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

Section: Science and production

Keywords: hydration; radio spectroscopy of spin labels; a hydration route; durability of a cement stone