Fig. 11: Changes in Si polymerization in tobermorite due to carbonation in different initial pH environments.

29Si NMR spectra of tobermorite a before exposure, b after carbonation with initial pH of 9, and c after carbonation with initial pH of 13.

29Si NMR spectra of tobermorite a before exposure, b after carbonation with initial pH of 9, and c after carbonation with initial pH of 13.