For a soil specimen, given the following: % passing sieve #4 - 92%, sieve # 10 - 81%, sieve #40=78%, LL-48%, PL-16%, GI=18.2 classify the soil by AASHTO classification system.

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Soil classification and characteristics

Soil classification is a method of categorizing soil based on its properties, types, and uses. The motive of soil classification is to arrange various types of soils and divide them into groups for various engineering and agricultural purposes. Soil classification is carried out by various agencies as per their purposes. From an engineering perspective, soil classification is done to find out the suitability of soil for various construction purposes like the construction of dams, foundations, highways, infrastructures, and so on. For engineering purposes, the soil is classified by the following systems: