What is the optimum amount of concrete excess allowed above the top of the measure after consolidation?

The optimum amount of concrete excess allowed above the top of the measure after consolidation is 1/8 inch. This specification is critical in ensuring consistency and accuracy in concrete testing and measurement.

An excess of 1/8 inch helps to account for any minor settling or displacement of the concrete during the consolidation process, while still allowing for accurate readings when measuring the volume or other properties of the concrete mix. This standard not only promotes precision but also helps to minimize variations that could affect test results, ensuring that the concrete mix meets the intended design specifications.

The other options do not align with the established guidelines for concrete measurement. Larger excesses could lead to inaccurate readings or excessive waste of material, which is why the 1/8 inch threshold is essential for consistency and quality control in concrete testing practices.