×
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

Reuse of Rebar

Reuse of Rebar

Reuse of Rebar

(OP)
Is it possible to reuse rebar?  For example, lets say I have an existing flat structural one way concrete slab 12 inches think.  A 12" ramp needs to be built in to it.  Can I remove the concrete around the rebar, cut them to the required lap length, and bend them down to the ramp slope, and pour new concrete on the sloped ramp portion?  Are there issues with bonding the new concrete to the existing rebar?

RE: Reuse of Rebar

yes this concept is used widely in many structures but you must use Epoxy material to bond the new concrete to the old one and also must roughten the surface of the old concrete before poring new concrete

RE: Reuse of Rebar

I agree with dawn836 regarding "reuseing" the rebar, which actually is just leaving the existing bar long enough to lap (development length) into the new section of concrete.  However, the comment that you MUST use an epoxy bonding agent is not necessarily so.  This connection was made for many years prior to the advent of epoxy bonding agents by wetting the existing concrete, brooming down a sand/cement grout and then pouring the new concrete.

Epoxies come in handy for lots of applications and patching jobs, however, they have their limitations too.  For one thing, their coeff. of expansion is very different than that of concrete, so in areas of large tempeture ranges, you must be careful how you use them.

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