Polusuhaya screed, advantages and technology

A man comes up with something new every year, seeking to create a versatile construction methods, more robust and durable construction. In this case some of the important conditions are of high quality and efficiency of operation. All this allows to get a semi-dry screed with their hands. The resulting finish is durable, resistant to all sorts of stress and perfectly flat.

Today, there are several ways to create a perfectly even and smooth floor:

• wet screed;
• dry;
• filler;
• semi-dry.

Increasingly popular is semi-dry screed. What are its advantages over conventional concrete pouring? And how to make a semi-dry screed floor with their hands? there are different ways to align the floor of the lighthouse.

First of all, the thickness of the semi-dry screed can reach 5 cm, while it remains strong and durable.

If the screed is considerably thicker, it is recommended to fill large cavities leveling solution. Or pour conventional concrete with gravel.

Secondly, polusuhaya screed easy to equalize before the date of complete solidification. In the preparation of the mixture used is well sieved sand and cement, ordinary high grades.

Thirdly, floor, configured using a semi-dry screed, It has the best indicators of thermal and sound insulation. This is achieved by adding fibers.

Fourth, at pouring the semi-ties thanks to the presence in it of a small amount of water, it does not follow the edge of the waterproofing and misses the slab. Thus does not cause trouble to neighbors below floor.

Fifth, semi-dry screed therein due to the presence of polymer fibers is more resistant to cracking and shrinkage.

Features a semi-dry screeds

With the advent of new building materials, new technologies are born, allowing to obtain the same products, but with better performance. liquid Cement-sand screed and still remains the most common, this is due, probably, originated habit.

Semi-dry screed made with his own hands from the solution, consisting of the same components, but only the ratio of sand to cement is selected 1:2. As mentioned previously, to improve strength, elimination of cracking and shrinkage, usually typical for mortars, apply fibrovolokno.

Fiber is a polymeric fiber length of 6 to 18 mm and thickness 30-35 m. New leads to concrete and gypsum products stronger, due to uniform distribution throughout the volume of the mixture. This arrangement of particles, confined between a, create a huge resistance to the concrete layers, securely fastened together and creating a monolith.

Types of semi-dry screed, depending on the destination premises

By performing half-dry method can be screed machine mode and manual. The first type involves the use of special equipment for kneading the mixture, feeding it to the place ties and mashing. By using art process is greatly accelerated and the resulting finish is better in all respects. By machine can cover a much greater area of ​​the premises in the same time.

Also, depending on the destination premises any screed, including semi-dry, can have different mount technology. Making the semi-dry screed their hands Video, applied to the article, It will be an excellent tool. Consider some of the most common techniques create a tie in the kitchen, which are described in the attached video to the article.

The first method is to even the floor without the need for additional insulation. It can be applied not only in private homes, but also in the apartments on all floors, there is no need to worry about the repair of neighbors on the floor below.

To create a semi-dry screeds with their hands the technology can be different depending on the destination premises. But it can also be differently configured:

• by means of guide beacons;
• with the help of small islands or areas.

The first method can be performed without the use of laser level. On the prepared surface mounted beacons. These may be T-shaped perforated strips or profiled square pipe. The main idea of ​​this technique is to fill the solution or mixture for a coupler space between beacons, and the next day or after a minimum 12 clock extraction from their sex and putty joints with the same solution with subsequent grouting.

We take a closer look how to create ties with a laser level.

flooring types, depending on the required functions

Depending on the desired function from the premises, eg, heating installation is required or not, can be divided floors, performed using a semi-dry screed two types:

• unheated;
• heated.

The technology of creating a semi-dry screeds without the use of beacons and without heating

If you do not need to install a heating system in the floor, the semi-dry floor screed in the apartment with his hands fulfilled exclusively for finishing the surface of the alignment.

Semi-dry screed requires no further alignment. Thanks to a thorough grout during mounting surface turns out perfectly flat and smooth.

Substrate preparation

To obtain a steady and level concrete floor, you need the maximum quality prepare base. To do this, use a vacuum cleaner or a broom with soft bristles thoroughly swept subfloor. large cracks, gouges and pits must first conventional solution to cover. Thus aligning it with the more. Old solution, not part of the concrete slab or monolith need to be removed with a hammer and chisel.

Free of dust and debris cover the bonding surface must be ground or other similar materials to it. Modern acrylic fillers other than gluing have excellent antiseptic properties, so a good impregnation ensures always dry floor.

If the ground is loose enough, it is possible to apply several layers of soil. Important to remember, that the strength of the subfloor vary the properties of the screed.

Prerequisite of creating high-quality installation is the screed damper tape around the perimeter of the room. It is required to compensate for the expansion of the floor as a result of temperature changes. The pieces of penoizol may be used as it (thick polyethylene foam 4 mm), width 15 cm. For convenience, it is better to be stuck on a glue.

