Question
Download Solution PDFThe determination of plasticity index and the percentage by weight of clay mineral finer than 2 μ present in the soil were done for two soil samples A and B. The ratio of plasticity index to the percentage of clay size particle for the samples A and B are given in the table.
| Soil Sample | Ratio of plasticity index to percentage of clay size particle |
| Sample A | Less than 0.75 |
| Sample B | Greater than 1.25 |
The two soil samples A and B are classified as:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
The Activity of the soil (A)
The activity of the soil is given by the ratio of the plasticity index (Ip) and the percentage of clay fraction (C) in the soil.
It indicates water absorption capacity or indicates swelling and shrinkage characteristics.
Activity \(= \frac{{Plasticity\;Index}}{{Per\;cent\;of\;clay\;particles\;finer\;than\;2\;\mu m}}\)
Activity-based classification of clays:
| Activity | Classification |
| < 0.75 | Inactive |
| 0.75 - 1.40 | Normal |
| > 1.40 | Active |
Hence, The most appropriate answer is Sample A is inactive and Sample B is active.
Last updated on May 28, 2025
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