Colours in GFRC

Colours

Production and use of coloured glassfibre reinforced concrete products, GRC / GFRC, has become very common, and they can be used to a great effect.

Coloured GRC GFRC is often “coloured-through” and this is generally preferred to a GRC /GFRC with a painted surface (see also Surface Finishes and Textures). Any type of pigment, both in powder form or as water-based suspension, can be used provided it is compatible with cementitious matrix and its alkaline environment.

It is difficult to predict accurately the colour of the final hardened GRC. Production of trial mixes and prototype elements is therefore essential in order to agree on the colour and much variation in its shade will be acceptable. Coloured GRC requires a particularly high level of control of the production process to ensure a uniform distribution of the pigment within the body of the composite.

Surface treatment (see also Surface Finishes and Textures) may have to used if a very high level of colour consistency is required.

see also Surface Finishes and Textures

Other GRC Inspiration

GRC presents architects and engineers with a material from which the most ambitious designs can be created. It can be moulded to form modern futuristic designs or to replicate traditional historic features. GRC can be painted, faced with fine aggregates, coloured or simply left with a natural white or grey, smooth or textured finish.

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