What does the slump test of concrete NOT determine?

The slump test is primarily used to assess the workability, fluidity, and consistency of fresh concrete. Each of these properties helps to evaluate how easy it is to handle and place the concrete without segregation or excessive bleeding.

Workability refers to the ease with which concrete can be mixed, placed, and finished, and the slump test provides a numerical measurement that reflects this property. Fluidity indicates the ability of concrete to flow and fill molds or forms without excessive effort, which is also reflected in the results of the slump test. Consistency is a measure of the uniformity of the concrete mixture, which the slump test can effectively evaluate.

Job density, however, relates to how compacted or dense the concrete is once it has been placed and cured. It involves considerations of the mix design, specific gravity of the materials, and moisture content rather than the fresh properties assessed by the slump test. Therefore, job density is not something that the slump test determines, making it the correct choice in this context.