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Many of our customers are building houses or pouring colored concrete slabs and have questions about how to mix integral color into the concrete correctly. While adding pigment to the concrete before pouring a slab is by far the easiest color option, customers still need to ask a few important questions to get the color and appearance they’re hoping for.
Before ordering your concrete pigment, call the ready-mix company responsible for pouring your concrete and ask the following questions:
What PSI or Sack Mix will the Company be Pouring?
The strength of most concrete is slabs is either 3000 or 3500 psi and represents the amount of cement contained in each yard of concrete. Our truck pour project calculator will also you to calculate for any strength from 3000-6000 psi. The higher the psi the more pigment will be required to achieve the colors on the color chart.
What Percentage of Fly Ash will be Added to the Concrete?
Fly ash is added by the ready-mix concrete plant in place of cement. Fly ash does not necessarily affect concrete strength but it does reduce production costs. Excessive fly ash in the concrete can lighten the final slab color. 20% or less fly ash is acceptable with 10% being ideal.
How Many Yards of Concrete will be Poured?
The number of yards poured determines how many pounds of pigment will be needed to achieve a specific color from our color chart. The same amount of pigment and water should be added to each truck to control for color variation if more than one truck is involved.
Direct Colors provides five concrete pigment calculators to help customers determine how much pigment will be needed for their projects. The pigment needed to achieve a specific color is based on the amount of cement in the mix rather than the total weight of the bag. The project calculator tool is designed to calculate for truck pours, custom concrete batches, such as stucco, mortar or grout, 5000 psi countertop mixes, and bags of ready-mix concrete. When using the custom batch calculator, keep in mind that the weight of cement will vary by material and to correctly adjust the values accordingly. Visit our Project Calculator and watch our short instructional video to make sure you’re measuring properly. Our How to Use Concrete Pigment guide provides step-by-step details for mixing our pigments into any cement-based material!