07.
General This test determines 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 this apparatus. 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.
making one complete coverage. This cycle is then repeated until the desired number of tamps has been applied. The tamps should be applied at the approximate rate of 10 tamps per 15 sec. 3. Add the next layer and repeat the procedure until the required number of compacted layers has been placed. The top layer should extend at least ½ in. into the extension collar. 4. Remove mold from clamp. Insert spacer disc in collar remover and ejector.
Moisture-Density Relationship The calculations in Section-6 shall be made to determine the moisture content and corresponding oven-dry weight (density) for each of the compacted soil samples. The oven-dry weights per cubic foot (densities) of the soil shall be plotted as ordinates and corresponding moisture contents as abscissas.
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