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Can anyone help. We are currently conducting volumetric expansion tests on slag samples on a method which i beleive is based on an American standard (we are in UK). In summary a sample has been compacted into a CBR mould, immersed in a water bath at 80 deg C, swell measured in mm and converted...

Let me know how you get on with it. I have never used it, just remembered seeing it whilst looking for Hazens formula one time. Good to see another UK user on eng-tips. Its a pitty there isn't a UK equivalent.

The Kozeny-Carmen Method is described in Soil Laboratory Testing, Vol 2, K H Head (available from ELE International). It shows a worked example in section 10.5.3. Although the example shown is a sand, it suggests the range for is 20mm-0.3mm for soils with permeabilities ranging between 1.0 x...

I think focht3 comments have answered the query in this instance. For some uses, one point compactions are particularly useful as a quick means of evaluating the workmanship of engineered fills. In particlular on variable materials (eg made grounds/ash etc). When there is confidence that the...

To clarify for jheidt2543, we will always inform our clients where (and why) we have any reservations with any testing requirements, whether it be for plates or any other part of our service. We are a proactive lab and frequently get involved with problem solving, suggesting alternatives for...

OK OK OK. I feel like I have been suitably battered with the weighty hammer of the geotechnical engineer. I think if I go back to my original thread, I answered my own question. That is "..let us do the testing and you guys do the clever stuff". That will also be my answer to all...

Wow. My first time on eng-tips and it seems I have set the cat amongst the pigeons. I'm suitably impressed by the quick responses too. I thought an extract from a recent specification might help (in case I have caused any confusion). Here goes: "The surface plate bearing tests shall...

Focht3 Thanks for the speedy reply. I hear what you say regards how representative the test is for the example given. However the fact remains the designers are specifying plate tests a means of testing a materials acceptability. Somebody somewhere must be evaluating our data and deciding if...

As a test house in the UK we frequently conduct plate loading tests. The method essentially being based on the requirements of BS 1377: Part 9, ensuring that the plate is loaded such that the settlement recorded is in excess of 1.25mm. We then evaluate the data in accordance with Dpt. Transport...

BS 3882 gives methods for determinimg exchangeable cations. Not sure about CEC