He lowered them into a temperature-controlled water tank. "See you in 28 days," he whispered. In this underwater purgatory, the chemical reaction—hydration—would continue until the concrete was rock hard. The Reckoning
C. They must be protected from shock, vibration, and moisture loss (e.g., covered with polyethylene sheeting). Final Curing bs en 12390-2:2019
BS EN 12390-2:2019 is a British Standard (BS) and European Norm (EN) that outlines the testing methods for hardened concrete. Specifically, it covers the determination of the compressive strength of hardened concrete. The standard is published by the British Standards Institution (BSI) and is widely adopted across Europe and beyond. He lowered them into a temperature-controlled water tank