S. No. Concentration of metal ion (ppm) IST FST
1 10 175 300
2 50 175 300
3 100 175 300
4 500 180 300
5 1000 190 310
6 2000 190 310
7 5000 205 330
8 7000 205 335
9 8000 205 335
10 10000 205 335
IST- Initial setting time of cement in min
FST- Final setting time of cement in min
Table 4: Effect of fixation of nickel ions on initial and final setting time of cement.