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Old 2018-04-04, 10:17 AM
BartBandy BartBandy is offline
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Join Date: May 2010
Location: Ontario/Nobleton
Posts: 1,662

Plate tampers only work for small lifts (layers) of backfill, and are commonly used for final sand layer for interlock and then bedding the newly placed interlock in the sand evenly. The will do nothing for a gravel driveway.

If you want to try to compact the material you have, you'll need a roller. The kind that arrive on a flat bed. I just don't think it's even worth compacting a bad subbase.
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