Ceramics-Silikáty 46, (2) 63 - 67 (2002)

The effect of addition of superplasticizers on the hydration and pore structure characteristics of the hardened slag cement pastes was studied. Superplasticizers include some water soluble poly-condensates; these are Na-styrene sulphonate, Na-β- naphthol sulphonate formaldehyde and Na-phenol sulphonate formaldehyde condensates. The pastes were prepared using an initial water/cement ratio of 0.25 with poly-condensate content of 0.25 % by weight of the slag cement. The improvement of the mechanical properties of the superplasticized hardened slag cement pastes were presented and related as much as possible to the pore structure of the hardened pastes.