Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


One Dimensional Consolidation

One Dimensional Consolidation

One Dimensional Consolidation

Hi all! I'm a new engineer and have been working at a geotechnical company for a couple of months. I am trying to read standards, publications, test procedures, and get as much information as possible for my job. We also do soil laboratory testing, and I have a problem with the oedometer test, and wanted to discuss it with someone who has more experience than me.

I have set up a clay sample and want to perform the 1D consolidation test. The sample diameter was 7.5cm and the height 20mm. After setting up the sample in the assembly (with porous stones and filters included), I filled the assembly with water. Now, in order to keep the sample from swelling, the ASTM standard says to apply a stress of around 5 kPa (could be more or less, depending on the soil). In my case, in order to avoid swelling and bring the sample height back to 20mm (it got swollen as soon as i put the water), i needed to apply the stress of 100 kPa.

I was originally planning a loading series of 50 kPa, 100 kPa, 200 kPa, 400 kPa, (and then perform the unloading and reloading accordingly).

My question is, what should the next loading series be? Should I continue with 200 kPa (since the first load needed to be 100 kPa)? Should I continue with my original plan and add (50kPa, 100kPa, 200kPa...) to the initial 100 kPa stress?

I would really appreciate if you could give me some guidance.

I apologize for posting this twice, I just saw the section of soil testing.

Thank you!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - The Evolving Landscape of Commercial Battery-Powered Trucks
What’s driving the evolving landscape of truck electrification? What are the barriers, motivators and strategies for accelerating the electric transition? What insights and resources are available for today’s design engineers working to achieve industry disruption and evolution? For answers to these and other pertinent questions, read this white paper. Download Now
eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close