After processing and drying the floor, you can create semi-tie their own hands, Video process which exists in this article. Just a lot of mixture is not necessary to prepare, because the technology in question involves the creation of indicative areas, islands, which will further align the floor.

Mixture for semi-dry screeds

To prepare the solution can be applied ready mix, which is implemented in bags at any hardware store. Or you can prepare yourself in the sand and cement. The sand must be carefully sifted through a fine sieve. It's necessary, that in the course of work (alignment and mashing) avoid problems with small pebbles and debris, which abound in the river sand.

Cement is better to use 500 marks and 1 categories. To prepare the solution in a ratio of 1:3 cement mixed with sand and thoroughly mixed.

Uneven or not fully blended mixture can not be sufficiently ductile, which significantly worsen the parameters ties.

To improve the thermal insulation properties, elimination of cracking and shrinkage is recommended to add a little fiber. There are several dosages for certain properties. On average, 1 m³ ties required by 0,6 to 0,9 kg fiber. It is added directly into the mixture or into the water. It is important to thoroughly mix.

If you use a concrete mixer, the duration of mixing in 15-20% more, than when mixing conventional solution. It is important to achieve uniform fiber distribution of particles throughout the tank volume.

Advantages and disadvantages of semi-dry screeds

Semi-dry floor screed pros and cons also has. Positive aspects were described earlier in the article,. On the downside can be attributed only to a rather long process of alignment and rubbing semi tie.

The ratio of water in solution

When water is added should be very careful. It is important not to overdo it, since due to excessive stress considerably deteriorate work process, thereby reducing the quality and.

In order to check the amount of liquid in the solution, strong enough to crush some of it in the fist. In this case, between the fingers should not exude moisture, and he clenched his hands at the lump remains unchanged.

Seven is brought to a uniform status for consistency, and get to work.

Create islands Beacons

When creating indicative areas should apply the technology of "wet on wet". That is, before the application of the sub-floor surface should be wetted with the solution, moreover, do it better adhesive mixture. Alternatively adhesive may be applied to tile, diluted to a state of consistency or liquid yogurt cream. Immediately proceed to the creation of an estimated area. To do this just prepared mixture is spread on the approximate number of wetted spot. And level with the help of flexible plastic rake or similar tool.

Not necessarily buy at the store household goods rakes, the process can be performed in the usual trowel, uniformly leveling a pile and loosening large gluing.

After loosening and uniform distribution of the estimated site solution (majake), it must be well potrombovat. This can be done simply by her hiking shoes with a flat protector or use any hand tool. Well pressed down by a surface float overwritten. It is better to use a polyurethane, since the semi-dry cement creates considerable opposition.

Iced surface periodically monitored by means of a ruler and a previously set in the center of the room to the laser level. Doing this it is recommended in several places site. Small dimples again filled with the mixture and again overwritten for a perfect smooth surface. Everything, first beacon prepared. You can start making the next. It is necessary to do away 15-20 see closer, than the length of the rules.

Generally recommended to use a rectangular cross section, and they should work strictly in a perpendicular position.

A bit of litter and hardened beacons must be placed at the corners or edges of the room to the previously mentioned distance. This will allow in further work to reach a larger perimeter space. While the islands are frozen, possible to prepare the remainder of the solution. Its volume is quite easily calculated, online calculator.

Further, process is as follows::

• The mixture is evenly distributed over the remaining space or small areas. compact, and overwritten multiple passageways aligned rule mapping to the ideal plane between beacons.
• Lighthouses better connect the parallel guide bars, To get the kind of runners to work with a coupler in the center of the room.

The whole process of working with semi-tie long enough and requires some diligence, therefore, should be treated with the utmost responsibility.

Apparatus semi screeds require a moist environment for high quality cement crystallization. Therefore, a polyethylene film is used, it covered areas screed ready for a few days. If you do not use it, then the next day and not earlier 12 hours, gently moving on screed, it must be thoroughly wetted with water for the same reasons.

Videos for the creation of a semi-dry screeds

To navigate through the screed is recommended to use special walkers like snowmobiles, but only with a continuous planar surface. This eliminates the likelihood of defects and failures when moving on it. Complete solidification loop is not less than 1 weeks at a temperature above 15⁰WITH.

Sex electrically heated

Technology create a floor with electric heating is the use of thermal insulation materials, such as polystyrene and penoplex. Top of them is mandatory to be installed in steel mesh for reinforcement of ties, moreover, it must be in her mid. The detailed technology and work process can be viewed in the attached video.

Opinion about the quality of semi-dry floor screed

Vaughn illustrative example when manufacturing the dry technology broken floor screed.