|Sat Aug 11, 2012||Total posts : 1
| Topic: My Conrtactor has brought Sand that he claims is of good quality, and however on
My Conrtactor has brought Sand that he claims is of good quality, and however on sifting through i came across shells and immedieatly asked him if this is river sand or sea sand. However he confirms that this is river sand and he even shows me rounded pebbles that are in the sand.I am at a loss to explain how the shells could come, or is it possible that there are possible shells in the river sand too ?. Can anyone suggest me ?
|Tue Aug 14, 2012||Post #1|
|S L Gupta (Civil Engg)|
Join date: Mar 2008
Fine aggregate/ coarse sand consists of natural sand, crushed stone sand or crushed gravel stone dust. It should be hard, durable chemically inert, clean and free from organic matter, not containing any appreciable amount of clay balls or pellets and other harmful impurities i. e. alkaline, salt, mica, decayed vegetation, lumps etc.
It should be passed through I. S. Sieve 4.75 MM. It should have the finest modulus 2.50 to 3.50 and silt contents should not be more than 4%. Coarse sand should be either river sand or pit sand; or combination of the two.
Note; In general the sand particle should be coarser and have minimum silt contents. The silt contents should not be more than 4 %.
In my opinion shell may be in the river sand, which can be verified by you on the building material shope of your town or city.
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