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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 2
11.
Hardening of cement occurs at
rapid rate during the first few days and afterwards it continues to increase at a decreased rate
slow rate during the first few days and afterwards it continues to increase at a rapid rate
uniform rate throughout its age
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Pick up the correct statement from the following:
Lime in excess, causes the cement to expand and disintegrate
Silica in excess, causes the cement to set slowly
Alumina in excess, reduces the strength of the cement
Magnesium oxide in excess, remains in free state and makes the cement unsound
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Batching error means inaccuracy in the quantity of
aggregates
cement
water
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Pick up the correct statement from the following i.
Higher workability indicates unexpected increase in the moisture content
Higher workability indicates deficiency of sand
If the concrete mix is dry, the slump is zero
Concrete mix having zero slump, is unsuitable for high strength.
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
You are asked to construct a massive dam, the type of cement you will use, is
ordinary Portland cement
rapid hardening cement
low heat cement
blast furnace slag cement
white cement.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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