Market construction
Market construction

Undercoat gypsum Khorasan gypsum

Khorasan gypsum
Iran

Khorasan gypsum is produced using the best raw materials and using the most modern industrial machinery with a compressive strength of 80 kg /cm2.
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Undercoat gypsum Khorasan gypsum

Plaster of building adhesives is an air adhesive. Building plaster is obtained by baking gypsum at a temperature of about 180 degrees. The chemical formula of gypsum is calcium sulfate with two water molecules which after boiling, about (75%) of its water is vaporized and the building gypsum is obtained by chemical formula CaSO4.0.5H2O. Pure plaster is white, but impurities cause it to change color.

Advantages of construction gypsum:

  •  Being early
  •  Volume Upon Hardening:
  •  Fire resistance
  • The property of being acoustic
  • The property of being plastic
  • The price is right
  • Abundance and availability

Disadvantages of construction gypsum:

  • Not resistant to water
  • Corrosion in metals
 

Color
Cream-brick
Initial capture (min)
7
Secondary capture (min)
15-17
Compressive strength (kg / cm2)
80
Flexural strength (kg / cm2)
20
Bag weight (kg)
40

Two-day flexural strength

Minimum SO3 (%)
36
Minimum CaO (%)
24
Maximum Na2O (%)
0.3
Maximum MgO (%)
0.6
Maximum H2O (%)
6

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