Wednesday, March 19, 2008

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What is concrete?

 water, cement and fine filler material - these are the most important components of concrete. Depending on their characteristics and composition are changing the properties of concrete. One of the main parameters determining the resistance of the flooring, the subsidence of the concrete mass. It is determined according to the water / cement ratio and the number of special additives - The smaller the water to cement ratio, the more quality cement.

Before laying the concrete floor facility should determine the state of the substrate. If the floor is laid for the first time, research is needed surveying the area from which you will be able to plan work. If the old concrete surface, you should first read the technical documentation for its styling, and if does not exist - do research. This will help to accurately splanować work. It is also important whether the substrate has a waterproofing.

Then:

  • Preparatory . If the substrate is old, you must remove the sick part of it, the floor wash away dirt, dust and grease.
  • Waterproofing . If the existing substrate and a new floor put a layer of polymer, it not only stops moisture, but also reduce the possibility of the appearance of cracks due to subsidence. This layer provides the advance of the concrete surface between the joints. If this layer will not, joints may arise between the cracks.
  • Strengthening. If the substrate is quite strong, it strengthens the grid with one or two layers of the valve. Net is destined to take over the burden of subsidence in hardened concrete.
  • concrete additives. Before the appearance of cracks in fresh concrete protects the use of polymer fibers or metal fibers. The concrete plant along with the fiber is inserted into the plasticizers - concrete additives to reduce subsidence. The remainder of the plasticised concrete is poured into the square, since the time of their actions wynisi - 30-50 min. Plasticizers are selected depending on the needs of technical and temperature.
  • adopting concrete foreman should already have a plan to end the project. If the ground is laid thick cover such as concrete and magnesium or to cover the polymer with the addition of quartz, adopted concrete enough to thicken the concrete vibrator and smooth vibrating sander. In the case where the finished surface will be piling thin polymeric cover or it is painted, the concrete should be equal to the equations of special machines, concrete, thereby enhancing its upper layer, because the thin layer covering all the inequality persists concrete.
  • Prevent accumulation of dust can be the concrete floor being careful thickening mineral additives. These materials are applied to the freshly placed, leveled concrete. It is a concrete maintenance measure, which also improves its drying. In a way it złańcza chemical materials that produce dust, so the floor becomes a stronger and more can be cleaned.
  • Expansion joints. When laying concrete floor should be remembered of joints in the settlement. These connectors are divided into the concrete surface in such a way as to allow it to settle and there were no cracks causing internal loads. The depth of connections varies from 30 mm to 1 / 2 thickness of concrete, depending on the thickness and device technology. Spare connector is filled with special elastic material.

over time to affect different parts of the building load. Most are charged to the floor. Concrete composition and method of stacking may be impact on its durability, resistance to know, density, cooling, subsidence and water. Keep this in mind when laying the floor. Although

, concrete can withstand heavy loads, however, if the anticipated installation of a concrete floor in a place where great demands are placed, you should note that the method of laying a concrete floor with a stronger top layer is called toppingu. This method also helps protect the top layer of dust that arises when the upper layer znaszaniu.

Technology floor installation of reinforced concrete top layer is pretty simple. To the newly arranged and adjusted the concrete surface is rubbed with a special dry mix, which significantly strengthens the technical characteristics of concrete: flattening resistance, impact, you know, is less accumulation of dust and improves the overall appearance of the floor.

What are dry curing concrete?

dry mixture of hydraulic cement, and minor additions to be evenly rubbed into the surface of the concrete before it hardens, then corrected to give the surface desired properties. The mixture may contain pigments or may not contain.

While rubbing a mixture soaks into the top layer of concrete and made it even denser. After the final sanding is closed most of the pores located in the concrete surface, which increases its resistance to cold. Such a floor can be used 15 - 20 years. The reinforced layer of concrete, forming a whole is essential, because both covers are arranged with the help of Portland cement. Resistance of the upper layer is 90 cps, and more. Dry-floor hardeners produced by modern technology can withstand very heavy burden - even tracked machines.

Advantages floor arranged on the basis of technology topping :

Longevity;

not be dusting;

Greater resistance to know;

Easy care;

short technological process;

floor can be colored;

constitutes the entire top layer of concrete is not essential and odłańcza;

Where it can be installed?

  1. In plants, warehouses;
  2. In the area of \u200b\u200btrade;
  3. in garages for cars and trucks;
  4. On parkingas;

Properties

floor - walk on the floor can be after one day;

- light loads are allowed after one week;

- total load floor is allowed after 12 - 28 days.

http://pl.pl.allconstructions.com/portal/categories/8/1/0/1/article/32 # article

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