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_______ structure develops in clays that have been reworked or remoulded.
1. Honey-comb
2. Clay-matrix
3. Dispersed
4. Single-grained

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Correct Answer - Option 3 : Dispersed

Explanation:

Flocculent and dispersed structures:

  • These are found in the soils having a size of less than 0.0002 mm. The fine particles are mostly flaky, platelets, and not spherical, and contain surface electric charges. The formation of these soils is due to surface electric force and not due to the gravity force.
  • Most of the clay have these structures. In a flocculent structureclay particles connect edge to edge or edges to face.
  • These soils form due to attractive forces.
  • In disperse structure, particles pint face to face and repulsive forces play an important role in the deformation of such soils.
  • Dispersed structures develop in clays that have been remoulded.
  • Flocculent structure enclosed a large volume of voids whereas dispersed structure has relatively fewer voids.

Soil structure:

  • The geometrical arrangement of soil particles with respect to one and another is known as soil structure. The various soil structures depend upon the particle size and the mode of formation.

​Types of structure:

  • Single grained soil:
    • It is found in soils having a size great than 0.2 mm. The major force is gravity force, and surface electric force is negligible.
    • For example-gravels and sands.
  • Honeycomb structures:
    • It is found in soils having sizes of 0.02 mm to 0.002 mm. Gravity force and surface electric force both play a role in the formation.
    • These soils enclosed a large volume of voids. The adhesive forces hold the particles together.
    • When the structure unbroken such soils may have the ability to bear the high load, but once the structure destroys, the load-bearing capacity reduces suddenly.
    • For example- silt.
  • Flocculent and dispersed structures:
    • Discuss the above
  • Coarse-Grained skeleton:
    • It found in composite soils having a mixture of coarse and fine particles. The coarse-grained particles are in contact with each other and the voids are filled by fine-grained particles. When soils have low compressibility and high load-carrying capacity.

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