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This method of test is intended for determining the relationship between the moisture content of soils and resulting densities (oven-dry weight per cubic foot) when the soil is compacted in the laboratory with the Harvard compaction apparatus, the apparatus being a miniature kneading type as described in this method. Selection of the most appropriate number of layers, number of tamps per layer, and tamping force depends on the type of material and the intended use to which the compacted material will be put. In general, at least five layers and ten tamps per layer are required to produce homogeneous test specimens.
Partner, Shannon and Wilson, Seattle, Wash.