What effect does a higher slump indicate for a given mix?

A higher slump indicates that the concrete mix has a greater ability to flow and is therefore less stiff or rigid. This increased flowability is typically associated with a wetter mix, as there is more water relative to the other components, such as cement, sand, and aggregates. A wetter mix can result in better workability and ease of placement, which is crucial for achieving proper compaction and finishing of the concrete. Therefore, when the slump test shows a higher value, it signifies an increased water content leading to a more fluid and workable mixture. This characteristic is essential for various applications, such as ensuring that the concrete can fill forms and reach all areas without leaving voids.