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Why must the large cobbles or boulders be removed from backfill?

April 26, 2017backfill cobbles large removed

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Why must the large cobbles or boulders be removed from backfill?

1 Answer

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10 Posted

Large cobbles or boulders, larger than 0.75 times the loose thickness of the compacted lift should be removed. The presence of too many large rock makes it almost impossible to compact the soil between adjacent rock.