Question: You are an earthwork construction control inspector checking the field compaction of a layer of soil. The laboratory compaction curve is shown in Fig. P5.20.

You are an earthwork construction control inspector checking the field compaction of a layer of soil. The laboratory compaction curve is shown in Fig. P5.20. Specifications call for the compacted density to be at least 95% of the maximum laboratory value and within 2% of the optimum water content. When you did the sand cone test, the volume of soil excavated was 1165 cm3. It weighed 2230 g wet and 1852 g dry.

(a) What is the compacted dry density?

(b) What is the field water content?

(d) Does the test meet specifications?

(e) What is the degree of saturation of the field sample?

(f) If the sample were saturated at constant density, what would be the water content?

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