The picture below shows a veritcal construction joint of an approximately 50 years old reinforced concrete industrial structure. The expansion joint was likely originally sealed with a flexcell which due to age and water ingress has deterioriated and come away from the joint exposing a peforated metal pipe.
My question is does any one know why the pefortated pipe was installed there originally approximately 50 years ago? Does it have a drainage purpose? The joint should have been waterstopped. Is this a second line of defence? If so where do you expect it to drain to? Has anyone seen a similar detail to this before?