Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 1 (Q.No. 16)
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:
14 comments Page 2 of 2.

Ankit said:   8 years ago
Please anybody clarify the answer.

Aadarsh Devkate said:   8 years ago
No, provision is maximum 5% for all kinds.

Ankit Chapagain said:   7 months ago
Dust has less permeability or leads to clogging, so it leads to a decrease in workability due to its sticky nature, too.

Rohan Roy said:   1 month ago
The maximum permissible dust content in aggregates is generally 5% for coarse aggregates and up to 10% for fine aggregates in low-workability mixes, according to standard construction specifications.

For high-workability mixes using fine aggregates, the limit can be as high as 20% of the total aggregate mass.


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