Spalled Spancrete

[Thoughtclaw]

I was just called out to inspect some fresh spalling in a Spancrete panel at a car dealer/service shop. The photos show the bottom half of an 8" panel that has 2" of concrete poured overtop. We had a brief but intense rainstorm here yesterday, and it's not clear whether the spalling happened at that time, but nobody noticed it until yesterday. Apparently there was water pouring through it yesterday. There is no rebar exposed; the spalling seems to be less than half an inch. This is in a basement, and there is a column above that spot. The center of the column is 6-1/2" from the outside wall, and the pilaster that shows in the photos is 8" block, meaning the column is surely exerting some force outside the edge of the pilaster. I don't think this is an emergency, but I'm thinking it'd be a good idea to lay up a second pilaster next to the existing one. I was initially thinking a steel column, but because of heavy equipment in the room it's in, that would be far costlier because the equipment would have to be moved. Does anyone have any thoughts about this? Anyone think it's unnecessary?

Obviously, the water problem is another matter, but we can address that separately.

Thanks in advance!

 

[Thoughtclaw]

Apparently only one photo uploaded; here's another one.

 

[Ingenuity]

I would be investigating the probably cause before I proceeded with any repair or supplemental support. The water problem may be directly related.

Locally shore the floor panels (and supporting column over) and chip and remove the spall and take a visual of what is happening. If there is a column above that spot then the Spancrete panel cores are probably 'core-filled' or maybe not!

The water-damage looks old based upon the black-color staining and bubbling paint.

What is the age of the facility?

 

[Thoughtclaw]

Thanks for your input, Ingenuity. It was built in 1999.

 

[Ron]

I would suggest coring the section and having a petrographic examination done. This could be the latent result of a horizontal crack that has been present for years.