Feb 26, 2016

Feb 26, 2016

Feb 26, 2016

# To Determine The Shrinkage Limit of Soil

/ On: Jul 29, 2017 /

## Apparatus

Shrinkage dish, electric oven, mercury, electric balance, sieve#40, spatula and containers.

## Procedure

• Take a soil sample passing through sieve#40 and add some amount of water in it to form a thick uniform paste.
• Take the shrinkage dish, weigh it, and put some of the soil mixture in it by spatula, fill it and again weigh it.
• Place the shrinkage dish in the oven for 24hours at 110-115C.
• Find the volume of the shrinkage dish using mercury this will be equal to the volume of the saturated soil sample.
• Take mercury in container and weigh it, put dry soil in it the mercury is displaced.
• Collect carefully the displace mercury and weigh it with great accuracy.
• The volume of dry soil is then determined by dividing the weight by the unit weight of mercury.
• The shrinkage limit is then calculated using the formula.

S.L = {{(w1-wd)-(v1-vd) γw}/ wd] x 100

Where,

W1 = M2-M1

WD = m3-M1

## Precautions

The displaced mercury should be carefully collected in order to get exact weight of mercury displaced.