Which of the following factors can affect the workability of concrete?

Workability of concrete refers to how easily the concrete can be mixed, placed, and finished without segregation or excessive bleeding. Various factors influence this characteristic, and understanding them helps ensure that the concrete mix will perform effectively in application.

The size of the aggregates used directly impacts workability. Smaller aggregates generally lead to a more workable mix, as they have a greater surface area to interact with the cement paste, allowing for better flow and easier placement. Conversely, larger aggregates can create a more rigid mix that is harder to work with.

Humidity levels in the environment also play a significant role in workability. High humidity can slow down the rate of evaporation of water from the surface of freshly placed concrete, affecting the setting time and leading to potential workability issues. In contrast, low humidity can lead to rapid moisture loss, making it difficult to handle and finish the concrete.

The type of cement used can influence the workability as well. Different cements have varying properties, such as fineness and chemical composition, which can affect the water-cement ratio and, consequently, the workability of the mix. Some cements contain additives that modify the concrete's rheological properties, increasing or decreasing workability.

Given that all these factors—aggregate size, environmental humidity