Water Content Determination | Procedure | Formula | Apparatus

Water Content is defined as the ratio of the mass of water to the mass of solids. In oven drying method the soil is subjected to 105°-110°C for about 24 hours

Objective:

To determine the water content of given soil by oven-drying method.

Theory:

Water Content is defined as the ratio of the mass of water to the mass of solids.

In oven drying method the soil is subjected to 105°-110°C for about 24 hours (For peat

and soil containing organic matter a drying temperature of 60°C is to be preferred to

avoid oxidation of the organic content). This method covers the determination of water

content of the oven dry weight.

Apparatus

1. Thermostatically controlled oven (capable of maintaining a temperature of 105°-

110°C, and adjustable to a lower temperature 60°C if necessary)

2. Weighing balance (with an accuracy of 0.01 g for fine-grained soils)

3. Desiccators ( Use of desiccators can be avoided if cans with airtight lids are used)

4. Cans

Note: The soil specimen taken shall be representative of the soil mass. The size of the

specimen selected depends upon the quantity required for good representation, which is

influenced by the gradation and the maximum size of particles, and on the accuracy of

weighing. The following quantities are recommended for general laboratory use.

Procedure

1. Note the can number and take the empty mass of moisture cans.

2. Take three samples of about 20-25 g of the soil in moisture can.

3. Find the mass of cans with the soil correct to 0.01g.

4. Keep the cans for drying in oven, with the temperature set at 105-110qC.

5. Find the mass of cans after 24 hours.

6. Enter the data in observation table and compute the water content of the given soil.

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7 Things You Should Not Do With Water Content Determination | Procedure | Formula | Apparatus

Water Content Determination | Procedure | Formula | Apparatus

Objective:

Theory:

Apparatus