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Understanding Concrete as a Building Material

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Understanding Concrete as a Building Material

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Questions and Answers

What is concrete?

A compound constituting about one-quarter of the volume of portland cement.

A hydraulic cement made by burning a mixture of clay and limestone in a rotary kiln.

An artificial, stonelike building material made by mixing cement and various mineral aggregates with sufficient water. (correct)

A compound constituting about half the volume of portland cement.

What is portland cement named after?

Isle of France

Isle of Portland, England (correct)

Isle of Spain

Isle of Italy

What does tricalcium silicate constitute in portland cement?

Half the volume (correct)

One-quarter of the volume

One-tenth of the volume

None of the above

What is the function of tricalcium aluminate in portland cement?

Initial setting of the cement Signup and view all the answers

Which raw material is NOT listed as a component used to make concrete?

Copper ore Signup and view all the answers

What is the difference between concrete and portland cement?

Composition Signup and view all the answers

What is the purpose of adding gypsum to clinker?

To slow down the setting time Signup and view all the answers

Which type of portland cement is used when resistance to moderate sulfate action is required?

Type II Signup and view all the answers

What distinguishes Type III portland cement from other types?

Fast curing and early strength gain Signup and view all the answers

When is Type IV portland cement typically used?

In the construction of massive concrete structures Signup and view all the answers

What is the defining characteristic of air-entraining portland cement?

Addition of an air-entraining agent Signup and view all the answers

Why is white portland cement used in precast concrete work?

To counteract iron oxide and manganese oxide Signup and view all the answers