Geotechnical Engineering Geotechnical Engineering (USCS) Soil Mechanics I Chapte

Question

Geotechnical Engineering Geotechnical Engineering (USCS) Soil Mechanics I Chapter One Basic Characteristics of Soils instructor: Dr. Hany El Naggar Example 3: The results of particle size analyses of four soils A, B, C and D are presented in the gradation curves shown in the Figure below. The results of the limit tests on each of the four soils are summarized in the table below. Classify these soils according to the USCS system. C D % 60 NA 46 37 PL% 26 NA 34 18 SAND GRAVEL FINES 100% 80% 60% 20% 10.000 100.000 0.100 Particle size (mm) o00I 0.010 18

Explanation / Answer

Soil A is CH i.e. clay of high plasticity

Soil B is SP i.e. poorly graded sand

Soil C is SW i.e. well graded sand

Soil D is GP i.e. poorly graded gravel

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