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Building Materials: Bricks and Masonry Blocks

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Questions and Answers

What is the name of the compound formed within 24 hours of adding water to cement?

Tetra Calcium Alumino Ferrate
Calcium Silicate Hydrate
Calcium Hydroxide
Tri-Calcium Aluminate (correct)

What is the significance of the hydration reaction in Portland cement?

It slows down the setting time of cement
It determines the color of the cement
It affects the workability of concrete
It strengthens the concrete over time (correct)

What is the primary function of C4AF in Portland cement?

Provides color to the cement
Increases the strength of cement
Contributes to early setting of cement
All of the above (correct)

What is the result of the hydration reaction between cement and water?

Formation of hydration products (C) Signup and view all the answers

What is the role of water in the hydration process of Portland cement?

It triggers the hydration reaction (D) Signup and view all the answers

What are the two primary compounds formed during the hydration of Portland cement?

C3A and C4AF (A) Signup and view all the answers

What is the significance of Tri-Calcium Aluminate (C3A) in Portland cement?

It contributes to the early setting of cement (B) Signup and view all the answers

What is the effect of C4AF on the strength of cement?

It increases the strength of cement over time (B) Signup and view all the answers

What is the result of the hydration reaction on the workability of concrete?

It decreases the workability of concrete (D) Signup and view all the answers

What determines the proportions of C3A and C4AF in Portland cement?

All of the above (D) Signup and view all the answers

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