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Soil porosity based on Standard Proctor compaction

Soil porosity based on Standard Proctor compaction

(OP)
Hi everyone!

I'm willing to know the porosity of two soil samples based the following data (pretty much all I have):

Soil is 43% clay, 21% silt, 30% sand and 5% gravel.
Bulk density is 3.28 g/cm³.
Dry density is 1.73 g/cm³ with 23.6% moisture content at 100% compaction.
Dry density is 1.65 g/cm³ with 21.8¢ moisture content at 95% compaction.

How can I do it? Is there anything missing to calculate the porosity?

RE: Soil porosity based on Standard Proctor compaction

all that's outstanding is the specific gravity of the soil grains.

f-d

ípapß gordo ainÆt no madre flaca!

RE: Soil porosity based on Standard Proctor compaction

(OP)
What do you mean by outstanding, fattdad? This is soil from an iron mining area.

RE: Soil porosity based on Standard Proctor compaction

Consider around 1 x 10-7 to 10-8 cm/sec. for each.

RE: Soil porosity based on Standard Proctor compaction

(OP)
Thanks oldestguy, but isn't porosity expressed as an adimensional number between 0 and 1 (0% and 100%)?

RE: Soil porosity based on Standard Proctor compaction

I'm talking permeability, or hydraulic conductivity. That is what you need for design. What would you do with porosity anyhow?

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