×
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

grout testing

grout testing

grout testing

(OP)
I'm getting testing results from grout used in pressure-grouted auger piles, and the 7-day results reflect approximately 50% of the desired 28-day requirements, but the 28-day breaks are all fine.  Is this typical of grout?  Concrete usually yields approximately 70% of design strength at 7 days.  Is it the difference in testing methods (cubes for grout vs. cylinders for concrete), or maybe the aggregate in the concrete affect early compressive strength, while grout can't.  Just curious.

RE: grout testing

Technically, the only strength test you are REALLY interested in is the 28 day, that is the basis of the design.  The "standard" 3, 7, and 14 day tests were really developed as a guide for formwork removal.  I believe you will find that each mix design, whether concrete or grout, will have a different rate of strength gain.  In your case there is no form work removal with an auger cast pile, however the intermediate tests could be used as a basis to install the next structural element.

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


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