Repairing Post-tension slab

[JohnB001]

Hello, can anyone guide me in the right direction here.
I am working on a project where the building is facing the beach and the garage slab (post-tension), is cracked and some areas have a delaminating portion Of concrete completely fallen and leaving the tendon exposed.this area is the edge of the slab facing the beach, which was caused by corrosion

See pictures..

I am to provide a repair plan for the slab.
Please mention any reference in the code that can be useful or good tips from your experience.
I have worked on column and beam repair previously but never a post-tension slav, which I know it is a different ball-game.

Also any ideas what are the tiny holes in the slab? Any purpose?

 

[Ingenuity]

From the recent photos you have posted it is definitely NOT a PT slab.

That last photo with the lengthy edge spall appears to be to a cell/core of the plank.

Same “rules” apply - do a thorough field investigation to document the extent of damage so you can design repair details etc.

 

[mrlm]

Hi Rapt,
I think the photos still show the same thing. See attached for reference.

That crack shown in the photo on the left is hidden or shadowed by the direction the photo was taken on the right. But I believe the crack can still be seen.

 

[JohnB001]

Can you please provide good design reference guide to repair that big hole in the concrete? Or tips based on experience? Assuming exposed tendon are also corroded. Thanks!