Cement slurry - correct proportions

The proportions for the preparation of cement slurry depend on what qualities the mortar should have.

Despite the possible variety, they usually use standard ratios prescribed in regulatory documents. So the most common proportion is one part cement to three parts sand. At the same time, do not forget that gravel or crushed stone is also added to such mixtures, and sometimes special additives that affect the technical characteristics.

Now let's look at what the ratio of sand and cement should be for different types of structures.

In this case, first of all, you need to focus on the expected load that will be on the floor. The requirements for the strength and stability of concrete will depend on it.

Most often, in such cases, cement M150-200 is used.

• If we use M500 Portland cement, then the proportion of cement to sand will be 1: 3. As a result, we will be able to get concrete M200.
• If we take cement with a lower grade, for example, PC400, then with the same ratio, concrete M150 will eventually come out.
• But if the ratio is 1: 2, then M200.

It can be concluded that the higher quality cement we use, the more sand can be added to the solution. The quality of the solution itself will not suffer from this. The main thing is not to forget that M500 cement retains its exceptional qualities for a very short time.

If the coating is made for non-residential premises, then it is better to make a stronger solution, since the load there will be more significant.

In this case, the ratio of cement and sand is from 1: 3 to 1: 6. The proportions are calculated depending on the brand of cement. In some cases, the sand can be replaced with lime mortar. Foundation

For the foundation, a 1: 3 ratio is also most often used. But in this case, crushed stone will also be present, therefore, in general, the proportion can be designated as 1: 3: 5.