ive got an area of 4.8metres x 15 metres that is 16cm deep at the outer end and 12cm deep at the inner house end to fill with rubble to make level. this will leave 2cm for sand and 4cm for the paver to come up to the height i want. ive calculated that to be about 10.08 cubic metres right?? ive been told by the garden place that 1 cubic metre is 2 tonne so ive ordered 21 tonne. its been delivered and ive moved it into place and it looks way too much. see picture below. will it go down as it...

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