If I only need to use part of a GFRC Worktop Mix or Cast In Place Mix, what amount of water and fibres do I need?

The approx ratio of water is 14-15% to the GFRC Worktop Premix. The ratio of fibres is approx 3% of the weight of dry powder.

So the methodology is as follows;

Weighing Out

1. Preblend your dry mix first to ensure all ingredients are well distributed.
   2. Weigh out your desired amount of dry premix ( X amount of Kg)
   3. Multiply X by 0.144 = weight of water in Kg
   4. Multiply X by 0.03 = weight of fibres in Kg

So for example a full pack contains 21.67kg of powder. This requires 3.12 litres of water (always use the superplasticizer with this to make sure it flows nicely).

So lets say you're weighing out 10kg of mix, then you'll need 10 x 0.144 =1.44 kg of water.

Mixing

Gradually add and mechanically mix the water into the premix powder until all lumps have gone. It should be like a thick milkshake with bubbles coming out of it!

Now add the fibres. Blend them into the mix for no longer than 3 minutes so as not to break them up too much.

Now pour!