Ambuja Cements Technical Sales Engineer Interview Questions and Answers

Specific gravity of cement is around 3.15 to 3.19.

• Specific gravity of cement typically ranges from 3.15 to 3.19.

• It is an important property of cement that helps in determining its quality and strength.

• Specific gravity is the ratio of the density of a substance to the density of a reference substance (usually water).

The density of cement is typically around 1440 kg/m^3.

• The density of cement can vary slightly depending on the type and brand.

• Common densities for cement range from 1300 to 1600 kg/m^3.

• Density is usually measured in kilograms per cubic meter (kg/m^3).

Types of cement include Portland cement, white cement, rapid hardening cement, and low heat cement.

• Portland cement is the most common type used in construction

• White cement is used for architectural purposes and to create colored concrete

• Rapid hardening cement sets quickly and is used in projects with tight deadlines

• Low heat cement generates less heat during hydration and is used in large concrete structures

The raw materials required for cement are limestone, clay, gypsum, and iron ore. The proportions vary depending on the type of cement being produced.

• Limestone is the primary raw material for cement production, typically making up around 80% of the total ingredients.

• Clay is another key ingredient, providing the necessary silicon, aluminum, and iron.

• Gypsum is added to control the setting time of the cement.

• Iron ore is us...read more

OPC Cement is Ordinary Portland Cement, while PPC Cement is Portland Pozzolana Cement.

• OPC Cement is made by grinding clinker with gypsum, while PPC Cement is made by inter-grinding clinker, fly ash, and gypsum.

• OPC Cement has higher strength and faster initial setting time compared to PPC Cement.

• PPC Cement has better workability and is more resistant to aggressive chemicals than OPC Cement.