What does a standard concrete slab mix mean?

The term ‘standard concrete’ can mean actually mean a few different things. The meaning of the term depends on the context of whether you are referring to the


A standard mix throughout Melbourne is generally grey in colour. Sometimes this hue is referred to as ‘a Portland grey,’ and it usually contains a variety of either dark grey/black aggregate (stones), white pebble, or a mix of both.


The alternative to a grey slab is a coloured slab. Coloured decorative mixes are available from producers such as Hanson, Vic Mix, Mentone or Boral. If you are trying to choose between a grey slab and a coloured slab, keep in mind that standard grey slabs are generally less in cost than a coloured decorative mix, so if you have budgetary concerns you might want to stick to a grey slab. Even without considering the cost difference, many clients prefer a standard mix to a coloured mix in any case.


The standard strength/hardness of concrete can be around 20mpa, but this is actually not the correct hardness for concrete polishing. 20mpa is too low for concrete polishing and it’s important to have a minimum of 32mpa. With at least 32mpa or higher, you can achieve a durable, attractive and long-lasting polished concrete floor. Having at least 32mpa also helps ensure the right gloss level. And this level is even higher for nil exposure floors (often considered the ‘industrial look’). Nil exposure floors should have either 40mpa or even 50mpa.


In regards to the way slabs are poured, generally speaking, there are several pour varieties. A standard pour typically refers to on-ground slabs, suspended slabs or a mixture of both. Usually, though, when discussing polished concrete, the term ‘standard concrete slab’ means the colour of the mix and the strength/hardness of the slab, so a standard slab rarely refers to the type of pour in the context of polished concrete.

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