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प्रश्न
Mention the Raw material of Portland cement along with their percentage composition.
थोडक्यात उत्तर
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उत्तर
| CONSITTUENTS | PERCENTAGE(%) |
| Lime | 60-68 |
| Silica | 17-25 |
| Alumina | 3.8 |
| Gypsum | 2-3 |
| Iron oxide | 2-4 |
| Sulphur trioxide | 1-2 |
| Alkali oxides | 0.5-1.3 |
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Cement - Chemical Composition and Constitution of Portland Cement
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