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Civil Engineering - Concrete Technology

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Exercise : Concrete Technology - Section 1
1.
For quality control of Portland cement, the test essentially done is
setting time
soundness
tensile strength
consistency
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,
20%
25%
30%
35%
40%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Under normal conditions using an ordinary cement, the period of removal of the form work, is :
7 days for beam soffits
14 days for bottom slabs of spans 4.6 m and more
21 days for bottom beams over 6 m spans
2 days for vertical sides of columns
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is
extremely low
very low
low
high
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
For given water content, workability decreases if the concrete aggregates contain an excess of
thin particles
flat particles
elongated particles
flaky paticles
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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