Can Exposed Aggregate Concrete be placed over existing concrete?
Yes – provided certain practices are in place. It is best to discuss your particular situation with us at the time of choosing your mix.
Does Exposed Aggregate Concrete require reinforcing mesh?
This is most important, as it helps reduce and control the incidence of cracking. Most cracks are formed within the first 24 hours of the concrete being placed but only become noticeable at a later date. Properly placed reinforcing mesh and acceptable concrete slumps are two ways to reduce the potential for cracking.
Does Exposed Aggregate Concrete require Expansion Control Joints?
Yes – carefully planned Expansion Control Joints are also essential and are used to reduce the potential for random cracking. Methods used include:
- Saw Cutting
- Aluminium Strips
- Rubber Foam
Sometimes the clever use of pavers or bricks can disguise the crack control joint.
Should Exposed Aggregate Concrete be sealed?
Yes – after your job has been laid and acid-washed correctly, it is advisable to seal your new investment. This will:
- Offer some protection against staining
- Enhance the natural colours of aggregate in the mix design
Can any Concreter lay Exposed Aggregate Concrete?
No – we strongly advise you to use one of our Preferred Contractors that we have specifically trained to apply our products. However, if you are an enthusiastic concreter who would like to become a Mentone Premix Preferred Applicator then please contact Gary or Glenn Finemore at Head Office for further details.
What is polished concrete?
Basically, there are two methods for polishing concrete and then variations of them.
- Grinding the surface of concrete (old or new) until it is flat, then applying a sacrificial surface sealer.
- Again grinding the concrete surface flat (old or new) then applying surface treatments to start the polishing process.
What are the different variations?
Polished concrete variations include:
- Minimal exposure with high sheen
- Minimal exposure with low sheen
- Full exposure with high sheen (Preferred)
- Full exposure with low sheen
What does exposure mean?
(Full Exposure) All High strength polished concrete will contain aggregate. This is a necessary ingredient. However, we can have control over the colour, shape and size of the aggregate. These aggregates may include Quartz, Basalt, Granite, Rhyolite and pebbles to name a few. By Choosing the aggregates and matrix colour then grinding this combination to see full stone (full exposure) will have stunning results.
What is Minimal Exposure?
Refers to levelling the finished concrete surface by grinding, so high spots of the concrete surface would reveal some stone and low spots would reveal little or no stone, random or salt and pepper finish, with that rustic look and very impressive.
What does Sheen relate to?
Both these finishes are sealer-less as they have been treated with Mentone Premix by mechanically sealing the polished concrete surface.
- High Sheen – It is the level of light reflection from the polished concrete surface. High sheen almost a mirror finish, with optimum light reflection saving on energy costs.
- Low sheen – Creating moderate light reflectivity but still with low maintenance and ease of cleaning.
When should we contact Mentone Premix about our concrete requirements?
As soon as possible just phone or bring your plans and visit our showroom for the right advice.
Is polished concrete expensive?
The cost of polished concrete is comparable to timber and or tiled floors but with excellent longevity.
At what stage can we polish the concrete?
After the concrete has cured, this is normally around 14 days.
Can you polish concrete externally?
You can, using a process called the Pavilion Finish. This has been developed to give a decorative non-slip finish which is ideal for pergolas, pool decks, outdoor kitchens, and other external areas.