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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 Signup and view all the answers

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

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

What is the primary purpose of gypsum in cement?

To control hydration and setting time Signup and view all the answers

What happens when cement is mixed with impure water?

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

What is the primary function of lime in cement?

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

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

The hydration process Signup and view all the answers