: After demoulding, specimens are typically stored in water at or in a humidity chamber with relative humidity until the test date. 📋 Reporting Requirements A formal test report must be generated, including: Unique identification of the test sample. The exact date and time the specimens were made. The specific method of compaction used. Details of the curing conditions and duration. Any deviations from the standard procedures. 🛡️ Why This Standard Matters

: Procedures for finishing the top surface and clearly identifying each specimen for tracking.

For a ready-mix concrete supplier or a contractor on a major infrastructure project (e.g., HS2, Crossrail, or National Highways schemes):

The standard BS EN 12390-2:2019 covers several key aspects of making and curing specimens, including:

After casting, specimens must be protected from evaporation, shock, and extreme temperatures. For the first 24 hours (the initial curing period), the standard recommends storing the moulded specimens at a temperature of 20°C ± 5°C and near 100% relative humidity, often achieved by covering with plastic sheeting or damp mats.