×
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

Rebar strengthening in concrete

Rebar strengthening in concrete

Rebar strengthening in concrete

(OP)
I have a roof where from some areas (say 1% of total roof)concrete has spalled off and rebars are also rusted considerably. I can recommend various ways to patch up concerete but what about section loss of rebars. How to improve or bring at par with origianl cross-sectional area.

RE: Rebar strengthening in concrete

The first thing to consider is how the rebar got to the state that they are in.  Control the corrosion problem first.  Make sure that your proposed fix does not cause different problems with corrosion.

Cut slots in concrete next to bars with section loss.  Make slots long enough to develop new bars (as well as long enough to resist bending load).  Epoxy bars in place or use some proprietary concrete appropriate for your application.  Take care that new concrete will bond with old concrete (bonding agent may be required).  Safely removing the concrete and cleaning the concrete are very important to this process.  This process is manpower intensive.

Alternative to replacing rebar is adding frp or cfrp to your section.  This is an expensive product, so it is not always a good alternative.

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