, this means that 150 kg of binder is required, since in a standard packaging one bag weighs 50 kg.

Proportions

The optimal proportion is 1: 3: 5. From this ratio, you can calculate how much cement goes to 1 cubic meter of concrete.

To do this, recall the school course of mathematics:

• In one cubic meter - 1,000,000 cu. cm.
• Since the mixture consists of nine parts, the binder will need - 1,000,000 / 9 = 111111 cm cubic.
• One cubic centimeter of binder weighs 3g, respectively, 33,333 g or 333 kg are needed per cube.
• Now you can calculate how many bags of cement in 1 cube of concrete - 333/50 = 6.6 bags.

Tip! To perform the most accurate calculations, you should familiarize yourself with SNiP 82-02-95, which indicate the norms of consumption of components for the preparation of different brands.

Below are the proportions of the components for different grades of composition:

From this table it follows that the higher the grade of the solution, the greater the amount of binder required for it. Accordingly, the cost of such compositions increases. Therefore, it makes no sense to use the most durable brand, where it is not required.

Note! For the preparation of high-quality material, you must use a pure filler, without any impurities. This applies to both sand and rubble. Therefore, before use, the filler is preferably rinsed.

Preparation of the solution

Having figured out how much cement per 1 cube of concrete, you can proceed to the preparation of the solution. It must be said that the quality of the material depends on this operation no less than on respect for proportions.

Instructions for the preparation of concrete solution is as follows:

• First of all, it is necessary to fill in the necessary amount of dry components in the concrete mixer.
• After the dry mixture is stirred, it is necessary to gradually pour water into it.. Often, at this stage, a plasticizer is added to the composition, which makes it possible to improve the characteristics of the material, as well as various additives, to give it certain properties.

• After some time, crushed stone or gravel pre-moistened with water is added to the concrete mixer..

Note! You should not try to make a mixture with your own hands, as it is very difficult to mix the mixture with rubble, therefore, it is unlikely that you will be able to achieve a quality result without a concrete mixer.

At this process the preparation of the solution is completed. It is necessary to produce the mixture obtained within two hours, as after this time the composition will start to set.

Conclusion

Compliance with the proportions is an important condition for the preparation of high-quality concrete solution. Therefore, before proceeding with this operation, it is necessary to carefully calculate how many components are needed, taking into account the brand of the future material.

In addition, it is important to qualitatively prepare the concrete mix, according to the scheme described above. From the video in this article, you can get more information on this topic.