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


concrete topping cracks

concrete topping cracks

concrete topping cracks

We have started a preliminary investigation into an existing concrete slab structure from the 1950's. I'm not sure of what the framing system is. The owner is concerned about continuous cracking of the slab in what is described as an alligator pattern. It appears that there is a concrete base slab (about 6 inches thick), coated with ironite and topped with about 2 1/2" of concrete. The cracking is only in the concrete topping and is aggressive enough to pop it loose in spots. Some areas have been patched and are popping loose again.

My presumption is that the expansive property of the ironite is what may be causing the topping to pop loose. Any thoughts on how to neutralize this other than grinding it off and replacing the topping?

RE: concrete topping cracks

None. Remove the topping. Sounds like it probably had too much water in it when placed.

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 - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. 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