Which field test parameter is typically checked to verify workability and is specified in the mix design?

• A. Curing duration
• B. Air content
• C. Slump targets
• D. Finish texture

Answer: (C)

Workability of freshly mixed concrete is shown by how easily it can be placed, consolidated, and finished. The field parameter that directly measures this is the slump, and the mix design specifies a target slump to achieve the desired workability on site. Keeping the actual slump at the target ensures the concrete will behave as intended during placement and finishing; too stiff a mix makes placement hard, while too flowable a mix can lead to segregation and problems with finishing.

Curing duration relates to the curing process after placing, not how the concrete flows when fresh. Air content affects durability and density, not immediate workability. Finish texture concerns the surface outcome rather than the mix’s flow characteristics.