Cement mortar for floor screed: proportions

The device of floor screed can be considered one of the most important tasks in the repair of premises.

Necessity of observing the proportion

It is during the preparation of the solution that a large number of errors are allowed. And most often they are connected not with the wrong preparation of the solution, but with the failure to comply with the necessary proportions of sand and cement, this is what leads to the result, which the master did not expect to see. It is worth remembering that the quality of the final coating depends on the ratio of the ingredients.

Composition mortar for screed

If you decide to prepare a mortar for floor screed, the proportion should be studied in advance. The mixture consists of sand, fiber, plasticizer, and cement. The first ingredient must be sieved before use, which allows removing debris, extraneous elements, small stones. Among other things, an exceptionally dry aggregate should be used. The most common for the work is used cement grade M400. The plasticizer is used, as a rule, by professionals. However, home masters should also pay attention to this component, which is able to improve the quality characteristics of the monolith. When you are preparing cement mortar for floor screeding, the proportions of the composition must be observed, as this is an important component. Fiber is often added. It is a polypropylene fiber. If you plan to make repairs some time later, it is recommended to abandon the advance purchase of cement. This is due to the fact that when stored, it loses its qualities. That's why experts advise to use only that cement, which was stored correctly and was manufactured recently.

The proportions of the solution

If you want to make a floor screed solution, the proportions should be studied in advance. It is from them, as well as from the brand of cement will depend on the final brand of concrete. Thus, in order to obtain a mixture of the M300 grade, one part of the M600 cement, as well as 3 parts of sand, must be added.

For M200 solution, one part of M600 cement and 4 parts of sand should be used. M300 will be obtained if you add one part of the cement M500 and 2 parts of sand. It is worth noting that to obtain all subsequent grades of concrete one part of cement of different grades is used. For M150, you should use cement M400, as well as 3 parts of sand. Before making a floor screed solution, the proportion of the master should be considered. It should be remembered that the floor can not be filled with a solution that has a mark below M50. The most frequently used for such works is M200.

Features of mixing

If you decide to prepare a floor screed solution, you can find out the proportions by reading this article. However, it is important to know how the ingredients are mixed. It should be noted that the dry and liquid components should be mixed in different containers. Initially, it is necessary to connect all dry components, including fiber, cement and sand. Use cement mortar grade M 400, mixing it with sand, with the use of a ratio of 1 to 3. Thus, for 50 kilograms of sand will be needed 16.7 kg of cement. Dry elements should be mixed for 5 minutes. Next, proceed to another tank, in which plasticizer and water are added. On a 50 kg bag of cement should be added about 190 grams of plasticizer. Water should be added in an amount of 1/3 of the cement mass.

A third of the cement bag will need to add 5.6 liters of water. When mixing mortar for floor screed (the proportion of each grade is indicated above), it should be noted that the plasticizer will have 0.6 liters. If you decide to prepare the floor screed yourself, the proportions for it are presented in this article. After the completion of all the above described actions, it is possible to start mixing the liquid components, for this, a dry mixture must be gradually added to the liquid container, while stirring it well. If you pour the liquid into a dry mixture, lumps will form, and getting rid of them afterwards will be very difficult.

Advice from a specialist

If you decide to prepare a floor screed solution for yourself, the proportion presented in the article will help you to carry out the process without errors. It should be remembered that it is very difficult to work on manual shutting, among other things, it takes a very long time for such manipulations. Therefore, it is recommended to use a construction mixer or drill, which is equipped with a special nozzle. You should remember that the use of power tools will make it possible to carry out these works in a much shorter time, and also more qualitatively. On this, we can assume that the preparation of the mixture is completed. It should be remembered that working with a viscous solution is much more difficult, but cracks on the base after hardening will be much less. Eliminate or minimize the number of cracks on the surface after hardening can be done in a way that involves spraying the floor with water during the drying phase.

Determination of the amount of mortar to form a screed

If you independently prepare a mortar for a rough floor screed, the proportions you need to study in advance. However, it is also important to calculate the amount of mortar for floor formation. Initially, it is necessary to determine the volume of the building material, for this, the area of the coating should be multiplied by the thickness of the proposed screed. For example, if the surface area of the floor is 40 square meters, while the thickness of the layer is equivalent to 5 centimeters, then 40 should be multiplied by 0.05. This will give you a figure of 2. That's how much cubic meter of solution is needed to form the floor in the room described.

But it is necessary to study, before preparing a mortar for floor screeding, the proportion of the composition. The next step is to calculate how much cement and sand will be needed. For the reason that the solution is made from the ratio of 1 to 3, it will be necessary to have 1.5 cubic meters of sand and 0.5 cubic meters of cement. The cubic meter of cement has a mass equal to 1,300 kilograms. This indicates that 650 kilograms of cement are needed for the job, this figure is calculated by multiplying 0.5 by 1.3. The above method makes it possible to calculate the consumption of a solution, which is used to form a floor screed of a certain area. The master will be able to prepare in advance all the necessary amount of building material.

Features of filling the screed

If you are thinking about how to make mortar for floor screed, the proportions you need to be well studied. Among other things, it is important to get acquainted with the technology of work. Initially, the surface is treated with a primer, then beacons are installed, the next step is the shutting and pouring. Priming is necessary in order to provide the base with excellent adhesion characteristics. This approach allows to normalize the structure of the roughing plate. If the surface has a porous base, then it is best to use a primer, whereas for a denser base it is necessary to use an undiluted compound.

Conclusion

If you are thinking about how to prepare a floor screed solution, the proportions were indicated above. They will allow you to do the work correctly. It is important not only to observe the ratio, but also to establish beacons. They will ensure evenness of the screed. The solution is prepared immediately before pouring.

For their installation it is necessary to prepare a gypsum mixture, which is placed on the base of the base by small tubercles. The mortar for the screed of the warm floor, the proportions of which were indicated above, should be prepared immediately before pouring. This will allow you to work slowly.