Where should cylinders be stored after consolidation?

Storing cylinders in or as near to the formwork as possible is critical for ensuring that the test specimens experience similar conditions to the concrete they represent. This practice helps in accurately representing the in-place concrete's curing environment, which is essential for determining the compressive strength of the concrete.

When cylinders are cured in the same environment as the casting occurs, they are subjected to the same temperature and humidity conditions, which can significantly affect hydration and, ultimately, the strength development of the concrete. Close proximity to the formwork also minimizes the potential for temperature fluctuations that could occur if the cylinders were moved to a different location, ensuring that there is a consistent and controlled environment for curing.

In contrast, other storage methods might not provide these ideal conditions. For instance, while curing in a temperature-controlled building may seem beneficial, it could create discrepancies compared to the actual field conditions under which the concrete is placed. Similarly, storing cylinders on a flat surface away from the construction area could expose them to varying environmental factors that do not accurately reflect the conditions of the in-place concrete, potentially leading to incorrect strength assessments. A separate curing room might also isolate the concrete cylinders from the actual environmental factors that will influence the parent concrete's performance.