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
Discussion:
14 comments Page 1 of 2.
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.
For high-workability mixes using fine aggregates, the limit can be as high as 20% of the total aggregate mass.
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)
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.
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.
Muzaffar said:
1 decade 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.
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.
Er. Soumya Choudhury said:
1 decade ago
Yeah exactly option B and C are countering each other. Any body please clarify.
Sapan Rijal said:
1 decade ago
Deleterious material is permitted only upto 5%. Isn't the dust deleterious one?
Mahesh Ramhari Bajabale said:
9 years ago
Silt content more than 10% in the sand is not allowed. According to IS code.
K.p.singh said:
1 decade ago
20% Dust mix & Proper gain strength for concrete.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers