Sand-cone equipment is used to determine an inplace unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 100 pcf. (a) From the information given below, determine the in-place dry unit weight of the tested soil, and the water content. Soil sample dug from test hole, wet weight 4.62 lb Dried weight of soil sample 4.02 lb Weight of Ottowa sand (sand cone) to fill test hole 3.60 lb (b) Determine the percentage of compaction of the tested soil if the laboratory moisture–unit weight curve indicates a dry unit weight of 115 pcf and an optimum moisture content of 13 percent

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