Hello
I have cast plinths with electrical pipes/hoses in them for bollards. On top, I placed the mounts for the bollards of course. But I'm not satisfied with the surface, as I used coarse concrete. What can I do to level the surface? Sanding isn't an option since the mounts are in the way. Is it possible to apply a thin layer of fine concrete, and will it adhere to the other concrete? Or is there some other suitable type of outdoor filler?
I should add that the plinths are 7-8 cm "too large" around, so it looks a bit unsightly if I don't get it sorted out.
Do the bollards cover the entire middle of the plinths?
Are there many plinths?
I would probably try to just "smooth off" the top of the plinth outside the bollard mount with an angle grinder.
It doesn't have to be that perfectly done.
Place something that draws attention at the top too, so no one notices the irregularities
If it's cast in paper tubes, that should be removed too?
I'm not that confident with the angle grinder to try it... But putty or fine concrete should work, right? I expect the cardboard tubes to come loose/dissolve when the autumn rain starts There are 4 posts.
There is something called repair concrete - it's a cement mortar that works well for fixing. Fine concrete is too coarse for handling such small tasks.
There is something called repair concrete - it's a cement mortar that works well for fixing. Fine concrete is too coarse to work with such small tasks.
Regular repair concrete typically isn't that good for repairing thin layers in my experience. And here it seems more like the OP wants to fine layer the surface, which would then probably only be a couple of mm thick.
There are repair mortars that can handle thin layers, one example is StoCrete, which can be applied down to 3 mm, but it costs more than gold for a bag.
No, not offhand but just check out, for example, Weber's website. It should be fine-grained. I think the fine concrete is 0-5 but here I would use something much finer. Maybe a 0-2.
There is also concrete filler - I have used it to repair cracks. Contains alumina cement and cures very quickly. Available in cartons at the paint store. Expensive but with it, you can achieve a beautifully smooth surface. I would guess it's around 0-0.8. Mix very little at a time.
Or why not just use cement and water - that will work fine!
