Soil grading 1

[Geokhan]

Is it possible for a natural material to pass safely through #200 sieve in dry condition..i mean is there any posibility for a #200 sieve retain particle to break down during shaking process and pass through.if yes then why we use it in civil lab for grading

 

[dik]

I would think it is very unlikely for that fine a soil to pass easily due to electrostatic reasons and likely other reasons.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[PEinc]

Some natural soil materials can easily pass through the U.S. or British No. 200 (0.074 mm) sieve without needing to be broken down. Soils that pass the No. 200 sieve are considered to be fines, which include silts and clays.

http://www.PeirceEngineering.com

 

[Ron]

The amount passing a #200 sieve is determined by wet sieving, not dry. After the #200 sieve amount is determined, the remainder of the sample is dry sieved....yes, you will get a small amount that again passes the #200 sieve from abrasion of the larger particles, but that is usually insignificant

 

[dik]

Thanks, guy... my understanding...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[PEinc]

No. 200 sieves are available but may not be commonly used. Ron's comment is more commonly found in references and, probably, in practice.

https://www.globalgilson.com/8-inch...L8z-4ooWlEA6CvR8Wk0GJnEgezInGAzRoCfr4QAvD_BwE

http://www.PeirceEngineering.com

 

[morecoffeeplz]

No. 200 sieves are essential to USCS soil classification therefore quite commonly used. As Ron stated, wet sieving is the optimal method to determine %passing .075 mm.