The device of the screed with the level of the level, and then the thin layer alignment of the surface of the self-election mixture is a classic version of the leveling of the base levels. Unfortunately, this process takes a lot of time, but some materials are capable of making it more efficiently and faster.
Photo: Corkstyle
Photo: Unis. "UNISGRUCT" (UNIS) increases the crack resistance of the materials applied by the rials, increases the combustion strength of the solutions with the surface
With the advent of such floor coverings on the Russian market, as a laminate, parquet and engineering board, it became obvious that the surface aligned with ordinary cement screeds does not comply with modern requirements for the quality of the foundation in apartments and houses (2 mm on a plot of 2 m long) . Eliminate height differences and create a practically perfect plane helps a complex of materials: a rough levelover and thin layer bulk floor. But after applying to the base of the cement or concrete solution, several days must pass before it can be walking, and it is permissible to arrange a bulk sex only after 28 days.
Photo: Pavel Losevsky / Fotolia.com. The level of the dry mixture of the dry mixture is a rather thick mass.
If it is necessary to reduce the time for the preparation of the base without loss of quality, it is worth paying attention to self-assessing fast-hardening dry mixtures on complex or gypsum binder. They are most effective when leveled the most common deviations - from 5 to 60 mm, and locally and up to 100 mm. For the leveling of large deviations, other engineering systems are rational. The surface, aligned with a solution of such mixtures, after drying the layer does not need additional processing and is ready for decorative coating flooring. Many companies produce this product, including "VOLMA", KNAUF, Saint-Goben Construction Products Rus "(trademark Weber.vetonit)," Students ", Bergauf, Henkel (Ceresit trademark), Unis.
Photo: Pavel Losevsky / Fotolia.com. To increase the strength, reinforce the cement screed with a metal grid. To get a smooth surface, the levelover is distributed based on the tool: rule or spatula
The mixture on a complex binder is designed for the premises. However, they are often used to equalize the bases of balconies and loggias, which relate to the freezing structures. In this case, it will certainly cause destructive processes into the voltage layer of moisture during cyclical freezing / thawing. Such mixtures are permissible to apply for decoration of country houses for seasonal accommodation in fact. But only provided that the leveling layer is reliably isolated from moisture penetration, for example, with the help of floor cladding with ceramic tiles. As for wet heated premises, mixtures are suitable for them on a comprehensive binder, including the "Universal" horizon (UNIS), since the modifying additives included in its composition make it difficult to flow moisture into the hardened layer.
Evgeny Kosinov,
Head of the Cultural Center UNIS
Moisture - a friend or enemy?
Recall that leveling mixtures on a cement basis are used both in rooms and outside. The fact is that cement is a hydraulic binder (binder). When interacting with water, it solidifies in air and in a humid environment. Self-adhesive gypsum mixes are designed for rooms with a dry and normal humidity regime. Gypsum - binding air hardening, which last time maintains strength only in the air, and with systematic moisture, it gradually loses it and collapses.
Mixes on a complex binder (cement + gypsum in a strict proportion) effectively act indoors. They are more moisture-proof than gypsum and much faster gain strength compared to cement. But if experts unconditionally recommend using the latter in wet premises, then solutions on a complex binder is permissible to apply here only as part of a single engineering solution. For example, with good waterproofing of the base, followed by cladding of the floor with ceramic tiles or porcelain stoneware and thorough grout of interputric seams.
