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6" Minus for backfill in cold weather

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QC73

QC73

Civil/Environmental
Joined
Nov 12, 2010
Messages
3
Location
CA
We are backfilling a cast in place culvert with 6" minus material. It's mostly rock with some fines. No silt.

Is there an issue with frost? The temprature of material is -10C.
 
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Not as much an issue with frost as with lateral ravelling. Lots of voids that can be filled in there...not a great idea.
 
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stick with sand and gravels, recommend 3" minus or smaller. 6" is too large. If your subgrade is frozen, expect potential settlement in the spring
 
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