Answer the following questions.

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3. Answer the following questions.

A

1. Is glass a new building material?

2. What is glass made of?

3. What sort of equipment is necessary for producing glass?

4. When was glass brick invented?

5. Where is glass used in modern construction?

B

1.What is plastic and what is this material usually derived from?

2. What is the most common property for all types of plastics?

3. Where are plastics applied in modern construction?

4. What are the main advantages of plastics as a building material?

5. Can plastic displace traditional building materials in future? How can you prove your opinion?

READING FOR TEST “BUILDING MATERIALS”

1. Translate the text without using the dictionary.

THE OPTIONS OF USING TIMBER,

CONCRETE AND STEEL

There are three of the most common building materials in the world: steel, concrete, timber.

STEEL

Steel products are ones of the most widely used building materials in construction today, mainly because they are diverse, durable, and available, and no matter what kind of project you are working at.

Steel as a structural material has a high strength/weight proportion; the dead weight (собственный вес) of steel structures is relatively small. This property makes steel a very attractive structural material for:

· high-rise buildings;

· long-span bridges;

· structures located on soft ground.

Ductility. Steel can undergo large plastic deformation beforefailure, thus providing a large reserve strength. This property is referred to as ductility. Properly designed steel structures can have high ductility, which is an important characteristic for resisting shock loading such as blasts (взрыв) or earthquakes. A ductile structure has energy-absorbing capacity and it will not be suddenly collapsed. It usually shows large visible deflections (прогиб, отклонение) before failure or collapse.

Properties of steel can be predicted with a high degree of certainty. Steel in fact shows elastic behavior up to a relatively high and usually well-defined stress level. Steel properties do not change considerably with time.

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