STANDARD
- IS :2720 (Part2) 1973
OBJECTIVE
- To determine water content of soils.
APPARATUS
- Air tight containers.
- Balance of capacity 2 kg and sensitivity 0.01 gram.
- Thermostatically controlled oven of capacity 250 °C.
PROCEDURE
- Take a representative sample of soil from soil mass.
- The quantity of soil sample for the purpose shall be as given in Table: 2.2.1.
Table: Minimum quantity of soil sample to be taken for the test
| Size of particle more than 90% passing IS sieve |
Minimum quantity of soil sample to be taken in grams |
| 425 microns | 25 |
| 2.00 mm | 50 |
| 4.75 mm | 200 |
| 10.00 mm | 300 |
| 20.00 mm | 500 |
| 40.00 mm | 1000 |
- Clean the container, dry and weigh with lid (W1).
- Take required quantity of soil sample in to the container crumble and place loosely, and weigh (W2) with lid.
- Place the container in the oven with lid removed and maintain the temperature of oven at 110±5˚C for a period of 24 ± 1/2 hours .
- After the specified period, remove the container with the sample from the oven, replace the lid and cool it in a desiccators.
CALCULATIONS
Water content, (%) =
((W2-W3)/ (W3-W1)) x 100
W1= = Weight of container with lid.
W2 =Weight of container with lid and wet soil.
W3= Weight of container with lid and dry soil.
DETERMINATION OF WATER CONTENT
IS:2720 (Part 2) 1973
| Description |
Units |
Test 1 | Test 2 |
| Container No. |
– |
||
| Weight of container (W1) |
gms |
||
| Weight of container + wet soil(W2) |
gms |
||
| Weight of container + dry soil (W3) |
gms |
||
| Weight of water ( W2- W3) |
gms |
||
| Weight of dry soil (W3- – W1) |
gms |
||
| Water Content (((W2 – W3)/(W3-W1))x100 |
% |
||
| Average Water Content |
% |
||
REPORT
- Report the individual and the mean results to the nearest second decimal.