### Determine the percentages of gravel-sand-silt and clay

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The particle-size characteristics of a soil are given in this table. Draw the particle-size distribution curve. X-axis is Particle Size and Y-axis is Percent Finer
Particle Size (mm): 0.425, 0.033, 0.018, 0.01, 0.0062, 0.0035, 0.0018, 0.001.
Percent Finer: 100, 90, 80,70, 60, 50, 40, 35
Determine the percentages of gravel, sand, silt, and clay.
a) according to the USDA system
b) according to the AASHTO system

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