Answer / aditya richie

we need to find fineness modulus of sand . By calculating
fineness modulus we will come to know whether sand belongs
to grade 1 , grade 2 or grade 3. grade 1 sand is best
quality .

Answer / m. velmohan

by conducting simple site tests such as size (through
visible and sieve analysis), colour, water absorbsion and
bulkage etc.,

Answer / er. munesh natrrajan[m.d. of

The following methods are used to check the quality of sand.

1. Sand should not contain any appreciable amount of clay
balls and harmful impurities such as alkalis, salts, coal,
decayed vegetation etc. The silt contents should not exceed 4%.

2. To check the quality of fine aggregates or sand; put
some quantity of sand in a glass of water. Then it is
vigorously shaken and allowed to settle. If the clay is
present in sand, its distinct layer is formed at the top of
sand.

3. To detect the presence of organic impurities in sand, a
solution of sodium hydroxide or caustic soda is added to
sand and stirred. If the color of solution changes into
brown, it shows presence of impurities.

Answer / ajay

thumb rule for finding steel qty per m2 of area

Answer / chinnu

sieve analysis,density...................................

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