Research and Application of Slag Activity Stimulation at Low Temperature

Aiming at the problem that slag has low hydration rate at low temperature, physical and chemical stimulation to slag are studied. The results show that, physical stimulation increases the slag reaction contact area, and effectively improves the slag hydration reaction rate. Chemical activator JFJ-1 can significantly promote the activity of slag and enhance the slag's compressive strength. The optimum adding amount of JFJ-1 is 5%. Under the condition of 10°C, the compressive strength of low density slag cement slurry develops much more fast for the use of JFJ-1 and the strength can reach 6.8 MPa in 24 h, 16.4 MPa in 48 h. Laboratory tests show that the low density slurries has no free fluid and good rheology.