Optimum Moisture content 11.5% looks fine. How many fine in this sand? around 10-15%? The maximum lab dry density (131),on my own opinion, is too high. Field densities look more reasonable.
I would say that the better compaction could be reached with moisture content 1-2% less than optimum MC...
What is the Lab max density ( MD) and optimum moisture content (OMC) of this sand? What results densities/moisture content (D/M C) do you get in situ test?
If the mosture content of the sand on the site is too high you cannot compact this material.
The only solution in this case:
- excavate...
Actually, if you have less than 20% of cobbles in the soil and matrix between cobbles filled by clay (no contact between cobbles), you can simulate the behaviour of the material as a clay using higher bulk densit
Ron is absolutely right regarding ASTM D2487 (unified classification) and D2488 (Visual classification).
The best way to make a good soil profile of borehole logs is following:
- Dry small representative soil pieces (2-3 cm) from each run
- Arrange them after drying in the order of depth
-...
I am going to carry out this test using triaxial cell and consolidometer. Mean time I don’t have the equipment (I've just ordered it). Do I have to fill out triaxial cell with water and do the saturation as in Triaxial test (cell pressure back pressure) or I have to operate only back pressure...
