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Cement Chemistry and Hydration

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Questions and Answers

What is a characteristic of high alumina cement?

It is highly reactive and produces high early strength (correct)

It has low early strength

It is not reactive at all

It is not suitable for mass concrete

What is the purpose of selecting a specific type of cement?

To match the requirements of the construction project (correct)

To reduce the speed of construction

To reduce the strength of the concrete

To increase the cost of the project

What is mass concrete?

Any volume of concrete with small dimensions

Any volume of concrete with dimensions large enough to require measures to cope with heat generation (correct)

Any volume of concrete with large dimensions

Any volume of concrete with dimensions small enough to require measures to cope with heat generation

Why is it important to consider the environmental conditions when selecting a type of cement?

Because some cements can restrain heat and some cannot Signup and view all the answers

What is the purpose of field testing of cement?

To ensure the cement is suitable for minor works Signup and view all the answers

What should you look for when visually inspecting a bag of cement?

No lumps and a greenish grey color Signup and view all the answers

What should you feel when thrusting your hand into a bag of cement?

A cool feeling Signup and view all the answers

What is the texture of cement when felt between the fingers?

Smooth Signup and view all the answers

Why is it important to select a type of cement that hardens quickly?

Because some parts of the construction need to be completed quickly Signup and view all the answers

What is the relationship between the type of cement and the temperature?

Some cements can withstand high temperatures and some cannot Signup and view all the answers