Cemcraft PXR Max - High-Range Water Reducing Superplasticiser - 12.5 Litres
Cemcraft PXR-Max - High-range Water Reducing Superplacticiser - 12.5 litres
Cemcraft PXR-Max is a new generation superplasticizer – high range water reducer, based on modified polycarboxylate. It is specifically for use if you are using additives such as Microsilica or AR Glass Fibres in Glass Fibre Reinforced Concrete - either of these materials will make the concrete very stiff and hard to work. If you plan on using one of the materials as a part of your concrete then you should be using Cemcraft's PXR-Max.
A Water Reducing Plasticiser 'does exactly what it says on the tin'. While concrete requires water to activate the powdered cement and turn it into a glue - too much water in a mix causes a number of problems. It's not unusual to see someone add 'a little' extra water to a mix to make it 'more workable'. However, if you add as little as six litres of water to a cubic metre of concrete you reduce the strength of that concrete dramatically. You also increase the amount of 'bleed water' - the excess water that rises to the surface of a slab poured in situ.
Either of these problems will cause problems when creating concrete worktops or decorative flooring. Cemcraft's PXR-Max is used as a substitute for that extra water, still giving you a workable mixture without the loss of strength. An additional benefit is that because it reduces the amount of water in a mixture, colours are more vivid, a distinct advantage when working with pigments. Additionally, it will give you a more stain resistant and denser concrete which will polish to a better finish.
Cemcraft PXR-Max is designed to be used in Concrete - It is NOT for use in Mortar, Render or Floor Screeds.
PXR-Max is a plasticiser which due to its specific formula results in an increased dispersion of the particles in concrete.
PXR-Max optimises the dosage of cement needed to be used to obtain a given compressive strength.
For an equivalent plasticity and after reducing the quantity of mixing water:
The concrete is denser,
There is reduced capillary action,
Depending on the dosage, there is an increase in compressive strength after 24 hours.
Cemcraft PXR-Max has water repellent properties and can therefore be used to reduce the permeability of the concrete.
Dosage: Use between 68ml and 675ml for every 25Kgs of powdered cement. A dosage of 225ml for every 25Kgs powdered cement is usually a good starting point.
Shelf Life - 18 months.
You can find any of our Product Guides by clicking on the link below or they can be found under the 'Info' tab located at the top of any page in our shop.
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