Maximum plug / Quick-setting concrete

[majkball]

Hello,

I need to seal and fix reinforcement bars in drilled holes in concrete/rock. It needs to be watertight and cure quickly so that even deep holes cure fast.

I think well drillers use a similar substance to seal against the casing in the hole.

Something like this: http://www.drizoro.com/Ingles/documentos/Fichas/ingles/maxplug.pdf

But that seems like an extreme variant since there's absolutely no pressure where I want to seal. Simply a similar product that's preferably available off the shelf from a regular hardware store.

 

[majkball]

Received a tip from the hardware store that when mixing regular coarse concrete, you can replace some of the water with moisture stop, which will then act as an accelerator. With the right proportions, it should be possible to achieve a mixture that sets in a few minutes.

 

[smurfen72]

Hilti's Hit mortar applies well and cures quickly, there's a similar product from Essve that works with a caulking gun and likely performs okay.

 

[corre]

Expanding concrete is used which sets fairly quickly. It is mixed as a slurry in smaller volumes and poured into the hole before the reinforcement is pressed in.

How quickly do you need it to cure?
Chemical anchors set immediately otherwise, and a little sealant on top afterwards for sealing.

 

[majkball]

Feels like I've been taken for a ride by the hardware store... tried three different concentrations of water/moisture stop/concrete, but 1 hour later none of the piles are fully cured. If I lightly tap with my finger, it just crumbles.

I need something that cures in 3-5 minutes. The conditions are 30mm drill holes in concrete/rock and 25mm rebar. I don't want to have to hold/fix the rebars for a long time, after 3-5 minutes they should be so securely fixed that they can't be moved a millimeter.

Chemical anchors would probably work but it would require quite a few tubes at a not-so-cheap price, so I would prefer a cheaper alternative that still cures quickly.

 

[smurfen72]

Bemix or betec that you mix with lukewarm/warm water hardens quickly as heck.

 

[myrstack]

Even with warm water, I assume that the cooling effect from the cold mountain will slow the whole process down, but some kind of quick-set expanding concrete should work.

 

[Samothsor]

Search for Prompt, a fast-setting cement. Very common in the water and sewage industry where quick repairs of wells and concrete are needed.