FT-IR spectroscopy is employed to investigate the effect of the local porosity, i.e., water to cement (w/c) ratio, at two different curing times of 3 and 28 days on the bands spectra in the ordinary Portland cement pastes (OPC) in the spectral range 400 to 4000 cm-1. The study revealed the characteristic changes in the stretching and bending vibration modes of the SiO4 group (≈ 460 cm-1), the stretching vibration modes of the C-O and of C=O bonds (≈ 970 cm-1, and 1430 cm-1) (the strong absorption of the 2- 3 CO group in the lattice region), and finally, the stretching vibration of the water molecules (vibration of the OHgroup < br />of the Portland CH phase). The results have indicated that the critical conditions for the change accompanying these vibration modes during the hydration mechanism of the OPC samples occur at (w/c) ratio of 0.3, and 0.35 independently of the hydration time.
(2011). The Effect of Porosity and Curing Conditions on the Bands of the Infrared Spectroscopy in Blend Cement Pastes. Egyptian Journal of Solids, 34(1), 77-91. doi: 10.21608/ejs.2011.148862
MLA
. "The Effect of Porosity and Curing Conditions on the Bands of the Infrared Spectroscopy in Blend Cement Pastes". Egyptian Journal of Solids, 34, 1, 2011, 77-91. doi: 10.21608/ejs.2011.148862
HARVARD
(2011). 'The Effect of Porosity and Curing Conditions on the Bands of the Infrared Spectroscopy in Blend Cement Pastes', Egyptian Journal of Solids, 34(1), pp. 77-91. doi: 10.21608/ejs.2011.148862
VANCOUVER
The Effect of Porosity and Curing Conditions on the Bands of the Infrared Spectroscopy in Blend Cement Pastes. Egyptian Journal of Solids, 2011; 34(1): 77-91. doi: 10.21608/ejs.2011.148862