Measuring ingredients accurately and consistently is essential in order to produce white or colored concrete of uniform quality and color from batch to batch. White cement should be stored separately from gray cement. If layout of the mixing facility permits, a dedicated silo prevents contamination from other materials. Soft-sided bulk bags may be available for the handling of bulk white cement. For smaller operations or for intermittent projects, standard-sized bags of 42 kg or 94 lb (40 kg in Canada) can be added directly to a ready-mix truck.

No foreign materials should contaminate the concrete. Batching all ingredients into clean trucks permits mixing white concrete directly in a transit mixer.

For truck mixing to be effective, all sources of water must be strictly controlled and batch-tobatch variations in water content should be avoided. To start with, the aggregates should have a reasonably uniform moisture content throughout the stockpile. In addition, the water-dispensing device must be accurate. It should be calibrated periodically.

The importance of controlling water content cannot be overstated. Variations in water (or cement) content can affect the color of concrete. A low water-cement ratio paste is almost always darker than a high water-cement ratio paste made with the same cement.