Group Company of Vicat, France
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OPC 53 Grade
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Ordinary Portland Cement 53 grade is manufactured by inter grinding of high grade clinker (with high C3Scontent) and right quality gypsum in predetermined proportions. The cement produced gives high early strength and excellent ultimate strength. |
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Properties
a)Physical |
Requirements as per
IS12269-1987 |
Bharathi cement
values
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Competitors values |
| Fineness (sqm/kg) |
225 (min) |
325 |
280 |
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Soundness (mm) |
| Lechatlier method |
10mm (max) |
1 |
1.5 |
| Autoclave (%) |
0.8 (max) |
0.03 |
0.05 |
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Setting time |
| Initial (min) |
30 minutes |
150 |
270 |
| Final (max) |
600 minutes |
260 |
330 |
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Compressive Strength (MPa) |
| 1 day |
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20 |
16 |
| 3 days (min) |
27 |
39 |
32 |
| 7 days (min) |
37 |
49 |
45 |
| 28days (min) |
53 |
70 |
60 |
| b) Chemical |
| 1) Lime saturation factor |
0.8-1.02 |
0.9 |
0.88 |
| 2) Alumina Modulus |
0.66 (min) |
1.23 |
1.23 |
| 3) Insoluble residue (%) |
4 (max) |
0.25 |
1 |
| 4) Magnesia (%) |
6 (max) |
1.1 |
1.23 |
| 5) Sulphuric anhydrideSO3 (%) |
3 (max) |
1.5 |
1.95 |
| 6) Loss on ignition (%) |
4 (max) |
0.8 |
1.5 |
| 7) Alkalies |
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| 8) Chloride (%) |
0.1 (max) |
0.002 |
0.01 |
| 9) C3A Content |
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7 |
7.48 |
| 10) Temperature during Testing |
27±2 |
27±2 |
27±2 |
| 11) Humidity (%) |
65±5 |
65±5 |
65±5 |
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| Advantages |
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Speedy construction
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Durable concrete
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Economic concrete mix designs
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Low percentages of alkalies, chlorides, magnesia and free lime leads to the production of durable concrete.
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