$5\mathrm{.}21$ You are checking a field$-$compacted layer of soil. The laboratory control curve has the following values:

Problems

$213$

The specification for compaction states that the field$-$compacted soil must be at least $95\%$ of the maximum

control density and within of the optimum moisture for the control curve. You dig a hole of in the compacted

layer and extract a sample that weighs $3\mathrm{.}8$ lb wet and $3\mathrm{.}1$ lb dry.

$($a$)$ What is the compacted ${}_d?$ The compaction $w?$ The percent compaction? Does the sample meet the

specifications?

$($b$)$ If the density of solids is $2\mathrm{.}68M\frac{g}{m^3},$ what is the compacted degree of saturation? If the sample were

saturated at constant density, what would be the water content? $($After C$.$ W$.$ Lovell.$)$