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Expected paver settlement on sand

27410 Views 5 Replies 4 Participants Last post by  concretemasonry
I am installing concrete pavers on a 6" base of compacted gravel with 1-2inch sand on top. The problem is that i need the top of the pavers to end up flush with an adjacent concrete sidewalk. I am setting the pavers over uncompacted sand about 1/2 inch above the sidewalk and will use a plate compactor to settle them (i hope) down to the sidewalk. So i have two questions:
1. How much will concrete pavers (4x8x2 3/8) settle when you run a plate compactor over them ?, and
2. If they dont settle enough will i be able to pry them out, remove some sand and re-set or will they be locked in too tightly to move (does it matter if i put polymeric joint sand into the joins before i compact them) ?

thanks for any help !
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The sand setting bed should be a UNIFORM 1" thickness and UNCOMPACTED. You cannot compact a sand that meets the specifications. All compaction should be concentrated on the base as you shave it to a smooth surface the allows you to use a uniform sand thickness. If you want a slope for drainage, the base should be sloped so you can maintain a uniform thickness of the setting bed.

The purpose of using a plate vibrating compactor is to draw sand into the joints from above and below to insure a uniform, strong, even surface and to give the surface layer stability and strength so it can spread out the loads to larger area of the base material.

On a patio, you can get away with a few deviations. Polymeric sand is permissible, but it is never used on more critical installations like streets, roads, airport taxiways and ship unloading facilities were you have real loads.

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