INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!

*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.

Jobs

What is known as Geofoam

What is known as Geofoam

(OP)
Hi,
I recently found that one of our neighbors used a white colored material for landfilling named Geofoam. Anyone knows what is this exactly? Does it cause any kind of soil pollution?

RE: What is known as Geofoam

Perfectly safe

RE: What is known as Geofoam

Used frequently in backfill conditions to lower lateral pressures to retaining walls.

No worries.

Mike McCann, PE, SE (WA)


RE: What is known as Geofoam

This may absorb water considerably... you might be looking for closed-cell extruded polystyrene... in Canada, Type 4 for UV exposure.

Dik

RE: What is known as Geofoam

In my experiences this types of materials are ok for low bearing pressures from slabs but when there is point loads involved they are not so good. There are different types that are suitable for different uses so i would always check with the supplier (and get confirmation via email, not a phone call).

RE: What is known as Geofoam

Hopefully it's buried so there is no UV exposure, but an added benefit is eliminating frost effects under it or if it is adjacent to a foundation. Not sure where you are, but we have to worry about it here.

RE: What is known as Geofoam

Back when I worked for the Kansas DOT we replaced a large portion (>10,000 C.Y.) of a brand new bridge embankment with Geofoam. That was in 2005 and as far as I know it's still performing well. It had a crushed rock underdrain which also worked quite well. The plans also specified to wrap the outside surface of the Geofoam with a strip drain (Mirafi I believe). This was basically a black dimpled plastic with a black geotextile glued to the the dimpled side. In the heat of the summer day the black plastic heated up significantly and "softened" (i.e. melted). It also melted the Geofoam underneath it. Fortunately we discovered this pretty quickly and kept the strip drain covered up as soon as it was placed so it couldn't heat up.

RE: What is known as Geofoam

there are no third-party detriments. As a neighbor, I'd not worry.

There are two design concerns with geofoam. One is buoyancy. If the ground water table inundates enough of it, it'll pop out of the ground. That can be addressed by design. The other is attack by hydrocarbons. If diesel fuel, gasoline or other such compound leaks into the ground it'll dissolve. In practice, we cover the geofoam by HDPE or other such membrane.

I'd put my feet up on the coffee table and go back to enjoying life!

f-d

ípapß gordo ainÆt no madre flaca!

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!


Resources


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