Concrete Flatwork Technician And Flatwork Finisher Practice Test

True or False: Bull floating must be done after all of the bleed water has evaporated from the surface.

True False Not Specified Sometimes

Correct Answer:

False

Explanation:

Timing is key for bull floating. The goal is to smooth and consolidate the surface while beginning to embed the aggregate and close small surface voids. Do this when the surface has started to stiffen and the bleed water is receding but hasn’t completely disappeared. A little bleed water on the surface can actually help by lubricating the float and carrying away fines, which aids in forming a uniform, laitance-free surface. Waiting until all bleed water has evaporated makes the surface drier and harder to work, often leading to a rougher finish or surface dusting. So, bull floating after all bleed water has evaporated is not required and is not the best practice.

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