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Moulds must be dimensionally accurate within fractions of a millimeter to prevent skewed load distributions during testing. They must also be water-tight to prevent loss of paste and water. 2. Compacting Tools
Many laboratories are now using digital barcode tracking linked to temperature sensors to automate compliance with the 2019 version. bs en 12390-2:2019
┌──────────────────────────────────────────┐ │ Freshly Cast Specimen │ └────────────────────┬─────────────────────┘ │ ▼ ┌──────────────────────────────────────────┐ │ Initial Curing │ │ • Leave in mould for 16 to 72 hours │ │ • Temperature: 20°C (± 2°C or ± 5°C) │ │ • Protect from wind, solar, and shock │ └────────────────────┬─────────────────────┘ │ ▼ ┌──────────────────────────────────────────┐ │ Demoulding Phase │ │ • Carefully remove without damage │ │ • Permanently mark the specimen ID │ └────────────────────┬─────────────────────┘ │ ▼ ┌──────────────────────────────────────────┐ │ Long-Term Curing │ │ • Submerge in water at 20°C (± 2°C) │ │ - OR - │ │ • Mist room at 20°C (± 2°C) & >95% RH │ └──────────────────────────────────────────┘ Initial Curing (In the Mould)
According to the guidelines, fresh concrete is poured into moulds (commonly 100mm or 150mm cubes or cylinders). Proper compaction is essential to remove trapped air, which can weaken the specimen. This public link is valid for 7 days
Once removed from the moulds (demoulded), the specimens must be cured in a controlled environment to ensure maximum strength development.
The process of making concrete specimens must be executed systematically to prevent segregation of aggregates and ensure uniform density. Step 1: Preparation of Moulds Can’t copy the link right now
Any visible defects or deviations from the standard process. 6. Practical Implications for On-Site Engineering
The standard outlines specific requirements for making specimens, including:
Failing to follow BS EN 12390-2:2019 introduces variables that compromise project data.
BS EN 12390-2:2019 is referenced by other UK and European standards, including: