NDA2015General AbilityGeneral ScienceActual
Addition of gypsum to cement:
Options
- Areduces setting time to cement
- Bproduces very light colour cement
- Cincreases setting time of cement
- Dshining surface is formed
Correct answer
C. increases setting time of cement
Step-by-step solution
During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process. Gypsum is added to increase the "setting of cement".