FREE SWELL INDEX TEST OF SOIL(IS-2720-PART-40-1970)

Uses OF Free swell index test

To determine free swell index of nature soil

Reference Standard

FREE SWELL INDEX TEST OF SOIL (IS-2720-PART-40-1970)

The apparatus used

i) IS Sieve of size 425┬Ám

ii) Oven

iii) Working Balance, with an accuracy of 0.01g

iv) 100ml capacity Graduated glass cylinder- 2 nos.,

FSI test Procedure

  • Take two sample of 10g oven dried soil specimens, it must be passing through 425 micron Sieve
    sieve.
  • Put each soil sample into one of the two 100 ml glass graduated cylinders.
  • Fill one cylinder with kerosene oil & another cylinder with Distilled water up to the 100
    ml mark.
  • After eliminating trapped air (through gentle shaking or stirring with a glass rod), permit the sediments in both the cylinders to settle.
  • Ensure that the suspension reaches a state of equilibrium, maintaining it for a minimum of 24 hours.
  • The volume of soil in each cylinder must be measured at the end.
FREE SWELL INDEX TEST OF SOIL(IS-2720-PART-40-1970)

Calculations Of FSI Test

The free swell index of the soil is Can be calculatedby using The Following Formula :

Free swell Index, percent = [(Vd-Vk)/Vk] x100 
Where

Vd = The volume of soil specimen read from the graduated cylinder containing distilled water.

Vk = The volume of soil specimen read from the graduated cylinder containing kerosene
FREE SWELL INDEX TEST OF SOIL(IS-2720-PART-40-1970)

Format Book :-

FREE SWELL INDEX TEST OF SOIL(IS-2720-PART-40-1970)

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