Hello,
I'm going to erect an aerated concrete wall (Aeroc) between an outer wall of blue concrete and a chimney of brick. I plan to attach the new wall to the blue concrete by slightly angling in aerated concrete screws. That should probably not be a problem. But I'm concerned about the other end, the one connecting to the chimney, which of course gets warm sometimes. I initially thought of using plugs, but that might not be the best idea considering the heat... The brick is hard, so it can't be screwed without pre-drilling. Does anyone have any suggestions? Should I pre-drill and fill with some kind of compound and then screw in a screw? What product would be best to fill the holes with? :S
I'm going to erect an aerated concrete wall (Aeroc) between an outer wall of blue concrete and a chimney of brick. I plan to attach the new wall to the blue concrete by slightly angling in aerated concrete screws. That should probably not be a problem. But I'm concerned about the other end, the one connecting to the chimney, which of course gets warm sometimes. I initially thought of using plugs, but that might not be the best idea considering the heat... The brick is hard, so it can't be screwed without pre-drilling. Does anyone have any suggestions? Should I pre-drill and fill with some kind of compound and then screw in a screw? What product would be best to fill the holes with? :S
You can't use rebar that you cast in place?
Yes, maybe. But the new wall is only 100 mm thick, so it would be quite a substantial intrusion into the stone to drill holes for rebar, but of course, it's fully possible. But screws/nails should be sufficient in thickness, right? I've seen there is so-called anchor mass that I might use to "cast" with in the drilled holes, such as Essve CM 300.
I'm also considering using just glue instead. There are some substantial construction adhesives...
I'm also considering using just glue instead. There are some substantial construction adhesives...
Thanks by the way, it turned out as you suggested. In the chimney, there was no need for casting. After drilling, it was just a matter of knocking in the rebar into the holes so they were fixed. In the aerated concrete block, I then drilled holes and filled them with anchoring compound from Sika before I laid the stones in place. One rebar in each layer of stone.
Yes, you are absolutely right. Anchorfix should be kept under 80 degrees short-term, 50 degrees long-term. I don't know how hot it gets in that part of the chimney stack, but I don't think we get close since it's some distance from the fire. There is also an insert stove in the fireplace (which we almost never use, but that may not be relevant). Even if you consider the extreme case of the plastic melting, the irons would at least prevent the wall from tipping over since they come in on the short side of the new wall, so to speak. I might need to consider making a mounting from the outside as well (without plastic plug...).