Cemcraft PXR Max - High-Range Water Reducing Superplasticiser - 5 Litres

£28.95


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ID: 287


Cemcraft PXR-Max -  High-range Water Reducing Superplacticiser - 5.0 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.

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