Dive summary:

• Tests done at Middle Tennessee State University indicate that a finishing additive extends finishing time and makes it easier to get a closed, smooth surface.
• Lythic Solutions makes the product called Day 1 and says it inhibits quick drying due to wind or heat without affecting the quality or strength of the slab.
• The next phase of testing being run by the college's Concrete Industry Management Program will be having a number of industry professionals finish slabs poured at the World of Concrete industry meeting in Las Vegas in February.

From the article:

The concrete with no troweling aid or additional water was finished first, but even so, it set prematurely and could not be finished properly. ...