Question:

Atterberg limits of a soil represent which of the following property at critical stages of soil behaviour?

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Atterberg limits are always determined and expressed as percentage moisture content (% water content by weight).
This makes "Soil moisture" the direct properties measured.
  • Soil moisture
  • Soil texture
  • Soil structure
  • Soil cohesion
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Concept:
Atterberg limits define the critical water content levels at which fine-grained soils transition between different states of mechanical behavior.

Step 3: Detailed Explanation:
The physical state of a cohesive soil depends heavily on its water content (moisture content).
As moisture increases, the soil state transitions through several stages:
\[ \text{Solid} \xrightarrow{\text{Shrinkage Limit}} \text{Semi-Solid} \xrightarrow{\text{Plastic Limit}} \text{Plastic} \xrightarrow{\text{Liquid Limit}} \text{Liquid} \] These boundaries (Liquid Limit, Plastic Limit, and Shrinkage Limit) are specific measures of soil moisture content.
Hence, the Atterberg limits represent the critical moisture stages of fine-grained soil behavior.

Step 4: Final Answer:
The correct option is 1, which corresponds to Soil moisture.
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