Bank Weight of Soil Same as Max. Dry Density
Bank Weight of Soil Same as Max. Dry Density
(OP)
If soils report states that Maximum Dry Density of Sandy Silt is 121.5 lbs/cu ft, would this also represent the Bank, or Natural State Weight? The soils report has no shrink/swell percentages, and I am trying to arrive at some reasonable adjustment factors. Any help would be appreciated.





RE: Bank Weight of Soil Same as Max. Dry Density
If I understand your query right; it is difficult to make an approximation of the natural density from the maximum dry density test results. (if someone has seen one please let me have a copy, would be interesting).
To evaluate the natural density, you definitely need to obtain some cores or do sand replacement tests at site. These are very cheap tests and can be conducted easily.
Having said this, 121.5 pounds per cubic feet is approx 19.5 kN/m3; this is not much for a maximum dry density; which can be up to 21 or so for a well graded material. For all approximations, you could assume a natural density of 17 kN/m3. I presume it is an embankment and generally could be clayey silts. Any case, you must state you density assumption clearly (you have to save your back).
Cheers
RE: Bank Weight of Soil Same as Max. Dry Density
Get the terms clarified as I have seen lawsuits over such. The 121 value may or may not be high, depending on the nature of the material. Densities can vary all over the board....90 pcf to 130pcf or more.
RE: Bank Weight of Soil Same as Max. Dry Density
RE: Bank Weight of Soil Same as Max. Dry Density
RE: Bank Weight of Soil Same as Max. Dry Density