|How to use Integral Color Concrete Pigments
|Direct Colors premium iron oxide pigments are lightfast, alkali and
weather resistant. Our pigments comply with ASTM C979 when used
according to ASTM’s specifications. MIXING: For optimal results, we
recommend using the same brand of cement, aggregates, and sand
until the completion of the project, as well as the same cement to
pigment ratio. Natural ingredients can and will effect the final color.
Difference in slump may produce a noticeable difference in color
between batches. In instances where exact color match is required, we
highly recommend a test pour using the exact ingredients and ratios that
will be achieved on the site. Do not use calcium chloride as a set
accelerator; this has been known to cause undesired discoloration. The
maximum level of pigment to cement is 10% by weight, and using less
than 1% can cause a washed out appearance. Our charts and codes
are based on pounds of pigment per 94 lbs. of cement material,
including Portland cement, silica fume, fly ash, lime. Sand and
aggregates are NOT used in this ratio.
DISCLAIMER: Because the conditions of use and application of our
products are beyond the control of Direct Colors Inc., Direct Colors
makes no warranty regarding workmanship and other variables that do
not involve the performance of our pigments. Buyer’s sole remedy shall
be the purchase price paid by the user or buyer for the quantity of the
Direct Colors product involved.
|The simplest method to convert our chart to your pour is multiply the
poundage on our chart by five to discern how much pigment per yard.
You want to achieve something similar to the color San Juan on our
integral color chart. Your having 15 yards of concrete poured. The chart
lists San Juan as using 1 lb. of 543 pigment so you need 5 pounds of
543 pigment per yard which is 75 pounds. The concrete is coming in
one 8 yard truck and one 7 yard truck, so you need 40 pounds for the 8
yard truck and 35 pounds for the seven yard truck. Being consistent with
your pigment per yard ratio is critical in achieving matching pours. The
water level and mix ratios in each load are critical as well. Be sure and
know how much concrete is in the truck, not just how much they are
pouring. If the concrete plant sends two 8 yard trucks, then the truck that
is receiving 35 pounds of pigment is going to be lighter than the other
pour. The pigment doesn’t know how much concrete is in the truck!
The pigment can be dumped right in the back of the truck, using the
hose to clean off the fins and make sure no loose pigment remains to
cause streaking. Spinning the mix for ten to fifteen minutes is generally
sufficient to properly disperse the pigment. The concrete can be placed
and worked as normal.
As the concrete sets, the color will appear to fade. This is the concrete
dispensing powder on the surface and will be resolved by sealing this
as any other decorative concrete. Once sealed, the color should be
stable and considerably darker than at first appearance pre-seal.
Coloring Pre-Bagged Ready Mix
For 80 lb. Pre mixed bags, use approximately 100 grams(3.52 oz.) per
pound of pigment listed on our chart. For 60 lbs pre mixed bags, use
approximately 75 grams(2.65 oz.) Per pound of pigment listed on our
To achieve the color Santa Fe Tan in an 80 lb. Pre-mixed concrete, use
300 grams (10.5 oz.) Of 533 pigment per bag of premixed concrete.
This provides a relatively accurate conversion from our truck and overlay
chart to premixed concrete and can be used as a guideline for color