What type of test can be performed on-site to verify the consistency of delivered concrete?

The slump test is a widely accepted method used on-site to assess the consistency and workability of freshly mixed concrete. During this test, a specific apparatus, known as a slump cone, is filled with concrete, which is then lifted off. The distance that the concrete slumps or settles is measured. This measurement indicates the consistency; a higher slump signifies a wetter mix that is easier to work with, while a lower slump indicates a stiffer mix.

Using the slump test is advantageous because it provides immediate feedback on the concrete's performance characteristics without the need for laboratory analysis of samples. This rapid assessment helps construction teams make necessary adjustments to maintain the desired properties of concrete for a specific application on the job site. The slump test is particularly valuable in ensuring that the delivered concrete meets the required specifications for a project, promoting quality assurance and structural integrity in the final construction.