• Three major solid components of hydrated cement paste are: Calcium Silicate
Hydrate (CSH), Calcium Hydroxide crystals (CH or portlandite) and Calcium
Sulfo-Aluminates (CS or ettringite). CSH occupies about 50 to 60 percent of the
volume where as CH and CS occupies 20 to 25 percent and 15 to 20 percent
respectively.