Современные проблемы промышленного и гражданского строительства на занятиях английского языка. Кузьмина Е.В. - 33 стр.

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reinforcement otherwise spalling will occur, i.e. the breaking off of pieces of

concrete below the reinforcement. For heavily reinforced sections, e.g. the ribs

of main beams, the maximum size of the coarse aggregate should be either:

(I) 5 mm less than the minimum horizontal distance between the reinforcing

rods, or,

(II) 5 mm less than the minimum cover to the reinforcement, whichever is

the smaller.

Now say whether these statements are true or false. Correct the false statements.

a) Concrete is made from three different materials.

b) Coarse aggregate ranges in size from 20 mm to 40 mm.

c) Then the minimum thickness of the finished concrete is 100 mm, the

maximum size of aggregate should not be greater than 25 mm.

d) When the reinforcing rods are close together, the maximum size of aggregate

used should be 10 mm.

e) Cover is the thickness of concrete between the reinforcing rods.

f) The reinforcing rods are placed near the bottom of the rib of a concrete beam.

g) Spalling can occur in a solid concrete slab when the cover to the

reinforcement is greater than the maximum size of the coarse aggregate.

h) Then the minimum horizontal distance between reinforcing rods is 15 mm,

the maximum size of aggregate should be less than 12 mm.

9. Discussion: Your ideas about the material.