Granufin® free-flowing pigments and the Granumat® concrete color metering system are so innovative, they were granted U.S. patent 4,946,505. Granufin® is a pigment granule with a binding ingredient that enhances color development when mixed into concrete.
The Granufin® micro-granule and color metering system was invented in 1989 by Brockhues, a German company and leader in supplying European concrete paving material manufacturers. In 1995, Brockhues joined the parent company of Davis Colors. Granufin® products are available through the Davis Colors’ North American distribution system. Together with Hydrotint® liquids and economical powder concentrates, Davis Colors offers every form of color available.
A Complete System
The Granufin®/Granumat® color system includes Granufin® micro-granulated pigment and Granumat® equipment, which automatically weighs and transports pigment from bulk storage directly to the concrete mixer in a completely enclosed automated batching operation. For many concrete producers, automated metering can be a more economical method for producing colored concrete. Granufin® colors are free-flowing, easy to handle and virtually dust-free for a cleaner manufacturing plant. They come in bulk super-sacks weighing between 882 to 2,866 pounds to further minimize transportion and handling costs.
Granufin® begins with highly concentrated pigments that are turned into a liquid with high-speed grinding equipment that coats individual pigment particles with color-activating agents. The liquid is then sprayed into fine droplets and dried. It is during this spray-drying process that micro-granules are formed and the color-activating agent solidifies, binding individual pigment particles together into nearly perfect spheres with a water-receptive surface that range in size up to 300 microns. When stored and transported, granules stay hard. When wet, they rapidly dissolve into the mix.
The primary ingredient is concentrated Synthetic Iron Oxide pigment, high-quality Red, Yellow or Black grades that meet or exceed ASTM, DIN and British standards for fade resistance and concrete compatibility. Carbofin® is a granulated carbon made in a proprietary process to prevent carbon fading. Granufin® Magnit D Super is enhanced with Carbofin for extra tinting power. The binder ingredient in all granulated products is a commonly used concrete plasticiser which rapidly breaks down in water and increases tint strength above ordinary powders.
A Shade for all Uses
Four primary colors are standard: Black, Yellow, Light Red and Medium Red. These can be combined on-site to make a wide spectrum of popular concrete colors. In addition, there is a selected range of brown, buff, gold and tan Granufin® colors available in 55 pound bags as well as bulk-sacks for clean and convenient handling without automatic systems. Granulated versions of Titanium Dioxide White and Chromium Oxide Green are also available to complete the color palette.
Every bulk-sack of Granufin® is shipped with its own inspection certificate verifying that the batch was tested for color shade and tint strength meet our precise quality standards.
Double the Density
Granufin® micro-granules pack into a volume that is nearly 1/2 the size of powder pigment, increasing storage space available in your operation.
Contains no Water
Up until now, the easiest way to automate color metering was to install a liquid color system. With Granufin®, now you can automate without the hassle of making slurry-on-site or purchasing premanufactured slurries which contain up to 40% water. In some zero-slump manufacturing operations, the water added by slurry is enough to cause mix problems. With Granufin® free-flowing granules and the Granumat® metering system you get all the handling advantages of liquid with less than 1% water content.
Color you can rely on
Granufin® by Davis Colors, division of Venator Materials Corporation, the leading pigment supplier to the concrete industry. We offer automated dispensing equipment, installation and start-up assistance, color formulations to match your product standards or custom color requirements, and ongoing technical and marketing support. Nobody knows concrete color better than Davis Colors”.
Contact Davis Colors” for complete product specifications and to discuss whether a liquid-based, granulated or concentrated powder pigment system best suits your production requirements. You can call us at one of the numbers listed below or email us.
+ / – 5% (DIN 53237)
Color Accuracy (Delta E)
< / = 1.5 (DIN 53236)
7 – 9 (DIN/ISO 787/9)