What is the proper action if a concrete specimen has a slump of over 1 inch?

When a concrete specimen exhibits a slump of over 1 inch, this indicates that the consistency and workability of the concrete mix may not be optimal for the intended application. The primary goal in concrete mixing is to achieve a balance between workability and strength, and a higher slump may suggest that the mixture needs adjustment to achieve the desired properties.

Adjusting the mix design is the proper course of action because it allows for modifications to be made to the proportions of water, cement, aggregates, and other additives. This adjustment can help lower the slump to an acceptable range, ensuring that the concrete maintains its strength and durability while remaining workable during placement. A proper balance of these components can also help prevent problems such as segregation, bleeding, or difficulties in finishing the surface.

In summary, adjusting the mix design is a proactive approach to ensure that the concrete meets the requirements of the project specifications and performs well in its intended use.