Identifying Coarse Grained Soils less than 50 fines

Group symbol

Group name

Gravel o gravel> % sand

Gravel o gravel> % sand

Poorly graded ,

Poorly graded -Well-graded Poorly graded

►Fines=ML or MH-Fines=CL or CH -Fines=ML or MH-Fines=CL or CH _

►Fines=ML or MH-Fines=CL or CH -Fines=ML or MH-Fines=CL or CH _

Note: Percentages are based on estimating amounts of fines, sand, and gravel to the nearest i Source: ASTM D 2488 (fig. 2). Copyright ASTM. Reprinted with permission.

► >15% sand -►<15% sand -►>15% sand -►<15% sand-

"►<15% gravel --►>15% gravel --►<15% gravel -► >15% gravel -

-►<15% gravel -'►>15% gravel --►<15% gravel -►>15% gravel --►<15% gravel -• >15% gravel --►<15% gravel -- >15% gravel -

-►<15% gravel -• >15% gravel --►<15% gravel ->15% gravel -

-►Well-graded gravel -►Well-graded gravel with sand

-►Poorly graded gravel -►Poorly graded gravel with sand

-►Well-graded gravel with silt -►Well-graded gravel with silt and sand -►Well-graded gravel with clay -►Well-graded gravel with clay and sand -►Poorly graded gravel with silt -►Poorly graded gravel with silt and sand -►Poorly graded gravel with clay -►Poorly graded gravel with clay and sand

—►Silty gravel -►Silt gravel with sand -►Clayey gravel -►Clayey gravel with sand

-►Well-graded sand with silt -►Well-graded sand with gravel -►Poorly graded sand -►Poorly graded sand with gravel

-►Well-graded sand with silt -►Well-graded sand with silt and gravel -►Well-graded sand with clay -►Well-graded sand with clay and gravel -►Poorly graded sand with silt -►Poorly graded sand with silt and gravel -►Poorly graded sand with clay -►Poorly graded sand with clay and gravel

-►Silty sand -►Silty sand with gravel -►Clayey sand -►Clayey sand with gravel

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