Items/ index P. O 42.5 P. O 42.5r Cement mgo (%) 5.0 4.0 5.0 4.0 Cement so3 (%) 3.5 3.0 3.5 3.0 Cement loss on ignition (%) 5.0 4.0 5.0 4.0 Cement fineness (%) 10.0 4.0 10.0 4.0 Setting time (min)Initial setting time ,45 ,60 ,45 ,60 Final setting time 600 270 600 270 Soundness Qualified Qualified Qualified Qualified Strength 50kgs per bag