What is one potential cause of discoloration in finished concrete?

Discoloration in finished concrete can often be attributed to variations in mix design, moisture content, or finishing techniques. Each of these factors plays a crucial role in the final appearance of the concrete surface.

For instance, if there are inconsistencies in the mix design, such as different proportions of cement, aggregates, and water, the resulting concrete may cure and set unevenly, leading to areas with distinct color variations. Similarly, differences in moisture content can affect hydration rates during curing, which also influences the final color of the concrete. Finally, different finishing techniques—like varying the timing and method of troweling or brooming—can alter surface texture and appearance, further contributing to discoloration.

All these factors combined might lead to an undesirable and uneven aesthetic, making it essential for contractors to maintain consistency in mix design, ensure uniform moisture levels, and employ standardized finishing procedures to minimize the risk of discoloration.