Enlist field identification test on soil and explain dilatency test.

Enlist field identification test on soil and explain dilatency test.
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1 Answer

Answer :

Field Identification test on soil:-

1) Dry Strength Test

2) Dilatency Test

3) Toughness Test

4) Organic content and colour test

5) Visual examination.

6) Other identification test.

Dilatency test :

i) This is simple test for fine fractions of soil

ii) Dilatency means reaction to shaking. About 5 cc soil sample is taken and enough water is added to nearly saturate it.

iii) The pat of soil is placed in the open palm of the hand and shaken horizontally by striking vigorously against the other hand several times. The pat is then squeezed between the fingers.

iv) The appearance and disappearance of water with shaking and squeezing is called a positive reaction. This reaction is called quick, if water appears and disappears rapidly, slow if water appears and disappears slowly and no reaction if water condition does not appear to change.

v) The type of reaction is observed and recorded. Inorganic silts show a quick reaction where as clays shows no reaction or slow reaction.
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