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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 5
6.
A concrete using an air entrained cement
has strength less than 10% to 15%
has more resistance to weathering
is more plastic and workable
is free from segregation and bleeding
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Pick up the correct statement from the following:
The maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm
The maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm
The material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt
The material having particles of size less than 0.002 mm, is known as clay
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Placing of concrete should preferably be done at a temperature of
0°C
10°C
20°C
23°C
27 ± 2°C
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The aggregate impact value of the aggregate used in
building concrete is less than 45
road pavement concrete is less than 30
runway concrete is less than 30
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The maximum percentage of chemical ingredient of cement is that of
magnesium oxide
iron oxide
aluminium
lime
silica.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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