back fill trench for electrical in slab

Old 06-03-20, 03:42 PM
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back fill trench for electrical in slab

I have a trench cut the is 6 ft by 4 inches long that I put PVC conduit for electrical to my island. I need to backfill with concrete. Can I use something like Quikrete NON-SHRINK PRECISION GROUT to backfill that or is there another Quikrete product that is better? Thanks
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Old 06-03-20, 04:04 PM
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Just fill deep areas with gravel, install vapor barrier (5 mil plastic will do), then just pour regular concrete mix.
Grout is not intended for something that thick.

Also, I see copper tubing under the slab. Wrap that with something like insulation. Do not let concrete contact copper tubing.
Old 06-03-20, 04:32 PM
Tolyn Ironhand's Avatar
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Grout would also be quite a bit more expensive than concrete mix,

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