Ask. Answer. Discuss. Any bolting related issues.
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There is only one epoxy adhesive that works properly. Hilti RE500. Most other epoxies are mortars not adhesives. Mortars are fine for gluing in bolts where there is a close tolerance between the bolt and the wall of the hole. They will not work for gluing on holds; so adhesive it is. You can fill the cracks around the hold with glue and hope it stays in place, or (much better) break the hold off scrub it clean then glue it back on. This creates a large gluing area that is far stronger than simply gluing around the edges. The snag comes in that RE500 takes 24 hours to set so if the hold is large and heavy you need to engineer some way of holding it in place while the glue sets. For small flakes the glue is probaly thick enough to hold them in place, but the big stuff you will need to bolt in place. Drill a 12mm hole through the hold with the hammer setting turned off (or the hold will break) Put the hold in place and continue the whole into the rock face. You can drill a short depth, remove the hold, then finish the job. You want to drill just deep enough to accept a stainless steel drop in anchor. Put in the anchor, glue up the hold then fix it in place with a length of stainless steel m10 threaded rod and a nut. You may try applying grease to the threads so that the glue doesnt grab the rod. The rod can later be removed and the hole filled with glue. If the rod doesnt come out snap it flush with the hold and patch over with glue. NOTE RE500 is bright pink! Camouflage it by sprinkling/rubbing sand over the glue. Oh yeah and you can wipe up spills and excess glue with a wet cloth, neat. (firstname.lastname@example.org)
By the way the glue is hugely expensive (I paid R350 for a canister) It is probably way more than you need and only keeps for one month after opening. I suggest sharing the expense with someone, try contacting Mark Kruger: Krugemj2@telkom.co.za , who also has a route that needs fixing, he may be willing to share the expense with you. If you share then you will need to organise spare mixing nozzles as the canisters only come with one. Lastly and most important you will need the applicator gun (cost R800+!), I am prepared to let people use my applicator with supervision.
The anchor is to screw the threaded rod into. Anchor has threads on inside. Spose you could even try duct tape! (to hold flakes in place as the glue sets) Also leaving a length of rod in the hold, either through snapping or removing and cutting shorter then reinserting, will make for a super strong re-infoced hold. Clean the grease off well first and use a bit of glue on the outer threads keeping the part of the rod that threads into the anchor clean. Seal over with glue and sand.
In conection with developement project I have to find a glue /adhesive for gluing a small flexible PI(Polyimide) film (3 x20mm) on to a PU (Polyurethane) hose with a diameter of 5mm . If you have any sugestions to which glue/adhesive to use please kontact me on the below mentioned E-mail. Kaj Larsen Mekoprint A/S Hermesvej 4 9530 Stovring Denmark E-mail: email@example.com (firstname.lastname@example.org)
Depends on what it is that needs gluing. Hilti RE500 is the strongest glue but it takes 24-48hrs to set. Hilti also have a new version of their C100 out that has a fast cure time. It is perhaps not as good as the RE500. Gluing is a mission unless its just squirting a bit behind a flake or in a crack. Ive done some gluing that involved all sorts of mechanics to hold the flake on whilst the glue set, but Im not sure if its worth all the hassle! Just pull off what comes off by hand and then leave it, climb stuff in as natural a state as possible. If you do decide to glue just make sure that its adhesive you are using and not a mortar. Some of the mortars on the market have little or no adhesion to the rock.