Examination of Portland cement hydration by rf spectroscopy

The process of cement hydration was examined using radio spectroscopy of 2,2,6,6-tetramethyl-4-hydroxypiperidine-1-oxyl spin labels. A suggestion was made that cement hydration should take place along several routes, including the radical or ion-radical one. It is shown that addition of substances generating active free radicals leads to an increase in the strength of cement stone by 40% due to a change in the ratio of crystalline and amorphous phases of matter. Formal patterns of hydration along the radical route are presented.
Author: Ye.A. Fanina, A.N. Lopanov

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