Mixing GFRC Concrete using Concrete Lab additives

In this 10 minute video, you will learn how to carry out a basic mix using our concrete additives.

PROJECT

The mix is for concrete wall tiles which were required in a very short space of time.


EQUIPMENT USED

Forced Action Mixer - available on our website (www.concretelab.co.uk)
Gauging Trowel


ESSENTIAL PPE

Gloves
Goggles
Respirator/mask


MIX RECIPE

25Kg Rapid cement
25kg Coarse graded silica sand
250g Flowcrete (1% cement ratio)
62.5g Superplasticizer (0.25% cement ratio)
1.25Kg White dye (5% cement ratio)
750g Alkali Resistant Glass Fibres (3% cement ratio)
7.25Kg Water (29% cement ratio)
50g Citric Acid (0.2% cement ratio)


NOTES ABOUT MIX

The mix uses rapid so to counterbalance the fast set citric acid is used. This will give approx 15-30 minutes working time depending upon ambient conditions.
The fibre​ content is half of a standard GFRC mix because we are making decorative tiles which do not require as much reinforcement as other products.
Because we are making wall tiles we did not use a pozzolan in the mix.

As you can see at the end of the process the mix is completely self-consolidating (SCC) or self-levelling which is perfect for flat concrete tiles.

Also because we blend the sand with the water with no cement at the beginning of the process, no waiting time is required for the sand to fully hydrate.

If you have any queries please ask us in the comment section, or get in touch via our website at www.concretelab.co.uk.