Calcium silicate hydrate— <i>in?situ</i> development of the silicate structure followed by infrared spectroscopy

In the current study, development of silicate structure synthetic calcium hydrates with different contents was followed by in-situ infrared (IR) spectroscopy and correlated to phase evaluated X-ray diffraction (XRD). A baseline correction method initially developed for diffractograms successfully adapted complex background fingerprint region in IR, which significantly contributed signal quality reproducibility. The separate bands could be monitored over 24 h reaction. These assigned oligomeric dimeric species based on their time stoichiometry-dependent development. It clearly shown that main peak overlooked literature. correlation time-dependent events XRD revealed changes unit cell hydrate are related polymerization. results were compared 29Si-MAS-NMR, highlighted benefits IR spectroscopy.