That's a British Standard (BS) and European Norm (EN) that outlines the testing methods for hardened concrete. Specifically, Part 2 of the standard focuses on the "Determination of compressive strength of test specimens".
BS EN 12390-2:2019 defines the standardized methods for making and curing concrete test specimens, such as cubes, cylinders, and prisms, to ensure accurate compressive and flexural strength results. The standard outlines specific procedures for molding, compaction, and environmental curing controls required for quality assurance and regulatory compliance. For more details, visit BSI Knowledge . BS EN 12390-2:2019 - TC | 31 Jul 2019 | BSI Knowledge bs en 12390-2:2019