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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 1
26.
To ensure constant moisture content in aggregates
area of each aggregate pile should be large
height of each aggregate pile should not exceed 1.50 m
aggregate pile should be left for 24 hours before aggregates are used
conical heaps of aggregates should be avoided to prevent moisture variation
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Workability improved by adding
air-entraining agent
foaming agent
oily-agent
aluminium compound
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The commonly used material in the manufacture of cement is
sand stone
slate
lime stone
graphite.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is
7.30
7.35
7.40
7.45
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Curing a concrete for long period ensures better
volume stability
strength
water resistance
water tightness and durability
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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