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Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 1 (Q.No. 16)
Concrete Technology
16.
The maximum amount of dust which may be permitted in aggregates is
5% of the total aggregates for low workability with a coarse grading
10% of the total aggregates for low workability with a fine grading
20% of the total aggregates for a mix having high workability with fine grading
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
13 comments Page 2 of 2.
Irshad Ahmad said:   6 years ago
By replacing sand with dust strength increases. We have performed this test in the lab. We replaced the sand with crusher dust and as we were increasing the percentage of dust the corresponding strength also increased.
(2)
Karan said:   4 years ago
Dust have increased shrinkage will be occur.
(1)
Ankit Chapagain said:   2 months ago
Dust has less permeability or leads to clogging, so it leads to a decrease in workability due to its sticky nature, too.
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