2022 Volume 76 Issue 1 Pages 68-75
In this study, the hydration reaction of cement pastes using sludge water as mixing water, with or without the addition of sodium gluconate, was investigated. And we also discussed the effect of sludge water on setting and initial strength development properties of concrete with sludge water added from the point of cement chemistry view. The results confirmed that the addition of sludge water, with or without sodium gluconate, promoted hydration of the alite and increased CH production compared to the case without sludge water. It was also suggested that the addition of sludge water may have produced C-S-H with a low C/S ratio. This accelerated hydration of the alite and changes in the composition of the hydrates may affect the setting and initial strength development properties of concrete with sludge water added.
