The current proposals involve:
- Removing the loose sections of concrete,
- Crimp snapped wires with crimped sleeves,
- Drill grout flow holes at either side within each core,
- Roughen exposed concrete,
- Vacuum clean cores, clean with water and allow to dry,
- Form grout stops,
- Shutter, add...
Not drainholes on this project at least - I've read that they are sometimes used for services - essentially it's one of these (though not by this manufacturer) - https://www.bison.co.uk/products/hollowcore-floors/
The impact was caused by the bit of rubble/slab you can see in the top picture...
The previous photo was of the top, and this is the soffit.https://files.engineering.com/getfile.aspx?folder=c9ff02e5-411b-43b7-8420-7ee21dd43a34&file=Screenshot_20210410-183058.png
Definitely some things to think about here...I'm in the UK so maybe I should have described them as hollow core floors...I've attached a picture for reference. The wires are 4mm (1/6"?) in diameter, 2 per strand/rib. I don't think that they are keyed to the other floor slabs...
I'm working on an existing building, where the demolition team have broken one of the existing hollowcore floor planks - part of the impact load has caused the wires on one of the ribs to break and concrete to break off from the soffit across 70% of the width (probably over the middle quarter of...
