Grey is the color we associate with cement based concrete.
Our color concentrates, which are Color Dispersion Additives (CDA), render attractive colors to cement based concrete. Its a cool technology to color concrete through and through. We call this Internally Colored Cement Dispersion (ICCD). It is permanent and does not require external painting.
A major advantage of ICCD is that it does not require additional water for curing and that it makes the entire Colored Cement Concrete (CCC) hydrophobic. The polymer components in the CDA renders the CCC non-porous and hydrophobic. This has the additional advantage that rain water or river/sea water cannot percolate through the concrete and attack the steel reinforcement.
Using CDA renders internal coloring to the concrete. If the surface or parts of the concrete chip, the color still shows through. It just makes concrete look more beautiful and long lasting.
As of today, most pre-cast concrete in the market is grey in color. Using CDA to make pre-cast concrete brings internal color to it. It may just be the much needed driving force to make pre-cast concrete more main stream.
When cement concrete is made, as in Ready Mixed Concrete (RMC), the CDA is added at a usage level of 4% to 8% on the cement used in the RMC. The process of making the concrete is the same and nothing changes, but the color.
CDA is the coloring component in the mix. When using white cement and white sand in the mix, the CCC mixture takes up the color of the CDA. There is no limitation to the color palette.
When grey cement and grey sand (m-sand) is used, the resultant color is influenced by the grey. As such, the color palette in this case is limited.
The images here are photographed in daylight conditions.