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Cement Properties and Hydration

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Questions and Answers

What is the primary function of silica in cement?

To lower the clinkering temperature
To form dicalcium and tricalcium silicate, which gives strength to the cement (correct)
To impart colour and hardness to the cement
To increase the initial setting time of cement

Which of the following is a characteristic of the dry process of cement manufacturing?

Easy control of raw material mixing
Low fuel consumption and smaller kiln size (correct)
Low capital cost
High fuel consumption

What is the role of calcium sulphate in cement?

To increase the strength of cement
To impart colour to the cement
To decrease the initial setting time of cement
To increase the initial setting time of cement (correct)

Which ingredient is present in small amounts in cement and imparts hardness and colour?

Magnesium (A) Signup and view all the answers

What is the main advantage of the wet process of cement manufacturing?

Easy control of raw material mixing (D) Signup and view all the answers

What is the primary purpose of gypsum in cement?

To control hydration and setting time (D) Signup and view all the answers

What happens when cement is mixed with impure water?

The cement is compromised and loses its strength (A) Signup and view all the answers

What is the term used to describe the ability of cement to be moved and placed once it has been mixed?

Mobility (C) Signup and view all the answers

What is the primary function of lime in cement?

To make the cement sound and provide strength (B) Signup and view all the answers

What determines the strength of cement in the final concrete product?

The hydration process (A) Signup and view all the answers