Fig. 10. Structure model of ettring

Fig. 10. Structure model of ettringite (according to Dr. J. Neubauer/University Erlangen/
Germany) (left), infrared spectra of ettringite (right).
The other crystalline phase present in cement hydration, portlandite, Ca(OH)2, shows two
prominent sharp peaks, the first one at 3645 cm-1due to the presence of OH stretching and
the second one at 353 cm-1 assigned to Ca-O lattice vibrations (Figure 11).

Results (English) 2:

Horn. 10. Structure ettringite model (according to Dr. J. Neubauer / University of Erlangen /
Germany) (left), infrared spectroscopy of ettringite (right).
The other crystalline phase is present in cement hydration, portlandite, Ca (OH) 2, showed two
sharp peaks stand out, the first at 3645 cm-1due the presence of OH stretching and
the second one at 353 cm -1 assigned ca- O vibrating mesh (Figure 11).

Results (English) 3:

fig. 10. structure model of ettringite (according to dr. j. neubauer / university erlangen /germany) (left), infrared spectra of ettringite (right).the other crystalline phase present in the cement hydration, portlandite, ca (oh) 2 shows twoprominent sharp peaks, the first one at 3645 cm - 1due to the presence of oh stretching andthe second one at 353 cm - 1 assigned to ca - or lattice vibrations (figure 11).