The use of wood keel fixed wooden floor construction is a commonly used method of laying flooring under the conditions of drying equipment, drying technology, moisture-proof insulation and anti-corrosion materials are relatively backward, drying technology, drying equipment are very advanced, a wide variety of materials today look Many ills.
The installation fee is a lot of work and noise, and the wooden floor after installation is prone to many problems. The most complaints about single-layer solid wood flooring are tile deformation, dry cracks, and noisy walking. The phenomenon of tile deformation in the single-layer solid wood floors in use is mostly found in the hall. Why does it appear in the hall but not in the bedroom or in the bedroom? Why does the phenomenon of plate deformation occur in the halls of houses and old buildings that have been completed for several years? Why is there still a layer of plastic film or a layer of moisture-proof film that will cause the deformation of the tiles? Most people are puzzling about this.
The main reason for the deformation of the tiles in the wooden floor in use is that the multi-layer paint on the surface of the board has closed the fibers of the wood. The multilayer paint film has a certain degree of hardness and has a stable pulling force on the surface layer. The moisture absorption at the bottom of the board expands. , The size of the board has not changed. The water content of walls and floors for newly delivered residential houses is more than 30%, that is, houses that have been delivered for several years will not live for a long time. The moisture content of closed buildings in doors and windows is also difficult to reduce when dry wood flooring (moisture content Q13%) ) Hygroscopicity on the bottom of the board causes the expansion plate to become a tile shape, nails can not prevent this deformation.
When the building's moisture content decreases by less than 8%, the wood wedges and keels will shrink and loose, and the keel will also deform. Loose deformation between them creates gaps, and noise is generated when people move around. This is unavoidable.
In the flooring industry popular with this sentence: three-point product, seven installment. According to a survey by the flooring industry, installation is a weakness in floor consumption. There has been continuous disputes over the floor, and it is inseparable from the current practice that salespeople are heavy marketing and light installation.
The first step is to clean up the construction site, and to trim the edges or corners, such as protrusions or uneven parts, on the ground level (measure the ground flatness with a two-meter ruler, and the requirement must not exceed 3 mm). At the same time drill holes in the bottom of the wall to prepare for the installation of the floor baseboard. Drilling is a bit of a knowledge: to be highly suitable, basically living in the middle of the baseboard; to be even, usually 2.4 meters long skirting line to drill 5 holes to fix, of course, the skirting joint to drill; third should pay attention Avoid the circuit on the wall, so as not to damage the circuit, otherwise it is difficult to determine the position of the circuit according to the position of the cassette.
After sweeping the floor, begin to lay the damp-proof floor mats. In addition to the moisture-proof function, the floor mats can also make up for the unevenness of the floor and increase the floor feeling. It is also worth noting that if the home is geothermal, it needs to be replaced with a special heat-conducting aluminum-platinum mat. The price is 2 yuan per metre. In addition, after the floor mat is finished, it is necessary to use a tape to stick the joints. First, it is afraid of moving, and secondly, it increases moisture resistance.
Formally began to install the floor. Because the floor is to be installed in a staggered manner, a part of the floor is to be sawn in half. Here are some points to remind consumers to pay attention to: First, be sure to open the floor all the way before sawing the floor, pick out the floor with problems or sloppy saws, this can effectively use the partial floor of the problem, do not produce Excessive loss. Don't take the floor and saw it, it will increase the loss. Second, the location of sawing the floor must be selected in the balcony and other places where there is a good tile to take care of the health, otherwise the splash of wood ash will penetrate everywhere, it is difficult to clean.
Because the floor has a certain expansion rate, it is necessary to reserve expansion joints in the places where it touches the wall before paving, so as to prevent the floor from kicking. Of course, this expansion joint is also one of the main channels for the exchange of underground air and ground air. In other words, it is also one of the main channels for underground pollution released into the house. There are also front and rear locks, that is to say, floors with such multiple locks are firmly attached even without glue.
After the floor is finished, the baseboard is installed. There is also a saying on the corner joints of the baseboards. It cannot be a simple 45 degree connection. Since the wall has a certain moisture content, a simple 45 degree connection will result in a drum because there is no space when the baseboard expands. The correct Anfa shall be laid on one side and leave an appropriate expansion gap at the junction with the wall.
The overall effect after pavement
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Pharmaceutical raw materials encompass elements that are required to manufacture a variety of different drugs. These materials are derived and extracted from sources that could be natural or synthetic. Every pharmaceutical is made up of active ingredients .
Pharmaceutical industry has a lot of constraints and specialties which make it stand on a completely different scale than any other industries. Being closely related to the medical field and also complementary to it, the pharmaceutical industry needs utmost care and precision in each and every aspect of the field ranging from collecting the raw materials to getting the final product ready for supply in the market. ï‚ž Let us get into a few details about the pharmaceutical raw materials and find out some important and interesting facts about them.
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