Question
Asked Jan 16, 2020
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Report the percentages of gravel, sand, silt and clay according to the AASHTO soil classification system. 

soil gradation chart
120
100
80
60
40
20
0.1
100
0.01
10
particle size (mm) - log scale
percent finer (%)
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soil gradation chart 120 100 80 60 40 20 0.1 100 0.01 10 particle size (mm) - log scale percent finer (%)

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Expert Answer

Step 1

Determine the values of D10, D30, D60:

Civil Engineering homework question answer, step 1, image 1
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Step 2

Just doing simple interpolation, get the values:

Civil Engineering homework question answer, step 2, image 1
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Step 3

Calculate the value of coefficient of unifo...

Civil Engineering homework question answer, step 3, image 1
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