The recommended storage condition for cement to ensure proper hydration is in dry environments. Cement is a hygroscopic material, meaning it readily absorbs moisture from the air. When stored in humid or moist environments, there is a risk that the cement may absorb excess moisture, leading to clumping or the beginning of hydration before it is properly mixed with water at the time of use. This premature hydration can significantly reduce the effectiveness of the cement, impairing its ability to properly bond with aggregates and achieve the desired strength and durability in concrete.
While other conditions such as room temperature are generally acceptable for the storage of cement, the primary concern revolves around moisture levels rather than temperature alone. Storing cement under direct sunlight could lead to elevated temperatures and potential degradation, while humid or moist environments compromise the cement's integrity before it is utilized in concrete mixing. Therefore, maintaining a dry storage environment is essential to preserve the quality of the cement and ensure optimal hydration when mixed with water.