Gypsum
The gypsum from raw ground common, one of the most metal sulfates widespread in nature, metal or rocks of sedimentary, and resides usually with limestone, dolomite, clay, and it interferes with the mineral anhydrite calcium sulfate anhydrous and have a color, usually white or gray, and sometimes tilted to redness, and there is gypsum in nature, either on the surface of the ground or at depths varying up to more than 200 meters.
Chemical Name: Hydrate calcium sulfate
Chemical formula: CaSO4.2H2O
Origin: Egypt.
| Testing |
Results |
| Setting time by minute |
13 |
| Bending strength by kg/cm2 after 24 hours |
40.5 |
| Bending strength by kg/cm2 after 7 days |
51 |
| Fineness |
|
| Passage through mesh no-100 sieve opening 0.15 mm according to ASTM |
99 % |
| Residual on mesh no-100 sieve opening 0.15 mm according to ASTM |
1 % |
|
|
| Percentage of NaCl |
0.07 % |
| Percentage of CaCo3 |
4.54 % |
| Percentage of MgCo3 |
0.38 % |
| Percentage of Al2O3 |
0.15 % |
| Percentage of insoluble + SIO2 |
0.49 % |
| Percentage of CaSo4 1/2 H2O |
91.40 % |
| Percentage of CaSo4-2H2O |
1.63 % |
Packing : 25kg bag,50kg bag,Bulk
| Testing |
Results |
| Percentage of free water |
0.29 % |
| Percentage of combined water |
18.90 % |
| Percentage of CO2 |
2.77 % |
| Percentage of silicon dioxide + isoluable matter |
1.13 % |
| Percentage of R2O3 |
0.45 % |
| Percentage of free lime |
0.45 % |
| Percentage of CaO Total |
33.10 % |
| Percentage of MgO |
0.24 % |
| Percentage of SO3 |
42 % |
| Percentage of NaCi |
0.08 % |
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Egyptian Import, Export and international marketing company based in Egypt
