On which of the following factors the crushing strength of stone does not depend?
💪 Understanding Crushing Strength
Crushing strength (or compressive strength) is an intrinsic property of a stone that measures its ability to resist a crushing force. It is determined by the stone's physical makeup and chemical composition. Let's look at the factors that influence this critical property.
🔬 Detailed Analysis of the Factors
B. Workability
This is the correct answer. Crushing strength does not depend on workability. In fact, the relationship is the other way around: workability depends on strength.
Workability is defined as the ease with which a stone can be cut, dressed, and shaped. A stone that is easy to work is typically softer and has a lower crushing strength. A stone with very high crushing strength (like granite) is very difficult to work. Therefore, workability is a consequence of the stone's hardness and strength, not a factor that determines it.
A. Texture
The crushing strength of a stone is highly dependent on its texture. Texture refers to the size, shape, and arrangement of the mineral grains.
- A stone with a fine-grained, dense, interlocking crystalline texture (like granite) will have a very high crushing strength.
- A stone with a coarse-grained, porous, or poorly cemented texture will have a much lower crushing strength.
C. Specific Gravity
Specific gravity is a measure of a stone's density. The crushing strength is directly related to specific gravity. A higher specific gravity generally indicates a denser stone with fewer voids or pores. This dense structure provides greater resistance to crushing forces, resulting in higher strength.
D. Both the texture and specific gravity
Since strength depends on both texture and specific gravity, this option describes factors that *do* affect crushing strength, making it an incorrect answer to the question "does not depend."
📊 Summary: Factors and Their Relationship to Crushing Strength
| Factor | Relationship to Crushing Strength | Explanation |
|---|---|---|
| Workability | Does NOT determine strength | Workability is the result of strength; high strength means low workability. |
| Texture | Directly affects strength | Dense, crystalline textures increase strength. |
| Specific Gravity | Directly affects strength | Higher density (fewer voids) increases strength. |
💡 Study Tips
- Cause vs. Effect: The key is to distinguish cause from effect. Texture and density are the *cause* of a stone's strength. Workability is an *effect* of that strength.
- Easy to Work = Weak: Think about it logically. If a stone is easy to cut and shape, it must be relatively soft. Soft materials are not strong.
- Dense and Heavy = Strong: A stone that feels heavy for its size (high specific gravity) and looks tightly packed (dense texture) will be strong.