STP479

    Interim Recommended Practice for the Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes AASHO Designation: M 145-66 I

    Published: Jan 1970


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    Abstract

    This recommended practice describes a procedure for classifying soils into seven groups based on laboratory determination of particle-size distribution, liquid limit and plasticity index. Evaluation of soils within each group is made by means of a “group index,” which is a value calculated from an empirical formula. The group classification, including group index, should be useful in determining the relative quality of the soil material for use in earthwork structures, particularly embankments, subgrades, subbases and bases.


    Paper ID: STP38523S

    Committee/Subcommittee: D18.07

    DOI: 10.1520/STP38523S


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