Repair of Spalling on Precast Girder

[J1D]

A precast girder is damaged at the end as shown. Would anybody suggest how to repair. It is 70MPa strength concrete with prestress strands.

Thanks in advance

j1d

 

[graybeach]

I don't think I would repair it. Getting a good patch would require further digging in to the concrete. I would probably recommend that the owner reject the beam or accept it and get a credit from the contractor.

 

[bridgebuster]

If it's an interior box beam leave it alone. If it's the fascia patch it - otherwise some passerby (or future bridge inspector)will think the bridge has a problem. You could drill in some 3/8" hooks to hold the patch.

 

[J1D]

graybeach, the damage happened during transportation by the owner.

bridgebuster, does the drill hurt the concrete? Or I need wire mesh in the patch?

Thanks
j1d

 

[bridgebuster]

The hooks won't hurt the concrete. You won't need much embedment for a 3/8" hook. The idea is to have a mechanical bond to hold the patch matrial. Corners can be tough to fix.

 

[BridgeEI]

Could you patch it and just wrap the end with a Fiber reinforced Composite?