Canadian Council of Independent Laboratories (CCIL) Practice Exam 2025 – All-in-One Comprehensive Guide to Exam Success!

The minimum diameter specification for the base of the slump cone is indeed 200mm. This specific measurement is essential for ensuring uniform and reliable slump tests, which are used to measure the consistency and workability of fresh concrete. The slump cone, typically made of metal, is designed to have a specific shape and size to facilitate accurate measurements.

Utilizing a base diameter of 200mm allows for a proper evaluation of the concrete's flowability while adhering to standard testing protocols. A smaller base diameter would not provide sufficient stability or surface area to attain reliable slump readings, potentially impacting the test results. The 200mm base enables researchers and professionals to obtain a standardized and consistent slump, which is crucial for quality control in concrete production.

In contrast, larger or smaller diameters, while they might seem plausible under certain circumstances, do not conform to the established industry standards. Sticking to the specified dimensions ensures that all tests are comparable and that results can be interpreted correctly within the context of concrete workability.