These pigs are broken up and ground to required finess . The fineness of grinding of this cement is to 8 to 10 percent higher than that of ordinary cement . This cement is very dark in colour , almost black powder . in this cement setting time is controlled by the rate of cooling of the fused product and not by adding gypsum . Following are the special characteristics of this cement :
- Its initial setting time is 3 to 6 hours and finals etting takes palce within 2 hours of the initial setting . .
- Due to high percentage of aluminates being present this cement develops stength very fast . In 24 hours it develops as muich strength as an ordinay
No comments:
Post a Comment