Bs En 12390-2:2019 -

Place the mold firmly on the table. Vibrate until the surface becomes relatively smooth, air bubbles cease to emerge, and a thin film of cement grout appears on top. Avoid over-vibration, which sinks heavy aggregate to the bottom.

As soon as the concrete blocks are carefully stripped from their molds, mark them with a permanent, waterproof identifier (e.g., sample ID and date). They must then immediately be placed into their final curing environment until the exact moment of testing (usually at 7 or 28 days). bs en 12390-2:2019

Once demoulded, the specimens enter the main curing phase. This ensures hydration continues uninterrupted. Place the mold firmly on the table