Portland slag Cement (IS: 455: 1989)

• Made by intergrading Portland cement clinker, (≮35%) and granulated blast furnace 

slag and gypsum.

• Slag contains oxide of lime, silica and alumina.

• Slag content in the cement varies between 25 to 65 per cent of the total mass of 

mixture.

• Expansion of the cement should not be more than 10 min and 0.8 per cent.

• Initial and Final setting times for 33 grade OPC.

• Due to its low heat of hydration it can also be used for mass concreting, e.g., dams, 

foundations, etc.

Super Sulphated Portland Cement (IS : 6909)

• 80 to 85% of granulated slag with 10 to 15% of calcium sulphate 5% of Portland 

cement clinker to.

• In this cement C3A, which is susceptible to sulphates is limited to less than 3.5%.

• Used in place with temperature is below 400C.

• It is useful for mass concrete work.

• Fineness of 400 m2

/kg.

• Expansion ≤ 5mm.

• Initial setting time ≥ 30 minutes, setting time ≤ 600 minutes.

• Is highly resistant to seawater.