White portland cement is very similar to regular gray portland cement and is often used for small or decorative concrete applications because of the price. White cement is more expensive than regular portland cement because it takes more to refine white cement to ensure it stays white.
White cement can be used interchangeably with or instead of regular portland cement at the same mix ratios you would use for a regular concrete mix. These two types of cement are quite similar, however, there are a couple of differences between them other than just the color.
Obviously, white cement is white and not grey. The white color is achieved by using slightly less raw materials, leaving out the ingredients and refining processes that contribute to the gray color. Materials like iron oxide and manganese are minimized to it white and during the refining process, an oil-fired kiln is used instead of coal or natural gas to avoid contamination from coal ash.
White cement powder is a finer consistency than regular cement powder. The fineness of the cement makes the initial set up time faster because the fine powder allows for faster and more thorough water absorption to begin the actuating process (hardening). The finished strength and quality of white concrete compared to regular concrete is basically the same.
White cement is typically used for smaller projects and decorative applications simply due to the high cost of it compared to regular concrete. Making concrete slabs, driveways or sidewalks is basically unheard of because of the prohibitive cost of the white concrete in those large amounts.
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