Page 55 - RoadCem Manual - PCT BV
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The following properties have been found most useful for this purpose and form the basis of soil identification:
• Percentages of gravel, sand, and fines (fraction passing the No. 200 sieve).
• Shape of the grain-size-distribution curve.
• Plasticity and compressibility characteristics. In the USCS, the soil is given a descriptive name and a letter symbol indicating its principal characteristics.
These properties can be determined by simple tests and, with experience, can be estimated with some accuracy.
USCS Procedure is summarized in Figure 4.2.
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