Compaction
Compaction
(OP)
We are backfilling 6 ft at 95% compaction. I have checked with my coworker who said there is no ASTM testing requirement but the common practice is to test the top 8" -12" layer via nuclear gauge. Is he correct or testing frequency is required?





RE: Compaction
I usually go with testing, irrespective of whether there's an ASTM requirement or not.
f-d
¡papá gordo ain't no madre flaca!
RE: Compaction
ASTM will only tell you how to do the tests.
It would depend on project specific data on the material and final use, but you should be testing each 12" lift at a minimum about every 2500 square feet.
It is completely pointless to dump 6 feet of fill and then test the top foot.
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Remember, contractor's see ALL lifts as being 8" thick even when they are 24" thick.
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Richard A. Cornelius, P.E.
WWW.amlinereast.com