500 g of dry soil was used for a sieve analysis. The masses of soil retained on each sieve are given below:
US standard sieve | Mass in g | US standard sieve | Mass in g |
2.00 mm | 10 | 500 μ | 135 |
1 .40 mm | 18 | 250 μ | 145 |
1.00mm | 60 | 125 μ | 56 |
75 μ | 45 |
Plot a grain size distribution curve and compute the following:
(a) Percentages of gravel, coarse sand, medium sand, fine sand and silt, as per the Unified Soil Classification System, (b) uniformity coefficient (c) coefficient of curvature.
Comment on the type of soil.