Off-Form Grey

Off-form concrete elements are most commonly produced using grey cement. The high quality of the moulds and the quality assured manufacturing techniques used by RAMCO Precast means that the quality of finish is extremely high and generally requires no additional finishes to be applied, other than perhaps stain or paint.

For variation, false joints and rebates can be incorporated into designs, or alternately many precast manufacturers are able to include colour pigment into the concrete mix.

The Australian Standard AS3610.1 – 2010, Formwork for Concrete describes the benchmarks for off-form grey concrete. It defines in detail the characteristics of the classes of surface finish with Class 1 being the highest standard and Class 5 the lowest.

Class 1 is only recommended for use in very special features of buildings of a monumental nature and must not be specified for whole elevations. Class 2 is the most common specification for high quality architectural precast concrete.

Whilst AS3610 can be used to evaluate the quality of surface and tonal colour range of grey concrete cast against the mould, the standard cannot be directly applied to troweled surfaces, applied finishes or coloured concrete.

For evaluation of these surfaces the Standard requires that samples of the finish and colour are made to manage the quality of finish and the acceptable variations in colour for the project.

Note

Concrete is made from natural raw material, so while we take care to ensure you achieve the desired outcome, expect aggregate and colour variations and imperfections in precast.

Photos and samples are an indication only and can vary in colour, shape and texture, there is no guarantee that your precast project will look exactly like the sample that you have viewed.

Architects and builders, please be aware that minor patching/repairs may be required due to handling, transportation and installation- these are likely to be noticeable.