Which test for concrete is conducted at the site/field?

• A. Slump Test
• B. Color Test
• C. Compressive Strength Test
• D. Ultrasonic Test

Answer: (B)

The important idea here is assessing the workability of fresh concrete right where it’s being placed. The test done at the job site to gauge this is the slump test. It provides an immediate, practical measure of how workable the concrete is by observing how much the placed concrete settles when the cone is removed. This quick feedback helps adjust mixing, batching, or placement methods on the fly to ensure proper placement and consolidation.

Color testing isn’t a standard field control test for concrete and doesn’t reflect strength or durability; it merely notes appearance, which isn’t predictive of performance. Compressive strength testing, while essential, is done on specimens after curing in a lab or controlled environment, not during placement, so it isn’t a real-time field test. Ultrasonic testing can be performed on-site to look for internal inconsistencies, but it’s a more specialized nondestructive test and not the routine field test used to judge fresh concrete’s placement readiness.