Classification of Soils for Engineering Purposes - Soil Properties: Testing, Measurement, and Evaluation - page 160

System. Input to this program includes the following laboratory results
that are supplied in response to prompts: (a) percent passing through
standard sieves #200, #40, #4, 1 ⁄ 2 in., 3 ⁄ 4 in., 1 in., 2 in., and 3 in.; (b) Atter-
berg limits (liquid and plastic limits); and (c) diameter at which 10%,
30%, and 60% of the particles are smaller. Output from the program is
the soil classification of the sample in accordance with ASTM D 2487,
based on the laboratory results. The program accepts the input, displays
it for error checking, and then classifies the sample. In addition, it dis-
plays various calculated values used during the classification process. A
value of 999 indicates that the associated parameter was not used.
Figures 11-9, 11-10, and 11-11 demonstrate the use of the program to
classify the soil samples considered in Examples 11-2, 11-3, and 11-4,
respectively.

[1] AASHTO, Standard Specifications for Transportation Materials and Meth-

ods of Sampling and Testing, Part I, Specifications , 15th ed., Washington,
D.C., 1990.

REFERENCES

[2] ASTM, 2007 Annual Book of ASTM Standards , West Conshohocken, PA,

2007. Copyright, American Society for Testing and Materials, 100 Barr Har-
bor Drive, West Conshohocken, PA 19428-2959. Reprinted with permission.

[3] A. Casagrande, “Classification and Identification of Soils,” Trans. ASCE,

113 , 901 (1948).

[4] U.S. Army Corps of Engineers, The Unified Soil Classification System ,

Waterways Exp. Sta. Tech. Mem. 3-357, Vicksburg, Miss., 1953.

[5] Jim Stevens, “Unified Soil Classification System,” Civil Engineering ,

December 1982, pp. 61-2.