What is the single tolerance for weighing cementitious materials when the scale capacity exceeds 30%?

When weighing cementitious materials, particularly when the scale capacity exceeds 30%, the designated tolerance is ±2%. This tolerance is established to ensure accurate measurements during cement mixing, which is crucial for maintaining the desired quality and performance of concrete.

Applying a tolerance of ±2% is appropriate because it strikes a balance between precision and practicality, allowing for minor variations without compromising the overall integrity of the material being mixed. This level of accuracy supports consistent strength and workability in concrete, which is vital for structural applications.

Other tolerances mentioned vary and may not provide the same level of precision needed for cementitious materials. Adhering to the ±2% standard helps ensure that all mixes remain within the required specifications, contributing to overall project success.