The breakthrough in the development of technologies from time to time takes place in different areas of science, technology and production. Did not pass such a technological breakthrough in the field of materials and construction techniques. The last notable event in the production of new building materials was the emergence of a new segment of the finishing materials of the product — cteklomagnezitovogo sheet (SML). This product is a direct rival, if not a substitute for plasterboard sheet.
LSU is a relatively new material for the construction market of the Russian Federation, but nevertheless, gradually gaining a niche in the segment of modern building construction materials — primarily in the field of industrial and civil construction, and gradually coming to the market and private consumers.
So what is Steklomagnezitovy (or in another way, glass-) list?
It is composed of magnesium oxide (MgO), magnesium chloride (MgCl2), Water (H2O), perlite, and reinforcing fillers (chips, fiberglass, propylene tissue).
Magnesia binders (caustic magnesite and dolomite), mixing a solution of magnesium chloride, securely connected to the organic fillers and protect them from decay. Cement stone formed on the basis of a magnesia binder is a solid solution of salts of complex composition. It is on the basis of magnesia binders get different stone-like materials with predetermined properties under the name "Magnolia." Magnesia binders used for the manufacture ksilolita and fiberboard. Xylene — a kind of light-weight concrete, artificial building material from a mixture of magnesia binder, sawdust and wood flour with the addition of fine minerals (talc, marble powder, perlite) and alkali-resistant pigments.
The names of KVL-ksilolitovoloknisty, KML-ksilolitomagnievy sheet that appeared recently on the market of finishing materials represent the same LSU. In Russia, it is also available under the trade names Novolist, Stroylist.
As examples of Russian producers of LSU may be called ZAO "Spinox" in Tyumen, LLC "GC" Strategy and Parity "in Voskresensk, Moscow Region, JSC" Caustic "in Volgograd.
Ltd. "Stroyevolyutsiya" in Nut-Zuyevsky district of Moscow region, as well as LLC "Evolitprom" let LSU branded Evola. After analyzing the experience of the production of magnesia concrete, and also studied the Russian raw materials, LLC "Stroyevolyutsiya" on the basis of its own laboratory, with the assistance of leading building centers — MGSU Kyibyshev, NIIMosstroy has been optimized formulation, resource base and regulations of the manufacture steklomagnezialnyh sheets. Currently, these companies have begun to implement a program for the production of uniform thin-walled elements and protecting load-bearing structures on the basis of a modified magnesia binder.
Brief description of manufacturing glass-plates:
The filler is graded on a vibrating screen, conveyor screw is fed through a compulsory mixer portions using the dispenser, there is a dispenser is supplied and magnesite, which is mixed in dry form. A saturated solution of magnesium chloride is prepared separately in the mortar mixer, then fed into the mixer, where he is preparing molding sand.
The composition of the mixer is fed to the molding plates — vibrating table, on which are placed the pre-lubricated formwork. Non-woven fabric stretches from the drum above the table, stacked molding sand, sand is placed on top of glass fabric, compacted to a certain size, then decking is installed in a cassette with subsequent transfer to the zone of curing. After curing glass-plate cut. Then the plates are soaked to remove salt residues, then dried. Next is the adjustment of the edges of plates, plates for quality sorting, and storage.
So Steklomagnezitovy list (SML) — versatile material for finishing surfaces in exterior and interior applications. Its field of application is extensive. As of drywall, you can do it from ceilings, walls and interior partitions. Moreover, by using glass sheets can be magnesite finish exterior facades of houses and cottages.
LSU environmentally friendly and does not contain harmful and toxic substances (in particular asbestos) did not emit when heated. LSU sheet weight is 40% less weight GVL. LSU (reinforced fiberglass) has a bend radius of 2.8 meters. This quality allows its use on uneven surfaces, reduces the likelihood of fracture sheet at work and moving. In the face of the sheet obtained Steklomagnezitovy flexible, durable, fire-resistant, water-resistant material for decorating.
High scores for this parameter as moisture resistance, allows the use of LSU in a high percentage of moisture. The sheet is easy to use: one side of the LSU (smooth) can be decorated wallpaper, film, wood veneer, and the other (relief) — use a decorative plaster, ceramic tile sticker, etc., applying any paint.
In some cases, high quality and good appearance of the relief side Steklomagnezitovy sheet eliminates the need for painting or finishing.
LSU with a marked superiority in many physical parameters can replace the usual plasterboard, particle board, and other sheet materials traditionally used primarily in the construction and finishing works.
An important attractive feature of the new material is the low flammability (combustibility group G1), or even an absolute non-combustible (group NG), depending on the manufacturer. Today, no construction of the surfacing material sheet comparable to LSU in terms of fire safety. When the thickness of the sheet to 6 mm, it can hold the fire for 2 hours, and in general can withstand heat up to 1200 degrees.
Of course, LSU has some drawbacks. For example, it is more fragile than the GVL (gypsum sheet). In addition, manufacturers are producing sheets of varying quality, which is caused by the lack of a unified national standard for this stuff. However, the unification of quality — just a matter of time. And there is no doubt that such material in Russia, where more than half the world’s reserves of magnesite raw materials, can be simply brilliant prospects. It is no coincidence there has been a significant surge of interest in him.
However, the widespread introduction of magnesia binder in building practice will need to solve a number of problems the federal level from the development of national standards and building codes regarding magnesia binders and building materials based on it, to the organization of production and processing of raw magnesite in industrial quantities.