This is why the reaction leads to the elimination of the excess of portlandite ( Ca ( OH ) 2 ) and brucite ( Mg ( OH ) 2 ), respectively, out of the silicate system, giving rise to the crystallization of both hydroxides as separate phases.
12.
Reaction 3 describes the hydration of olivine with water only to yield C-S-H ) phases formed along with portlandite ( Ca ( OH ) 2 ) in hardened Portland cement paste after the hydration of belite ( Ca 2 SiO 4 ), the artificial calcium equivalent of forsterite.
13.
Serpentine is stable at high pH in the presence of brucite like calcium silicate hydrate, ( C-S-H ) phases formed along with portlandite ( Ca ( OH ) 2 ) in hardened Portland cement paste after the hydration of belite ( Ca 2 SiO 4 ), the artificial calcium equivalent of forsterite.
