Barton, M. E., Cresswell, A and Brown, R
Measuring the effect of mixed grading on the maximum dry density of sands
2001, Geotechnical Testing Journal. ASTM, USA, 24, (1), .
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During cut and fill operations, compaction using sands from different sources may be carried out. The resulting mixed sand will have different compaction characteristics than those of the parent sands. An increase in dry density will result as the grading moves towards more ideal characteristics for dense packing. Laboratory compaction tests using pluviation and the vibrating hammer method have been carried out to measure this increase in dry density. The resulting value is generally significantly greater than the result predicted by taking the mean value of dry density given by the parent sands.
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