Think well graded sand should have a pretty flat curve and not sensitive to normal mc changes. NMC 5 to 8%?
Not sure you could place and roll at 14%.
Cheap to do a sand replacement density test in this material.
OP - text books do not allow to scale from plate test to foundation settlement because it is not good engineering unless multiple favourable ground conditions are satisfied at the specific site
Any / all soil mechanics with foundation engineering text books.
Soil mechanics in engineering practice by Karl Terzaghi.
Fundamentals of Ground Engineering by John Atkinson.
A short course in Foundation Engineering by Simons & Menzies.
Some absence of precision indicates an understanding of the variability of ground, how well it is tested. Inappropriate accuracy sometimes due to engineers using calculations in ground structures more used to concrete and steel.
In UK, "marl/marly" might be used for all grey/non-white chalk or even calcareous glacial clay by non-geologists. The term may be accurate according to what the geology actually is (on the map and in specimen), or written as a loose description of what a person saw having some knowledge.
My gut feeling is the limits don't correlate well with particle distribution, PI is similar for all samples tested. I would expect sample from 8m to be less plastic. Need more information to check something else is going on like the log and the geology type. Is there only one error? Then how...
Just a thought, but could the lab results be on partly crushed particles due to lab effort of a hammer in a mould and in the field then differently crushed by the plant leading to messed up correlations.
A plate test would give a stress/strain response and a maximum deflection could be...
"Carbonate soils differ in many ways from the siliceous sands. An important distinction is that the major constituent of carbonate soils is calcium carbonate which has a low hardness value compared to quartz, the predominant constituent of the silica rich sediments. Susceptibility of carbonate...
I think classifications exist for civil engineers to apply understanding/process to soil layers on large projects for generalisations. They help with interpretation of big data, but don't lose sight of any facts.
I don't tend to use classifications and look at the hand specimen engineering...
The purpose of the classification is for understanding material engineering properties, and the possible variations.
I'm UK based engineering geologist, we have lots of mixed soils.
Logging and classification are linked, but not the same thing. Engineering behaviour of a soil is often...
The plate diameter is 600 mm, so reasonably close to a model small foundation.
The stress/strain curve shows small settlements <1mm at low stress, then very small settlements at >0.1MN/m2.
Is it possible that the steep curve is bedding in the test apparatus, then the second part of the curve...
I have a dewatering insurance case at the moment where drawdown 10 m of water has been modelled to give a change in total stress below a footing and elastic theory indicates 10-20 mm of settlement which might be why the buildings have cracked a bit and then there has been a small amount of...
Seems multiple issues.
The nearest example I have is agricultural reservoirs in chalk up to 100 million gallons. The first lift only is deeper by necessity and is acceptable because it is compacted part by surcharge from later lifts. The embankment overall would get stronger as it rises (not...
Shear strength vs compaction in clay. This is interesting to me at the moment.
Cant beat a big field test and I haven't seen the book. I suspect using HV or PP you are measuring original to remoulded shear properties.They are small size shears and would be higher as water content is lower...
settlement theory/principles
total = elastic/initial + consolidation + creep
defining the material characteristics are necessary to work out which is important
for a saturated stiff clay (with no other information) it is consolidation
consolidation s = coefficient of compressibility x...
