I'm designing some repairing works of historical stone corbels to support timber trusses.
One of the corbel was originally damaged and the design intent would be to cut the damaged part and replace it with a new carved stone element.
The idea would be to connect the new stone to the original (currently embedded into the original brickwork) with threaded bars chemically anchored with Hilti HIT RE 500 resin. I understand (from previous answers) that a bond strenght of 0.5/2 N/mm2 can be expected (subject to confirmation by testing) however could you please advise on edge distances, recommended (minimum) embedment depth etc? Also, my connection will be mainly subject to shear force. Also, is there any specific testing/research to support the application of the Hilti RE 500 resin to solid stone?
Attached is an image of the existing stone (supporting a timber truss) and the new elemnt to be fastened to the face.
Thanks for your question however we have no design data for fixing into stone however typically for substrates such as Sandstone, Bathstone, Yorkstone, Limestone etc we would suggest the HY270 resin mortar which is our most widely tested product into masonry materials whilst the RE500 epoxy resin would be more more 'rock' like materials such as Granite. Regarding testing, I would suggest contacting your local HILTI organisation as they should be able to advise you on your local national testing regime.