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 1 of 2.

Sadulla Ahmed said: 1 decade ago

Option B & C saying that work-ability increases with the increase of dust. I have confusion in these two.

K.p.singh said: 1 decade ago

20% Dust mix & Proper gain strength for concrete.

Er. Soumya Choudhury said: 1 decade ago

Yeah exactly option B and C are countering each other. Any body please clarify.

Parveen kaushik said: 1 decade ago

Some confusion this concept no 3. Its not correct here 20% of dust all in aggregate not fine aggregate.

Sapan Rijal said: 10 years ago

Deleterious material is permitted only upto 5%. Isn't the dust deleterious one?

Muzaffar said: 10 years ago

In option B and C fine grading is there, so the dust is also a fine material. I think that may be the reason.

Mahi said: 8 years ago

Please anybody clarify this.

Mahesh Ramhari Bajabale said: 8 years ago

Silt content more than 10% in the sand is not allowed. According to IS code.

Ankit said: 8 years ago

Please anybody clarify the answer.

Aadarsh Devkate said: 7 years ago

No, provision is maximum 5% for all kinds.

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