Ca(OH)2 is one of the main products of C3S hydration, along
with C–S–H. It is well recognized that Ca(OH)2 plays an important
role in buffering the pH and protecting reinforcement of the
cement-based materials. The determination of the change in Ca
(OH)2 phase during cement hydration represents one of the way to
trace the development of the hydration process. Although
systematic work has been done on the hydration kinetics of C3S
as well as on C–S–H microstructure [12,14,15], the formation of Ca
(OH)2 during C3S hydration and morphology change of Ca(OH)2 in
the presence of PC is poorly investigated. In this study, pure C3S
phase was synthesized and the interaction between C3S and PC
were carefully studied. Calorimetry, differential thermal analysis
(DTA), X-ray diffraction (XRD), and fourier transform infrared (FTIR)
spectroscopic were applied to monitor the kinetics of the
hydration products. Gel permeation chromatography (GPC) was
used to determine the amount of PC adsorbed on C3S as a function
of time. Moreover, the morphological change of Ca(OH)2 crystals
upon PC addition was investigated in the current research.