What strength concrete/mpa should I choose?

What strength concrete/mpa should I choose?

If you do not want to see any stone whatsoever, you should choose 40mpa or even 50mpa. This is known as a Nil exposure and is considered to be the ‘Industrial look.’ In the simplest terms, the strength of the concrete refers to the hardness of the concrete. A Nil exposure slab needs to be much harder because when grinding, we need to be able to even out the concrete without immediately grinding too deeply. Otherwise, the stone underneath the stone may end up getting exposed, which will totally change the finish.

If you want to see some of the stone, or a lot of it, then we recommend you choose 32mpa.

Some concreters offer 20mpa concrete, but that level is extremely soft where polishing is concerned. We always recommend a minimum of 32 mpa because anything less can affect the level of gloss that is achievable. Even more importantly, if the mpa is too low, that can actually influence your floor’s ultimate durability over years.

 

For that reason, we recommend a minimum of 32mpa for your floor, and if you want a Nil exposure look, we suggest 40mpa or 50mpa.

 

You might also want to be aware that for a Nil exposure slab, we have heard that it’s important for the concreter to use fresh water rather than recycled water, because fresh water minimises the risk of discolouration. However, as we aren’t specialists in concreting, it is always best to check this with the concreter who pours the slabs. At Grind and Seal Melbourne, we deal exclusively in concrete polishing to ensure that we can specialise in our field.

things you must know before choosing your concrete polisheR GET MY FREE REPORT

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