Slump tests are used to determine what aspect of fresh concrete?

Slump tests are used to determine what aspect of fresh concrete?

• A. Consistency
• B. Compressive strength
• C. Thermal stability
• D. Porosity

Answer: (A)

The slump test is all about consistency, or workability, of fresh concrete. It measures how easily the concrete can flow and be placed when fresh, which tells you how workable the mix is for filling forms, consolidating, and finishing. A higher slump means the mix is more liquid and workable, while a very low slump indicates a stiff mix that may be hard to place. This property is crucial for proper placement and avoiding segregation, but it doesn’t tell you about how strong the concrete will be after it cures, nor does it assess thermal stability or porosity—those are related to hardened concrete properties and its internal voids, not the fresh mix’s flow.