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"We're able to see, for example, how the quick-setting nano additives in the mix act as a performance booster during the early stages of setting, compensating for the large amounts of slower-setting fly ash and pond ash in our mixes," Gunasekara says.

Don’t use concrete or quick-setting mixes.

Large-scale 3-D printers, by contrast, pump out quick-setting concrete slurry from a nozzle on a crane or gantry arm that moves on rails, guided by a computer, to create entire structures layer by layer.

Jetmundsen said halfback Henry Seibels, who was known as Diddy, suffered a gash on his head in the game with Texas, but continued playing when the wound was covered with quick-setting plaster.

His accountant, Sid Gerwin, introduced him to Samuel Muchnick, a chemist, who developed a process to mass-produce synthetic drumheads by using a quick-setting liquid resin that bonded the plastic film to an aluminum hoop.