Figure 13-3.—Determination of optimum moisture content.You determine this by applying the test results to plot athe curve indicates that the maximum attainable densitycurve like the one shown in figure 13-3.for the given compactive effort was 127.2 pcf for whichIn this curve, the horizontal coordinates are thethe OMC was 10.9 percent.average moisture contents; the vertical coordinates areThe dotted line marked “98% maximum density”the dry densities. For the test results used in the example,indicates that, in this case, the project specifications13-4
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