Steel and Concrete in Construction

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What is the main difference in the manufacturing process between steel and concrete?

Steel manufacturing focuses on the quality of connections between members, while concrete manufacturing focuses on the quality of cement.

Steel is manufactured under controlled conditions in sophisticated plants, whereas concrete involves the purchase of raw materials and mix design. (correct)

Steel is manufactured with predetermined properties, whereas concrete relies on the expertise of the contractor and supplier for its quality.

Steel production involves the use of specified raw materials, while concrete production does not require specific raw materials.

What does the analogy 'Cement is to concrete what flour is to a cake' imply?

The mix design only determines the potential quality of concrete, similar to how a recipe determines the potential taste of a cake.

The contractor's expertise determines the final quality of concrete, similar to how the baker's skills affect the taste of a cake. (correct)

The raw materials like aggregates are crucial in determining concrete strength, similar to how various ingredients affect the taste of a cake.

The quality of cement determines the strength of concrete, similar to how the quality of flour affects the taste of a cake.

What is the role of the contractor and supplier in determining the actual quality of concrete?

They ensure that only high-quality cement and aggregates are purchased for concrete production.

They play a significant role in determining the actual quality of concrete in the finished structure. (correct)

They determine the potential strength properties of concrete through mix design.

They execute proper connections between individual concrete members.

Why is the quality of cement hardly the cause of faults in a concrete structure?

Because there are several concrete mixes that could be employed to produce concrete of the same strength properties. Signup and view all the answers

What is the matrix in a concrete mix?

The paste formed by cement and water Signup and view all the answers

What is the term for freshly mixed concrete before it sets and hardens?

Wet or green concrete Signup and view all the answers

What is the classification of concrete based on bulk density?

Lightweight (500-1800 kg/m3) Signup and view all the answers

What does a nominal mix refer to in the context of concrete?

Mix proportions specified by the proportions of different composing materials Signup and view all the answers

What is the defining criteria for good concrete?

Satisfactory in both the fresh and hardened states Signup and view all the answers

What is the term for concrete placed at the site where it will be used?

In-situ concrete Signup and view all the answers

What makes concrete an ideal material for building structures to control, store, and transport water?

Excellent resistance to water Signup and view all the answers

Which property of concrete allows it to maintain structural integrity in a fire for 6-8 hours?

Fire resistant Signup and view all the answers

What property of concrete allows it to store considerable quantities of heat from the environment?

Energy efficient Signup and view all the answers

What feature offsets some of the other disadvantages of concrete?

Ability to consume waste Signup and view all the answers

Why does concrete need to be reinforced with steel?

To carry the tensile stresses Signup and view all the answers

What is the primary function of cement in civil engineering works?

To bond the aggregate particles together Signup and view all the answers

What is the purpose of the kiln phase in cement production?

To produce clinker from the raw mix Signup and view all the answers

What is a disadvantage of using formwork in concrete construction?

It is labor intensive and time consuming Signup and view all the answers

Why has the Dry Process gained popularity in the manufacture of cement?

It requires lower energy consumption and is more environment-friendly Signup and view all the answers

How does concrete provide protection to steel against corrosion?

By acting as a physical barrier to the ingress of aggressive species Signup and view all the answers