Fig. 1
From: Carbonation of Portland Cement Studied by Diffuse Reflection Fourier Transform Infrared Spectroscopy
DR-FTIR spectra of (a) unhydrated cement exposed to ambient air for 10 min. (b) unhydrated cement exposed to ambient air for 19 days. (c) Cement hydrated for 8 h and then exposed to ambient air for 10 min. (d) Cement hydrated for 8 h and then exposed to ambient air for 19 days. The assignments and characterizations of the peaks and bands, marked with I–X in the spectra, are presented in Table 1.