Text-based exercises. Ex.6. Say which of the following issues are considered in the text

Ex.6. Say which of the following issues are considered in the text. If they are, say to which paragraphs they belong.

- advantages of blockwork,

- advantages of engineering bricks,

- bricks for external and internal use,

- comparison of brick classes,

- functions of the external walls,

- kinds of brick suitable for facing,

- practical values of different bricks,

- production and use calcium silicate brick,

- production of concrete bricks,

- requirements for loadbearing walls,

- sizes of concrete bricks,

- the components of brick.

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Ex. 7. Arrange the sentences in the logical sequence of the text above.

a) Blockwork has cost advantages over brickwork.

b) By varying the quantity of cement and the nature of the aggregate, blocks with different strengths and levels of insulation can be formed.

c) Calcium silicate bricks are made from sand or crushed flint and lime.

d) Class F2 bricks may be saturated and undergo repeated cycles of freezing and thawing.

e) Class FO bricks are suitable for internal use only.

f) Concrete bricks are a mixture of dense aggregate with a cementitious binder.

g) Different proportions of cement can produce bricks of various strengths.

h) Concrete bricks when mixed with crushed stone aggregate are a substitute for natural stone.

i) Engineering bricks are dense, with high compressive strength and low rates of water absorption.

j) Hardening leads to a chemical reaction occurs to produce hydrated calcium silicate.

k) Calcium silicate bricks are resistant to frost attack and are unaffected by soluble sulfates.

l) Some bricks are totally resistant to frost attack while others are quite vulnerable.

m) Bricks for passive exposure are classified FO.

n) The majority of bricks are made from clay.

o) The most common use of facing bricks is for the outside walls of houses;

p) There are a number of requirements for an external loadbearing wall.

Ex.8. Divide the main part of the text into logically complete units. Find the key sentence in all the structurally meaningful passages of the text:

1.

2.

3.

4. …

Ex.9. Choose a sentence (two or three?) to elicit the main idea for each of the parts of the text.

Ex. 10. Text 1 has no conclusion. Suggest one or more sentences to conclude the description of the building material under consideration.

Ex. 11. Give summary of the text. For each of the parts give the key statement and support it with the chosen additional information. Remember that the summary should be accompanied by an introduction and conclusion.