The following story personifies this technical process through the eyes of a meticulous Site Engineer. The Guardian of the Cube

The standard also specifies the tools for compaction. Depending on the consistency of the concrete, this may include internal vibrators (poker vibrators), vibrating tables, or manual tamping rods. For manual compaction, the rod must be circular in cross-section, straight, and made of steel with a smooth finish. The Making of Test Specimens

Once removed from the moulds, specimens intended for standard strength tests must be cured in water.

This article provides an in-depth look at the requirements of this crucial standard and how it is applied in the field. What is BS EN 12390-2:2019?

BS EN 12390-2:2019 the British and European standard that defines the procedures for making and curing concrete specimens for strength tests

Adhering to BS EN 12390-2:2019 removes variables from the testing process. If two different technicians make cubes from the same batch of concrete using different methods, their structural results will vary. Following a strict, unified protocol ensures that testing variations stem from the concrete mix itself, not from poor laboratory habits.

This report provides a general overview of BS EN 12390-2:2019 and should not be considered a substitute for the actual standard. It is essential to consult the standard and relevant regulatory requirements for specific guidance on making and curing concrete specimens.

Failing to follow BS EN 12390-2:2019 introduces variables that compromise project data.

Improper curing is the leading cause of unrepresentative low-strength test results. BS EN 12390-2:2019 splits curing into two distinct stages: initial on-site curing and long-term laboratory curing. Initial Curing (In the Mold)

Must be made of non-absorbent, rigid material (usually steel, cast iron, or heavy-duty plastic). They must maintain dimensions under compaction force. Standard shapes include cubes (typically 100mm or 150mm) and cylinders (typically 150mm diameter by 300mm height).

Using a vibrating table or internal "poker" vibrator. Hand Compaction: Using a standard tamping rod or bar.