Which component is not related to determining gradation?

The assessment of gradation is primarily concerned with the distribution of particle sizes in aggregate materials used in concrete. This characteristic affects various properties of the concrete, such as strength and workability.

When considering the options, concrete strength, workability, and cement/water requirements can all be influenced by the aggregate gradation. For instance, proper gradation can lead to improved concrete strength and enhance workability, allowing for easier placement and finishing. On the other hand, concrete color does not have a direct impact on gradation; it is more related to the types of materials used, such as aggregates and pigments, rather than their size distribution. Therefore, concrete color stands out as the component that is unrelated to the determination of gradation.