C₃S hydration in diluted and stirred suspension: (II) properties of C—S—H precipitated during the two kinetic steps Available to Purchase

The properties of C—S—H formed during the two kinetic steps have been investigated by hydrating mixtures of C₃S and C—S—H, in water or saturated lime solutions. C—S—H precipitated during the two kinetic steps (C—S—H(SI) and C—S—H(SII)) have different properties concerning the nucleation rate and the formation of a protective layer around C₃S grains. C—S—H(SI) is able to transform into C—S—H(SII) by increasing its C/S ratio when the lime concentration becomes higher than 20 mmol/l. Thus, C—S—H(SI) and C—S—H(SII) may correspond to two different types of C—S—H.