Hydration processes of cement paste-an EPR study

R. Gopalakrishnanı and D. Govindarajan²

ıDepartment of Physics, SRM University, SRM Nagar - 603 203 (India). ²Department of Physics, Annamalai University, Annamalai Nagar - 608 002 (India).

Received on April 10, 2010 and accepted on May 19, 2010

ABSTRACT

The present works reports the hydration processes of Portland cement through Electron paramagnetic resonance study. Cement pastes in a Water to cement ratio (W/C) of 0.4 at different hydration time intervals have been prepared. The g-factor of Fe(III) and Mn(II) impurities at different hydration ages has been related to changes in setting time of cement. Both gFe and gMn values are reach a maximum values at final setting time of OPC paste.

Keywords : EPR, Cement paste, Hydration, g-factor.