Well Graded

Well Graded Soil

Well Graded: In the soil classification process of geology, well graded soil represents a sedimentary soil sample that fully displays all of the possible grain sizes for that soil classification, in accordance with the Unified Soil Classification System (USCS). For example, a well graded sand (SW) comprises fine, medium, and coarse grains of sand. Whereas poorly graded sand (SP) only consists of one or two of the three possible grain sizes. Similarly, in the geotechnical and engineering geology branches of geology, the term well graded is also synonymous with the term “poorly sorted.”

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