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Soil-Indentification-and-Classification

Explain basic differences between AASHTO and USCS soil classification systems.


  1. According to the AASHTO  system, a soil is termed fine-grained if  if more than 35% passes through number 200 sieve i.e 0.075mm whereas in the USCS system,a soil is termed fine-grained if more than 50%  passes through number 200 sieve. Thus in that sense, the AASHTO system is somewhat better because the soil behaves as fine grained when the percentage of fine is 35% in the limit of 50% in USCS is somewhat higher.
  2. In AASHTO system, sieve NO.10(2 mm size) is used to divide the soil into gravel and sand where is in USCS sieve NO. 4(4.75 mm)  is used.
  3. In USCS system, the gravelly and Sandy soils are clearly separated where is in AASHTO system, clear demarcation is not done.
  4. Symbols used in USCS system are more descriptive and are more easily remember than those in AASHTO system.
  5. Organic soils are classified as OL and OH as peat (`P_t`) if highly organic,in USCS system. In AASHTO system, there is no place for Organic soils.
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Introduction

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Index properties of soil

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Phase Diagram Of Soil

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Soil Indentification and Classification

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Soil Structure and Clay Minerals

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Soil Compaction

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Principle of Effective Stress, Capillarity, and Permeability

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Seepage through Soils

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Vertical Stress below Applied Load

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Compressibility of Soils

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Shear Strength of Soil

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Stability of Slopes

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Similar Question

This Chapter Soil-Indentification-and-Classification consists of the following topics

Explain the Indian Standard Soil classification system.

Explain basic differences between AASHTO and USCS soil classification systems.

Explain the basic differences between AASHTO and USCS soil classification systems.

Soil Indentification and Classification

Soil-Mechanics-