×
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!
  • 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

Jobs

Mud Jacking Specification

Mud Jacking Specification

Mud Jacking Specification

(OP)
I have a project where a homeowner had some cracking and settlement in his basement floor slab.

After coring through the slab we found voids ranging from 1/16" to 1/2".  The slab is underlain by a pea stone below-slab drainage system.

We would like to grout the voids and raise the slab slightly in a couple of areas where it settled.

My fear is that if the grout is too thin it will infiltrate the voids in the pea stone and render his below-slab drainage system useless or at least reduce its capabilities.

Has anyone had experience with this type of problem?  If so, how do we test the grout to ensure it is thick enough?  Is there a maximum slump or a flow cone value that would be appropriate?

Thanks is advance!

RE: Mud Jacking Specification

The original use of pea stone is the problem. Round stone settles because it does not have a locking surface. Knowing the original GC screwed up doesn't help now. My reco.....since the pea stone has probably found equilibrium, lay thinset (with fiberglass mixed in) on top of the areas that have settled.

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