Dalmia-OCL Junior Technical Officer Interview Questions and Answers

There are several types of cement available in the market.

• Ordinary Portland Cement (OPC)

• Portland Pozzolana Cement (PPC)

• White Cement

• Rapid Hardening Cement

• Low Heat Cement

• Sulfate Resistant Cement

• Oil Well Cement

• Blast Furnace Slag Cement

• Air Entraining Cement

IS code for PSC cement is IS 455:1989

• IS 455:1989 is the Indian Standard code for Portland Slag Cement

• PSC cement is made by blending Portland cement clinker with granulated blast furnace slag

• It has high durability, strength, and resistance to chemical attacks

• PSC cement is commonly used in construction of dams, bridges, and marine structures

M25 is a concrete mix design ratio and properties refer to the characteristics of a material.

• M25 is a concrete mix design ratio that specifies the proportion of cement, sand, and aggregate.

• Properties of a material refer to its characteristics such as strength, durability, and workability.

• Concrete properties include compressive strength, tensile strength, and water absorption.

• Understanding the properties of a material is important for selecting the right material for a specifi...read more

Cement is made by heating limestone with small amounts of other materials.

• Raw materials are crushed and mixed in the correct proportions

• The mixture is heated in a kiln to around 1450 degrees Celsius

• The resulting material, called clinker, is ground into a fine powder

• Gypsum is added to the powder to regulate setting time

• The final product is cement, which is used in construction

PSC cement stands for Portland Slag Cement, a type of cement made by mixing slag and ordinary Portland cement.

• PSC cement is known for its high durability and strength.

• It is commonly used in construction projects such as bridges, dams, and buildings.

• The slag used in PSC cement is a byproduct of steel production.

• PSC cement has a lower heat of hydration compared to other types of cement, making it ideal for mass concrete structures.

• It is also more resistant to chemical attacks a...read more