Fast-setting Concrete for Larger Projects

[rdaa]

Hello, I have a small problem: I want to cast a larger structure (about 50x50x30 cm) but don't have all the time in the world, so I'm looking for tips on fast-setting concrete/cement, preferably setting within an hour or so. I've searched the internet but only found sealing concrete that only works in castings less than 3 cm, and this is about a freestanding structure entirely built from this material (and reinforcement, of course). Thanks in advance!

 

[MC-HiTech]

An hour? Not a bad requirement. Epscement takes about 12 hours and it's easy to work with, a 50-liter bag weighs 17 kg, it contains frigolitpellets so you get an insulating effect at the same time. Check here http://www.epscement.com/

 

[anaitis]

There is a very high risk of shrinkage cracks due to the temperature effect with the type of casting you are considering.

 

[rdaa]

How the result looks doesn't really matter, but the time for the casting is the most important factor, but I have somewhat realized that this is impossible, considering plaster instead, how long does it take for plaster to set?

 

[rdaa]

An hour? Not a bad requirement. Epscement takes about 12 hours and is easy to work with. A 50-liter sack weighs 17 kg and contains polystyrene pellets, so you get an insulating effect at the same time. Check it out here [link]

That was a good thing, but unfortunately way too long, but thanks anyway, it might be valuable for other things!

 

[LLLVäxjö]

So you're planning to cast many such blocks and only have one mold, or did I misunderstand?

If you want many identical concrete items, it's common to use earth-moist concrete, meaning concrete with less water that has a consistency somewhere between crumbly and sticky, depending on the product's height. You fill the mold while vigorously vibrating and then can turn the item out onto a plate and start the next one.

It might be difficult to mix in a tumbler though...

 

[Fredrik.engdahl]

there is "gjuta enkelt" which starts setting in 1 minute

costs just over 70:- for 25 kg

http://www.finjabetong.se/App_Resource/Product/PDF/PB/1775-172-1.pdf

 

[marten70]

Hello rdaa!

Look for a retailer of ARDEX products, there you can find quick-setting cement that meets your needs without any problem,
the problem then becomes the cost!!

 

[marten70]

I might as well mention which product I am referring to!!

ARDEX EB 2 is also available pre-mixed..

good luck,

mix it only to earth-moist consistency and pack it well.

 

[rdaa]

Hi marten70, and Thank you!
That was exactly what I was looking for, big thanks to you!

 

[BOY-GP]

Deitermann has developed a product used for embedding floor drains, where you should not use regular concrete due to the long curing time and the risk of shrinkage cracks.

 

[Jensa1]

Hello, I have a small problem: I want to cast a larger structure (about 50x50x30 cm) but don't have all the time in the world, so I'm looking for tips on fast-setting concrete/cement, preferably one that sets within an hour or so. I've searched the internet but only found sealing concrete that only works in castings less than 3 cm, and this is about a standalone structure entirely made of this material (and reinforcement, of course). Thanks in advance!

Go to Maxit.se and you'll definitely find concrete that suits you; I could recommend Exm 711 or Exm 712, they set in about 45 minutes!
I work at maxit!