The "fastest 20 minutes in masonry" returned to World of Concrete 2015, with 18 skilled masons competing for the Fastest Trowel title. Tim O'Toole, director of marketing, education, and information technology for the Mason Contractors Association of America (MCAA) recaps the competition, which was won by Arcadio Armenta from Sutter Masonry in El Mirage, Ariz., with Guadalupe Aragon as tender.