Study of the Hydration of Blast-Furnace Slag Cement and Portland Cement by Mossbauer Spectroscopy
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Mossbauer spectra have been measured for the hydrated blast-furnace slag cement and Portland cement pastes at different times of hydration of 1. 3. 7. 28 and 90 days. The spectra showed the existence of iron atoms, Fe3 (T) and Fe3 (0) states of iron. It was found that, as the time of hydration was increased, the Fe3 (0) content decreased, while the Fe3 (T) content increased. The Fe' (T) /SFe34" percentage was calculated for the two types of cement as a function of the time of hydration. A correlation has been found between this ratio and the compressive strength of the hardened cement paste.