Bs En 12390-2:2019 ((new)) Access

: Instructions for preparing moulds and the systematic filling process to avoid segregation.

The standard BS EN 12390-2:2019 covers the procedures for making and curing specimens of hardened concrete for testing. The standard is applicable to concrete made with normal weight aggregates, lightweight aggregates, and heavyweight aggregates. The standard provides guidelines for: bs en 12390-2:2019

For quality control laboratories, accredited testing firms, and construction contractors, adherence to this standard is often a condition of certification under ISO/IEC 17025. It enables repeatable, comparable, and legally defensible test data. Disputes over concrete strength are frequently traced back to non-compliance with specimen preparation and curing protocols, making this standard a cornerstone of forensic structural analysis. : Instructions for preparing moulds and the systematic

: After compaction, the top surface is leveled using a float or trowel to ensure a flat, smooth surface for testing. 3. Standard Curing Requirements The standard provides guidelines for: For quality control

After removal from the molds (demolding), the specimens must be cured in water or in a mist room. If water curing is used, the specimens must be fully submerged in a tank. The water temperature must be maintained at a constant 20°C (± 2°C). If a mist room is used, the relative humidity must be kept above 95%. This controlled environment ensures that the hydration of the cement continues optimally, allowing the concrete to gain strength at a predictable rate. Marking and Documentation

Includes filling and compacting moulds, surface leveling, marking, curing conditions, and transportation. Curing Requirements: Specimens must remain in moulds for 16 hours to 3 days at