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Construction Plaster (G-4, G-5 brand) buy in Tashkent
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Construction Plaster (G-4, G-5 brand)

Construction Plaster (G-4, G-5 brand)

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Uzbekistan, Tashkent
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Technical characteristics
  • BrandTNGGS
  • Country of manufactureUzbekistan
Description

Plaster construction - the white or grayish powder of a high milling received from a plaster stone (natural plaster) by roasting at a temperature of 140-190 °C; the fast-setting and quick-hardening knitting substance.

Construction plaster is applied mainly to production of the plaster and gipsobetonny construction products applied to an internal part of buildings (dry plaster, peregorodochny plates and panels and some other) and also to production of limy and plaster plaster solutions for internal walls of buildings.

The Bystry skhvatyvaniye (curing) of plaster construction solutions is not always convenient. During the work with plaster solutions it must be kept in mind that the hardening plaster dough when hashing otmolazhivatsya and ceases to grab. Such solution applied on a surface has no durability - when drying there are cracks and the covering collapses. Solutions with plaster are prepared in the small portions (so-called zavodka) which have to be used within several minutes.

To slow down a skhvatyvaniye, add limy or clay solution or a special delay mechanism from 0.5-2% solution to plaster drills (all solutions are prepared on water). The hardened plaster is characterized by the high durability and rather low density (1200-1500 kg/m3); it more than twice easier hardened cement, so, and significantly less teploprovoden.

Plaster is made of a natural plaster stone by its crushing, steaming in autoclaves, drying and a grinding in spherical mills with the subsequent separation in a separator. Except natural plaster natural anhydrite (CaS04) and waste of chemical production — a phosphite and borogips can be used. Plaster has unique property - when heating to 120-140 °C, chemically connected water is emitted from a crystal lattice, forming the semi-burned plaster or alabaster, and the construction plaster (burned) it turns out at more high temperatures.

Construction plaster is used for production of artificial marble and production of some paints and pieces of chalk, and also for fixing of stekloizdeliya at their polishing, for example by production of mirror and optical glass. In mix with asbestos and other materials plaster is a part of heat-insulating compositions.

Indicator

The maximum rest of fractions on a sieve with a size of cell of 0.2 mm (in light) no more, %

Terms of a skhvatyvaniye, mines

Strength, not less, than a MPa

The beginning, not earlier than

End, not later

On compression

On a bend

Norms of GOST 125-79 for the highest category of quality

12

6

30

5

2.5

G-4

8

8

15.5

5.7

2.4

G-5

8

8.5

17

6.0

2.7

Thanks to it it was succeeded to develop the production technology of the plaster knitting G-4 and G-5 with indicative characteristics of terms of a skhvatyvaniye and strength on a compression/bend. And even the plaster knitting G-4 by results of tests of VNIISTROM of Budnikov at certification of a product on compliance to norms and requirements of GOST 125-79 showed the characteristics meeting the requirements to knitting the highest category of quality.

 

 

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