RELATIVE COMPACTION ON FDT
RELATIVE COMPACTION ON FDT
(OP)
We are testing for compaction lahar (volcanic ash) using field density test.
MDD = 1.67 gm/cc
OMC = 13.77%
We had results giving 148% compaction!
Resulting to a in-situ dry density of 2.46gm/cc
(AS HARD AS CONCRETE!)
Obviously, something is wrong already.
CAN YOU PLEASE ADVISE A MAXIMUM CRITERIA OF ACCEPTANCE FOR RELATIVE COMPACTION?
Does 115% sound reasonable?
Thanks!
MDD = 1.67 gm/cc
OMC = 13.77%
We had results giving 148% compaction!
Resulting to a in-situ dry density of 2.46gm/cc
(AS HARD AS CONCRETE!)
Obviously, something is wrong already.
CAN YOU PLEASE ADVISE A MAXIMUM CRITERIA OF ACCEPTANCE FOR RELATIVE COMPACTION?
Does 115% sound reasonable?
Thanks!





RE: RELATIVE COMPACTION ON FDT
Run a moisture-density relationship on a couple of specimens and see if they plot on the original curve. If not, you have a material change and need to do a new Moisture-Density relationship curve.
RE: RELATIVE COMPACTION ON FDT
MDD: 2.27 gm/cc
OMC: 8.30%
Specific Gravity = 2.98
CAN YOU RECOMMEND A CUT OFF TOO?
NOTE: STANDARD PROCTOR TEST was used to get the MDD and OMC.
RE: RELATIVE COMPACTION ON FDT
If you are using vibratory compaction equipment and your material has less than 10 or 15 percent fines, I would use the Modified Proctor.
RE: RELATIVE COMPACTION ON FDT