![]() ![]() Such soils are definitely poorly graded and are called uniformly graded. In that case the whole soil mass consists of only one grain size and graph of such case will be something like this. This parameter is called coefficient of uniformity and it is defined as D60 divided by D10. Such soils completely miss the amount of soil between two certain particle sizes. Hence this curve is said to be representing a poorly graded soil. This shows that this particular soil graph represents a soil which contains almost all the particles of different sizes. It will be very difficult to plot this range on the normal scale. Whenever we observe the gradation curve we should be careful about the horizontal scale opted. This curve is obtained from the percentage finer results of both coarse and fine grained portions of the soil that is it results from both sieve and hydrometer analysis. ![]()
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