×
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

Anchor grout UCS

thread255-425135

Anchor grout UCS

Anchor grout UCS

(OP)
Experts,

In the "Foundation Engineering" forum I posted a similar question about the UCS of grout for sinkhole purposes (foundations).

Now my question is for anchors (tiebacks and rockbolts) how important in the UCS of the grout?.

I have been involved in anchor projects and engineers usually specify grout UCS between 3000 and 5000 psi.

I am not sure what is the relationship between the grout UCS and the anchor or rockbolt force.

Can anyone please explain?. Thanks

RE: Anchor grout UCS

The strength of the anchor grout is relatively unimportant. If the anchor passes its load test, the grout was good. Grout for tieback anchors is most commonly Portland cement and water with a w/c ratio of 0.45 to 0.5 or 5 to 5.5 gallons of water per 94# bag of cement. This mix should give about 5000 psi at 28 days if properly sampled, cured, stored, transported, and tested. If you are going to be involved in tiebaclk anchors, I suggest you buy a copy of the Post-Tensioning Institute's Recommendations for Prestressed Rock and Soil Anchors.
Re-read your previous thread on this same topic: thread255-407101: Tieback grout

www.PeirceEngineering.com

RE: Anchor grout UCS

(OP)
Thanks a lot PEinc for your input.

Sorry for posting this again as I did not recall having done so. I will make sure this doesn't happen again.

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