Free lime quantitative determination by X ray diffraction, on anhiydrous and dried cement
In manufactured cements, and concerning the quality control, the fast determination of the contents of free lime is a necessary step. The measurement of the content is made taking the net altitude of one peak of the DRX which, on each case, is peculiar to the compound to be determined. So, a calibrating curve is drawn, using there synthetic samples prepared with original cement with addition of 1%, 3% and 5% in weight of calcium oxide prepared fusing at 1100 °C for two hours a Merkc precipitate calcium carbonate. This calibrating curve allows to know the free lime content in original cement, when the results obtained by X ray diffraction is carried to the calibrating curve.
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