Get Shrink-swell Index Database For Melbourne

Connect the system to a water reservoir with the level of water in the reservoir being at about the same level as the soil specimen and allow water to flow in the sample. Then allow the soil to swell. Record the free swell readings shown by the dial gauge under the seating load at different time intervals.

The shrink–swell index of clay refers to the extent certain clay minerals will expand when wet and retract when dry. Soil with a high shrink–swell capacity is problematic and is known as shrink–swell soil, or expansive soil.

Test method ASTM- D5890 is used to determine the swell index. A 2g sample of dried and finely ground bentonite clay is dispersed into a 100 ml graduated cylinder in 0.1g increments. A minimum of 10 minutes must pass between additions to allow for full hydration and settlement of the clay to the bottom of the cylinder.

Free Swell Test 40 (425 μm) sieve into a graduated cylinder filled with water and measuring the swollen volume after it has settled completely. The ratio of the change in volume from the dry to the wet condition over the initial volume, expressed as a percentage, is used to calculate the free swell of the soil.

Free Swell Test 40 (425 μm) sieve into a graduated cylinder filled with water and measuring the swollen volume after it has settled completely. The ratio of the change in volume from the dry to the wet condition over the initial volume, expressed as a percentage, is used to calculate the free swell of the soil.

The general concept of a swell test is to take an initial reservoir fluid and mix an injection fluid (typically a relevant injection gas) to estimate the miscibility effects of the given injection fluid with the reservoir fluid. Normally the results are given in a swell test plot (see Figure 1).

i) Take two specimens of 10g each of pulverised soil passing through 425µm IS Sieve and oven-dry. ii) Pour each soil specimen into a graduated glass cylinder of 100ml capacity. iii) Pour distilled water in one and kerosene oil in the other cylinder upto 100ml mark.