08-08-2014, 10:47 AM
BFSC : Portland blast furnace slag cement
This type of cement constitutes about 10% of cement produced in India. The slag forms 25-60% of the cement.
Every ton of cast iron produce 0.3 tons of furnace slag which can be used in cement industry. During its setting the Ca(OH)2 liberated by OPC hydration acts as an activator for the slag.
Even though it is equated with OPC it behaves more like PPC and has lower heat of hydration and better sulphate resistance.
At present BFSC produced in India is only Grade-33 and there are proposals to make Grade-43 cements with 45-70% slag content. BFSC with more than 50% slag has good sulphates resistance.
This type of cement constitutes about 10% of cement produced in India. The slag forms 25-60% of the cement.
Every ton of cast iron produce 0.3 tons of furnace slag which can be used in cement industry. During its setting the Ca(OH)2 liberated by OPC hydration acts as an activator for the slag.
Even though it is equated with OPC it behaves more like PPC and has lower heat of hydration and better sulphate resistance.
At present BFSC produced in India is only Grade-33 and there are proposals to make Grade-43 cements with 45-70% slag content. BFSC with more than 50% slag has good sulphates resistance.