Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

column cracking cont.

Status
Not open for further replies.

struct_eeyore

Structural
Feb 21, 2017
255
I previously posted about top of column cracks due to plastic settlement and shrinkage, and have a follow up post to get some opinions. The contractor used insulation foam to close off the forms between the beams and columns. The foam (surprise!) over-expanded into the column cross section, and at this point I have no doubt contributed to the concrete already cracked and weakened by plastic settlement. Based on the photos below, it also looks like the columns and beams were poured at the same time. I'm a bit exasperated with the amount of screw-ups here, and debating if some of these columns should be scrapped and re-poured completely, or if the damage can be routed and patched w/ n.s. repair mortar and FRP. A couple of these columns are also meant to act as portal legs - fyi.

1_qwagcc.jpg
2_difmaz.jpg
 
Replies continue below

Recommended for you

You are correct about the sequence of placement, and that alway results in plastic settlement cracking if revibration is not done. The tops of the columns could be recast, but maybe the contractor who screwed it up should not be entrusted with the repairs. Steps should be shore, saw an inch or so deep around the perimeter, chip out the remainder, and recast. The last part is a bit tricky.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor