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- 1). Subtract one percent from the CaO to account for lime that did not melt into the clinker. For example, 66.6 percent CaO becomes 65.6 percent CaO.
- 2). Calculate the alite according to this formula: 4.0710 * CaO minus 7.6024 * SiO2 minus 1.4297 * Fe2O3 minus 6.7187 * Al2O3. With 65.6 percent CaO, 21.5 percent SiO2, 2.8 percent Fe2O3 and 5.2 percent Al2O3, the amount of clinker in the C3S phase turns out to be 64.7 percent.
- 3). Calculate the belite according to this formula: 8.6024 * SiO2 plus 1.1 * Fe2O3 plus 5.0683 * Al2O3 minus 3.0710 * CaO. With the same numbers from above, the result is 12.9 percent of the clinker is in the belite phase.
- 4). Calculate the aluminate phase according to this formula: 2.6504 * Al2O3 minus 1.6920 * Fe2O3. With the same weight percentages, the C3A content is 9 percent.
- 5). Calculate the ferrite phase, lastly, by multiplying 3.0432 by the Fe2O3 oxide weight percentage. Therefore, 3.0432 times 2.8 yields a ferrite phase content of 8.5 percent.
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