Calcined Gypsum:

SMC established one of the modern plants in the Middle East to produce Calcined Gypsum from Gypsum deposits at Ras Malaab, south Sinai. The plant was contracted with the support of USAID with annual production of 250,000 tons and is marked under the name of "Nejmetsinai" that means the Star of Sinai.

Product Characteristics:
  • Physical   Properties:
Initial setting time 8  : 15 minutes
Degree of whiteness 96  min.
Fineness, Retained On sieve 0.15 mm ( 100 mesh) 6%  :  10%
Green , bending strength “after 24 hours” 30 Kg/cm2, min.
Dry , bending strength “after one week” 55 Kg/cm2, min.
  • Chemical Specifications:
Constituents
Typical   PCT
Crystal water
5 :  7
Hemi-hydrate “ Caso4.½ H20”
94.00 min.
Insoluble  Residue
1 .00 max.
Fe2O3
0.07 max.
Cl
0.015 max.
CaO
37 :  38
So3
52 :  54
Moisture
0.00
    Packing: in 33 Kg. paper bags as the standard product, and/or according to the customer requirements.