In the world of construction and civil engineering, concrete is the ubiquitous workhorse. However, the strength and durability of a hardened concrete structure are only as reliable as the testing methods used to verify them. Before a single cube or cylinder can be crushed in a compression testing machine, a critical, often overlooked, preparatory step must be standardized: the casting and curing of the test specimens. This process is governed by BS EN 12390-2:2019, "Testing hardened concrete – Part 2: Making and curing specimens for strength tests." This standard is not merely a procedural checklist; it is a fundamental document that ensures the repeatability, comparability, and legal defensibility of concrete strength data across Europe and beyond.
Regulatory Compliance: Adhering to this standard—which supersedes the 2009 version—is often a contractual or legal requirement for European construction projects. SLOVENSKI STANDARD SIST EN 12390-2:2019 bs en 12390-2:2019
Compaction of Fresh Concrete: To avoid voids and honeycombing, the concrete must be properly compacted within the mould. The standard describes two primary methods: internal vibration (needle vibrator) and manual compaction (tamping rod). Crucially, it specifies the size of the vibrator head, the duration of vibration, and the number of rod strokes for manual compaction, depending on the specimen size and concrete slump. This removes operator guesswork. The Foundation of Reliable Concrete Testing: An Analysis
: Standardizing the laboratory and site conditions for specimen preparation to minimize variability in test results. Relationship to Other Standards : It is often used in conjunction with BS EN 12350-1 (sampling fresh concrete) and BS EN 12390-3 (compressive strength testing). 2. Key Procedures for Making Specimens This process is governed by BS EN 12390-2:2019,