Photo: Peronda. Turning on the hidden "Warm floor", you can cut her drying time
Beneficial features
When using cement leveling mixtures, it is necessary to take into account that during drying the floor is seated. And although his shrinkage is small - 0.3-0.8 mm on 1 p. m, but on 10 pose M It will be already 3-8 mm! The lower the strength of the base, the smaller shrinkage rate must have the composition. The layer of plaster mixture and the mixture on an integrated binder actually does not give a shrinkage in solidification, and in addition, it is characterized by a high crack resistance. Work with such compositions is extremely convenient. After the mixture of water, they turn into a rather liquid substance, which is easily spreading along the floor, forming a flat horizontal surface. The finished solution is applied to the base to the level of in advance of the beacons, after which the surface is treated with a rail, and with a small thickness of the layer - needle roller for bulk ties. Please note: some manufacturers have a lifetime of self-leveling mixture, during which it remains mobile, easily levels and is well mixed with the following portions, is only 30 minutes, and others have increased to 60 minutes, which makes it possible to process a large area for one reception.The temperature of the carrying base and air indoors at the time of work on the arrangement of the leveling screed must be no less than 5 ° C and not higher than 35 ° C
Another useful property of self-deemed mixtures - they are quickly hardening, and on a flooded layer can be walking after 3-8 hours, thus, the base device does not slow down the repair. At the initial stage, the floor is poured, and then begin to align the walls, the ceiling, etc. While the masters are preparing other surfaces to the finish finish, the base is gaining strength. The drying time of the leveling layer is determined by its thickness and temperature and humid regime in the room. The screed of 10-20 mm thick is able to dry in 1-4 days. With the highest possible thickness (100 mm), the process takes up to 3 weeks depending on the composition of the mixture. The reason for this is the physical properties of materials, so it will not work up the drying. In addition, it is impossible to lay a laminate or a parquet or cork board on a wet screed or bulk gender.
There will be no problems if it is strictly followed by the recommendations of manufacturers of self-adjustable mixtures. In addition, almost all companies have contact telephone lines for which specialists explain the nuances of using one or another mixture.
Aligning screed device
Photo: Knauf. The base should be durable (at least 15 MPa), dry (residual humidity no more than 4%), clean
Soil is applied to its surface and wait until it dries
On the perimeter of the room is installed and fixed the edge ribbon
It reduces the transmission of shock noise and provides free deformation of the screed. Dry mixture of KNAUF-tribon fall asleep in water capacity and stirred by a building mixer to a homogeneous consistency
Then the finished solution is applied and smash it. To increase the fill speed, prepare a double portion of the solution
After 6 hours, it is possible to walk on the floor, and after a day - lay the finish coating
A typical error allowed by private masters when leveling the base with the help of self-determined mixtures is the use of inappropriate soil before applying the solution, which often leads to cracking of the screed. We recommend using under the universal self-deemed composition of the KNAUF-tribon soil "Grinder" or "Rotband-Gund" (KNAUF). They are designed to improve adhesion, regulation and reducing the absorption capacity of the grounds. Keep in mind that subsequent operations with the surface treated with primer are carried out only after drying it (at least 6 hours). At the same time, the time interval between the final drying of the soil and the beginning of applying the leveling solution should be as small as possible so that construction dust does not settle on the surface of the base.
Denis Izhutov,
Specialist of Knauf Gypsum
Characteristics of levels
Mark. | Knauf-Tribon | Boden Inter Gross. | Weber.vetonit Fast Level. | Ceresit CN 175. | "Quick-hardening bulk sex" | "Universal" horizon " | "Volma-Nivelir Express" |
Manufacturer | Knauff | Bergauf. | "Saint-Goben Construction Products Rus" | Henkel | "Students" | Unis | "VOLMA" |
Layer thickness, mm | 10-60 | 3-60 | 2-60 | 3-60 | 5-100 | 2-100 | 5-100 |
Viability of the solution in open container, min | 60. | thirty | thirty | thirty | 40. | thirty | 60. |
Partial load through, h | 6. | eight | 3-4 | 6-7 | four | 3. | 4-6 |
Laying outdoor coatings, day | one | 7 * | 1-21 * | 1-7 * | 3-7 * | 3-21 * | 7. |
Packaging, kg. | thirty | 25. | 25. | 25. | 25. | 20.25 | twenty |
price, rub. | 265. | 320. | 354. | 335. | 285. | 280. | 240. |
* Depending on the type of coatings.
