Soil Classification question

Okiryu · Apr 24, 2015

Hi,

How do you classify a soil if it has more than 95% passing sieve No. 200 (0.075mm), and 60% passing the 0.005mm sieve. With a LL=108%, PL=65% and PI=43%.

I am asking this, because sieve analysis shows that most of the particles are clay, but it plots below the A-line in the plasticity chart.

Thanks !

moe333 · Apr 25, 2015

ASTM is based on Atterberg Limits, not %clay

killswitchengage · May 3, 2015

To my knowledge , these data shows that this is a highly plastic silt ,try and verify if it is organic if you do have HCL drop some on the soil to get a sens of its organic composition

fattdad · May 4, 2015

astm d-2487

f-d

ípapß gordo ainÆt no madre flaca!

BigH · May 7, 2015

BS 5930, Section 6; EN ISO 14688-1

Okiryu · May 14, 2015

I was checking the local classification (I am located in Japan) and this type of soils classifies as highly plastic volcanic cohesive soils. We call these soils as LOAM. The shear strenght for these type of soils decrease significantly once disturbed (sensitive soils??). Compaction is difficult due to has high water contents (close to 100%) and therefore not recommended for embankments.

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Soil Classification question

Okiryu

Civil/Environmental

moe333

Geotechnical

killswitchengage

Geotechnical

fattdad

Geotechnical

BigH

Geotechnical

Okiryu

Civil/Environmental

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