Question
Download Solution PDFWhich of the following methods make use of infra-red lamp In the determination of water content of soils ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- Torsional Balance Method:
- This method involves the use of a torsional balance, which is a type of moisture meter.
- The soil sample is placed in the instrument, and an infra-red lamp is used to dry the soil by emitting heat.
- As the water evaporates, the balance measures the loss in weight, which is directly related to the water content of the soil.
Additional Information
Methods used for finding water content:
| Method | Properties |
| Oven drying method | Most accurate method and is a standard laboratory method |
| Pycnometer method | More suitable for cohesionless soil as removal of entrapped air from cohesive soil difficult. |
| Sand bath method | It is a rapid method, hence not very accurate |
| Calcium carbide method | Takes just 5-7 minutes and used as a field test |
| Alcohol test | It is a quick field test and not used for soils containing calcium or organic compound |
| Radiation method | Gives water content in an in-situ condition |
Last updated on May 28, 2025
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