Effect of sodium lignosulfonate superplasticizer on the early hydration of cement with different contents of cubic C3A

Abstract

In this research, the influence of the sodium lignosulfonate superplasticizer (LS) on the early hydration of two types of cements containing different amount of cubic C3A was studied. It is shown that at 0.1% addition of LS has no significant influence on the hydration, while at higher dosages LS contributes to the additional formation of ettringite. This phenomenon is observed for both types of cement. The higher ettringite formation was found for the cement containing higher C3A amount. However, LS addition retards the hydration, which is indicated by the reduction of the portlandite amount formed.