UltraTech Cement Technical Executive Interview Questions, Process, and Tips

OPC cement is Ordinary Portland Cement, while PPC cement is Portland Pozzolana Cement. The main difference lies in the materials used and their properties.

• OPC cement is made by grinding clinker with gypsum, while PPC cement is made by intergrinding clinker, fly ash, and gypsum.

• PPC cement has higher long-term strength and durability compared to OPC cement.

• PPC cement is more environmentally friendly as it uses industrial...read more

Tests of cement are used to ensure its quality and strength for construction purposes.

• Setting time test: Determines how long it takes for the cement to set.

• Compressive strength test: Measures the maximum load the cement can bear before failure.

• Soundness test: Checks for the presence of uncombined lime in the cement.

• Fineness test: Determines the particle size of the cement.

• Consistency test: Measures the amount of water ...read more

Cement is made by heating limestone with clay in a kiln, then grinding the mixture into a fine powder.

• Limestone and clay are crushed and mixed in proper proportions

• The mixture is then heated in a kiln at high temperatures

• After heating, the material is cooled and ground into a fine powder

• The powder is then mixed with gypsum to regulate setting time

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

Slump test is done to measure the workability of concrete. The mould is removed after 15-30 minutes.

• Slump test is done to determine the consistency and workability of fresh concrete.

• The mould is typically removed after 15-30 minutes of the test being conducted.

• The test helps in ensuring that the concrete mix has the desired properties for construction.