Geotechnical Engineering - Vol 1 | 17. Effect of Addition of Admixtures by Abraham | Learn Smarter
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17. Effect of Addition of Admixtures

17. Effect of Addition of Admixtures

The addition of admixtures to soil primarily serves the purpose of stabilizing it and improves various physical properties, including density, shear strength, permeability, and bearing capacity. Compaction affects soil by decreasing voids and thus increasing density, which in turn influences settlement and compressibility. Different types of soils exhibit varying responses to compaction, impacting overall soil structure, pore pressures, and stress-strain characteristics.

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  1. 1
    Effect Of Addition Of Admixtures

    The section discusses the role of admixtures in stabilizing soil properties...

  2. 1.1
    Stabilizing Agents Are The Admixtures Added To Soil.

    Stabilizing agents are essential admixtures that enhance soil properties,...

  3. 1.2
    Effect Of Adding These Admixtures To Stabilize The Soil.

    Adding stabilizing agents or admixtures to soil enhances its stability and...

  4. 1.3
    Accelerate The Process Of Densification.

    This section discusses how the addition of stabilizing agents as admixtures...

  5. 2
    Effect Of Compaction On Soil Properties

    Compaction significantly alters various physical properties of soil,...

  6. 2.1

    This section discusses the impact of soil compaction and admixtures on soil...

  7. 2.2
    Shear Strength

    Shear strength of soil relates to its ability to resist shear stress,...

  8. 2.3
    Permeability

    This section describes how soil permeability is affected by factors such as...

  9. 2.4
    Bearing Capacity

    This section discusses the bearing capacity of soil, highlighting how...

  10. 2.5

    Settlement in soils is influenced by compaction, which affects properties...

  11. 2.6
    Soil Structure

    This section explores the effects of admixtures and compaction on soil...

  12. 2.7
    Pore Pressure

    Pore pressure in soils is influenced by the moisture content and compaction...

  13. 2.8
    Stress Strain Characteristics

    This section explores the impact of compaction on soil's stress-strain...

  14. 2.9
    Swelling & Shrinkage

    This section explores how soil compaction affects various properties,...

  15. 3
    Influence On Density

    This section discusses the influence of soil compaction on its density and...

  16. 3.1
    Effect Of Compaction Is To Reduce The Voids By Expelling Out Air.

    Compaction reduces soil voids by expelling air, significantly increasing the...

  17. 3.2
    Results In Increasing The Dry Density Of Soil Mass.

    The chapter discusses how the addition of stabilizing agents and the...

  18. 4
    Influence On Shear Strength

    Shear strength in soils is influenced by factors such as dry density,...

  19. 4.1
    Increase The Number Of Contacts Resulting In Increased Shear Strength.

    Increasing the number of contacts between soil particles enhances shear...

  20. 4.2
    Shear Strength Depends On Several Factors.

    Shear strength of soil is influenced by various factors including density,...

  21. 4.3
    Cohesive Soils Compacted Dry Of Optimum Vs. Wet.

    This section discusses the effects of compaction on cohesive soils,...

  22. 5
    Effect Of Compaction On Permeability

    The section discusses how compaction affects the permeability of soil,...

  23. 5.1
    Increased Dry Density Reduces The Void Space.

    Increased dry density in soil leads to reduced void space, enhancing soil...

  24. 5.2
    Soil Compacted Dry Of Optimum Is More Permeable.

    Soil compacted dry of optimum exhibits higher permeability compared to soil...

  25. 5.3
    Soil With Bigger Particle Size Is More Permeable.

    Larger soil particles enhance permeability, affecting various soil...

  26. 5.4
    Increased Compactive Effort Reduces Permeability.

    Increased compaction of soil leads to reduced permeability by decreasing...

  27. 6
    Effect On Bearing Capacity

    This section explores the impact of soil compaction on bearing capacity and...

  28. 6.1
    Increase In Compaction Increases Density And Number Of Contacts.

    Compaction of soil increases density and the number of contacts between soil...

  29. 6.2
    Results In Increased Bearing Capacity.
  30. 7
    Effect On Settlement

    This section addresses how the addition of admixtures and compaction impacts...

  31. 7.1
    Compaction Increases Density And Decreases Void Ratio.

    Compaction enhances soil density while reducing void ratios, significantly...

  32. 7.2
    Results In Reduced Settlement.

    The addition of stabilizing admixtures to soil significantly reduces...

  33. 7.3
    Both Elastic And Consolidation Settlements Are Reduced.

    The section discusses how compaction of soil through admixtures reduces both...

  34. 7.4
    Dry Of Optimum Experiences Greater Compression.

    This section focuses on the effects of adding admixtures to soil and the...

  35. 8
    Effect On Compressibility

    This section discusses the effects of soil admixtures and compaction on...

  36. 8.1
    Optimum Shows More Compressibility.

    This section discusses how optimum moisture content affects soil...

  37. 8.2
    Behavior At Higher Pressure Is Similar.

    This section discusses the effects of compaction and admixtures on soil...

  38. 9
    Effect On Soil Structure

    The addition of admixtures significantly influences soil structure by...

  39. 9.1
    Coarse Grained Soil Behavior.

    This section outlines the impacts of soil compaction and the addition of...

  40. 9.2
    Composite Soil Behavior.

    This section explores how the addition of admixtures affects the behavior of...

  41. 10
    Effect On Pore Pressure

    The section examines the impact of compaction on pore pressure within clayey...

  42. 11
    Effect On Stress Strain Characteristics

    The section explores how various factors, including compaction and moisture...

What we have learnt

  • Admixtures enhance soil stabilization and accelerate densification.
  • Compaction reduces voids, thus increasing dry density and affecting other properties like shear strength and permeability.
  • Different compaction methods yield distinct characteristics in cohesive and granular soils.

Key Concepts

-- Admixtures
Substances added to soil that enhance its stability and physical properties.
-- Compaction
The process of reducing voids in soil to increase its density and overall bearing capacity.
-- Shear Strength
The maximum resistance of a soil to shear stress, influenced by compaction and water content.
-- Permeability
The ability of soil to transmit water, which can be affected by density and compaction efforts.

Additional Learning Materials

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