Soils classification
Soils classification
(OP)
I would like to know whether we need to run
D1140 (200 wash) when we are already doing
200 wash while we run the hydrometer(D422)
while we do soils classification.
D1140 (200 wash) when we are already doing
200 wash while we run the hydrometer(D422)
while we do soils classification.
Mohammed A Sharief





RE: Soils classification
RE: Soils classification
RE: Soils classification
RE: Soils classification
Whatever u suggested is against ASTM
procedures.The way u suggested is not
correct.D1140 uses hot oven and D422 air dry samples.
Mohammed A Sharief
RE: Soils classification
D422 uses material passed #10 for hydrometer analysis and i am in the idea that hydrometer analysis in material passed #200 after doing D1140 is more repreasentive for the clay fraction(<0.002mm) of soil.
regards
RE: Soils classification
Then run D1140 on the oven-dried "remains" of the D422; the results will be used on the same grain size curve (well, they should be, anyway.) This will give you a "good" point on your curve for comparison to the calculated hydrometer results. Remember that D422 has a lot of potential sources of error...
RE: Soils classification