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.


Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Cold joint, and concrete blocks by comparison?

Cold joint, and concrete blocks by comparison?

With regards to ICF homes, and vertical wall pours..

If a contractor significantly delays between pours and a cold joint occurs, how is this any different than blocks and mortar?

In this scenario, there is sufficient rebar traveling perpendicular to cold joint.

Seems to me that building residential walls with concrete blocks and mortar with occassional rebar amounts to many many intentional cold joints.

Are they both weak? Suspect to water infiltration?

RE: Cold joint, and concrete blocks by comparison?

Yes and Yes.

RE: Cold joint, and concrete blocks by comparison?

A cold joint (the code refers to this as a construction joint) in concrete will always be superior to masonry. The bond between mortar and block is much weaker than concrete to concrete.  In addition, rebar minimums are higher in concrete compared with masonry.
Water-blasting the construction joint will improvement bond.  However, depending on how the ICF blocks are laid, this may not be possible.

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!


White Paper: Agile Product Engineering and Improved Product Outcomes
Today’s product development cycle is fraught with difficulties. Increased demands for complex functionality and reduced product development windows cause engineering teams to borrow practices from the IT industry, swapping outdated serial workflows for a more flexible and collaborative design method known as Agile Product Engineering. 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