
Any tips on compacting?
I have to compact the sand for the footings of my extension. The engineer told me to have the footings dug, then flood them with water and run an upright rammer through them the next day.
The concreter said if he digs the footings first and I put a rammer in them, the sides will collapse and make them irreparable. He says just wet the footing areas with the hose, then a rammer will compact up to a metre below the ground, so I should be right.
I hosed down where all the footings will go and I’ve been pushing this thing around all day, the earth has sunk up to 100mm in places, but I can’t get the penetrometer to sink less than 500mm every 7 blows (up to 300mm maximum will pass).
Anyone have any clue what I should do to get it to compact?