The Revised ASTM Standard on the Unified Classification System

    Volume 7, Issue 4 (December 1984)

    ISSN: 0149-6115


    Page Count: 7

    Howard, AK
    Supervisory civil engineerMember of ASTM, U.S. Bureau of Reclamation, Denver, CO


    ASTM Test Method for Classification of Soils for Engineering Purposes (D 2487) was significantly revised in 1983. The revisions require that soil is to be classified by using both a symbol and a name, and the group names were standardized. Organic silts and clays were redefined to recognize that organic soils occur that plot above the “A” line on the plasticity chart. More precise guidelines were established, particularly with regard to plasticity, so that only one particular classification will result. If boarderline classifications are used, the classification symbols are separated with a slash with the classification symbol indicated using the standard appearing first. Appendixes give example written descriptions, preparation of soil for testing, and guidelines for using the system for materials such as shale, mudstone, crushed rock, and slag

    Paper ID: GTJ10505J

    DOI: 10.1520/GTJ10505J

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    Title The Revised ASTM Standard on the Unified Classification System
    Symposium , 0000-00-00
    Committee D18