According to IS 8041 - 1990, the minimum specific surface area (by Blaine's air permeability method) required for rapid hardening Portland cement is:

According to IS 8041 - 1990, the minimum specific surface area (by Bla

1.	According to IS 8041 - 1990, the minimum specific surface area (by Blaine's air permeability method) required for rapid hardening Portland cement is:
A.	3250 cm2/g
B.	3200 cm2/g
C.	3500 cm2/g
D.	2250 cm2/g
Answer» B. 3200 cm2/g