What should be done if the air content exceeds 9% when using the measuring cup?

The correct action when the air content exceeds 9% during measurement with a measuring cup is to use it to add water. This decision is based on the understanding that excessive air content can negatively impact the quality and performance of the concrete or mixture being prepared.

When air content surpasses the recommended threshold, the mixture may experience issues such as reduced strength and durability. Adding water can help to compensate for the excess air by ensuring a more consistent and workable mixture. This adjustment can lead to improved bonding and a denser final product, which is crucial for achieving the desired characteristics of the concrete.

It is important to follow best practices in concrete preparation, as ignoring excessive air content or simply using the mixture as-is could lead to suboptimal performance in the final application. Furthermore, using the measuring cup for additives or mixing may not address the fundamental issue of air content, which is critical to the integrity of the mixture.