Oedometer Testing - Soil Analysis

[christian Bendis]

Hello all

I was wondering if any had a background or understanding on soil settlement/consolidation testing specifically oedometer testing.

My understanding is that we simply measure displacement vs time however I have been given the following data:-

Data.png

I dont understand the Dial Reading values which are shown in mm.

I would interpret this data as at 0 min the displacement was 7.82mm, at say 4 min the displacement is 6.78mm - but why are the values for Dial Readings getting smaller I would have thought that as the soil compressed then the displacement values would get larger.

Can anyone help shed any light?

Thank you.

[Kelly_Bramble]

Without pressure applied details, local specifications, end goal of performing soil testing - not sure what you need..

However, here is a document that maybe helpful.

Consolidation_test_calculations.pdf