Making and curing concrete test specimens
Concrete is sampled in accordance with AASHTO R 60. Concrete is placed into curing molds in three equal lifts, each lift is rodded 25 times. Each mold is covered to protect against moisture loss, and carefully placed in a protected area.
1 but typically several specimens per set of cylinders
Typically 4" x 8" or 6" x 12" cylinders
compressive strength, concrete, cylinders