×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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.

Students Click Here

CONCRETE SLAB EFFLORESCENCE

CONCRETE SLAB EFFLORESCENCE

CONCRETE SLAB EFFLORESCENCE

(OP)
Hi,

I have two occurences where some efflorescence was found on a basement slab on grade. Each time, the efflorescence was located along the residual glue joints of an old vinyle flooring installed directly against the slab. The thing is that it seems to migrate thru the slab rapidly and it desintegrates the slab itself. Efflorescence should not be a rapid phenomenon, so I am doubtful. I also have a photo of it.

RE: CONCRETE SLAB EFFLORESCENCE

What is your question?

RE: CONCRETE SLAB EFFLORESCENCE

(OP)
The thing is that I've always seen efflorescence as a long process and in these sites, it comes fast. Could it be that it is something else? And is it the result of an important humidity problem?

RE: CONCRETE SLAB EFFLORESCENCE

My first house had a cmu basement wall that was not filled or reinforced. I also suspect that it had little or insufficient waterproofing or drainage measures on the outside since it too had efflorescence.

I would go down there with a flat blade and scrape off the efflorescence about every 2 to 3 weeks. So I know that at least in below grade cmu (especially during the rainy season), it can reoccur on a pretty regular basis. It is usually harmless and seen more as an eyesore than anything else. It looks like the top surface of the slab is eroded, but my guess is that when the tiles popped up or were removed, it probably took the skin surface of the concrete with it.

Its not a humidity problem, humidity is generally associated with water in the air. Your problem is due to moisture in the soil.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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