___ tests are made by inspectors on the job to determine the consistency of concrete.

___ tests are made by inspectors on the job to determine the consistency of concrete.

• A. Compression
• B. Tensile
• C. Flexural
• D. Slump

Answer: (D)

Workability, or consistency, of fresh concrete is what inspectors assess on the job. The slump test is the standard field method for this, using a standard conical mold to measure how far the concrete settles once the mold is removed. A higher slump indicates a more fluid mix with more water, which affects how easily the concrete can be placed and compacted; a low slump means a stiffer mix that may be hard to work with. This quick test helps ensure the mix has the right consistency for proper placement, finishing, and overall performance. In contrast, tests that measure compression, tensile, or flexural strength are performed on hardened specimens to evaluate strength and durability, not the fresh mix’s workability.

Workability, or consistency, of fresh concrete is what inspectors assess on the job. The slump test is the standard field method for this, using a standard conical mold to measure how far the concrete settles once the mold is removed. A higher slump indicates a more fluid mix with more water, which affects how easily the concrete can be placed and compacted; a low slump means a stiffer mix that may be hard to work with. This quick test helps ensure the mix has the right consistency for proper placement, finishing, and overall performance.

In contrast, tests that measure compression, tensile, or flexural strength are performed on hardened specimens to evaluate strength and durability, not the fresh mix’s workability.