uscs soil classification flow chart

endstream endobj 631 0 obj <>/Metadata 35 0 R/Outlines 59 0 R/Pages 628 0 R/StructTreeRoot 71 0 R/Type/Catalog>> endobj 632 0 obj <>/Font<>/Pattern<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 633 0 obj <>stream Knowledge of soil classification, including typical engineering properties of various soil groups, is especially valuable when prospecting for earth materials or investigating foundations for structures. %PDF-1.5 0

endobj %%EOF Figure 5.1: USCS flowchart For coarse-grained soils, the erodibility is influenced mostly by gravity forces and therefore by the grain size. 41. Determining the Unified Soil Classification System (USCS) Symbol and Group Name with Modifier using lab data (ASTM D2487)

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55, January 2012) Table 3–9 USCS components and modifiers 3–15 Table 3–10 Soil components and significant properties 3–16 Table 3–11 Gradation descriptors for coarse-grained soils 3–18 Table 3–12 Manual field test procedures for the engineering 3–25 <>>> Part 631 National Engineering Handbook Engineering Classification of Earth Materials Chapter 3 3–iv (210–VI–NEH, Amend. h�bbd```b``�"&�H��`W��L��|`v2�d� ���`�L��U�\Q ��>X����$Y�����JL�L�`{I �30t� 0 ,C �ų���5Q�. 4. %���� )M���OԨ. The system uses soil’s gradation information and plasticity characteristics (LL, PL, PI) for the classification. bUXZi�� ���_h��`і/�CM��Ҕ��S$����/�F6��*"i�6�y�;�NK���آ16sY�rf�e�ҍT�h����t��m�?��q X��RtƣM�d�! <> `�p8v� endobj $588�\� 朗`�A:��>pt�)ܝ�bq Ӧ�]�&WLoP��h̲�a�� �����A��h

If a soil is a sand, the same steps and criteria are used as for gravels in order to determine whether the soil is a well-graded clean sand (SW), poorly-graded clean sand (SP), sand with silty fines (SM) or sand with clayey fines (SC). 1 0 obj �Z��5m�4A�������"`�"���s�Ͼ�֊�80j����^�W ��^�5an�1���S��AL3 �Ǥ�9 ������[�-���/�qR��yQ-p8���lk Cw��dPW�1\�`$?�� �H��y3��鄜�zݼqsВ�tBF��n]M����\�1S�I/�;u�b��HJ��u *Ƞ� �v��cx ��;�WE�xЫW���j`����tӐ1�`9�W�\|]�/?ŀ�fGݺ�G@���ϖ�^��2��6)RJ�|^�N�(P�y�����d�x�"6�a]��zM�7[S��)nź�e�ޞ��*Q as�� �d�7>d4^߻�ڸ�^���0T��2���~�L�DR��R��F�`ZǦ� ���Š���|�۸'+#h� �\EKQ�}�4%u�)�� conditions. Unified Soil Classification System (USCS). Refer to tables … h�b``b``������A��b�,"Q In 1952, the Bureau of Reclamation (Reclamation) and the U.S. endobj

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Chart ML-CL Above line on Plasticity Chart and PI> 7 CL LL ≥ 50 Below line on Plasticity Chart Color or odor Organic OH Inorganic MH Above line on Plasticity Chart CH Highly Organic Soils (Pt) Color, odor, very high moisture content, particles of plant life, fibrous. Soil classification procedure is summarized in Figure 5.1 and 5.2. %PDF-1.5 Figure 3-2 is a flow chart for assigning typical names and group symbols for inorganic fine-grained soils; figure 3-3 is a flow chart for organic fine-grained soils; figure 3-4 is a flow chart for coarse-grained soils. endobj Tests to Characterize Coarse-Grained Soils Visual Examination Determine whether G or S is predominant 630 0 obj <> endobj <>

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