In determining the consistency of freshly made concrete, which test is usually conducted?

• A. Slump test
• B. Compression test
• C. Tensile test
• D. Beam test

Answer: (A)

Consistency of freshly mixed concrete refers to its workability—the ease with which it can be placed, handled, and consolidated. The slump test is the standard, quick field method to evaluate this property. It uses a conical mold filled with concrete in layers, each layer tamped, then the mold is lifted and the vertical drop of the concrete is measured. A larger slump indicates more workable concrete, while a very low slump means a stiffer mix that’s harder to place; too high a slump can risk segregation.

This test specifically targets fresh concrete behavior, not how strong the concrete will be after it hardens. Tests like compression, tensile, or beam tests assess properties of hardened concrete (strength or stiffness) rather than its immediate consistency. That’s why the slump test is the best choice for determining the mix’s consistency.