Emma Morano, 117 years old, blows candles in the day of her birthday in Verbania, Italy, Tuesday, Nov. 29, 2016. At 117 years of age, Emma is now the oldest person in the world and is believed to be the last surviving person in the world who was born in the 1800s. Antonio Calanni, AP. Fullscreen.
Wind, humidity, and sunlight are all factors in how long it takes for concrete to cure, walking, normally about 1 to 2 days. 5. How long does it take for concrete to cure enough to drive on? Again, wind, humidity, and sunlight are all factors but the standard is about 5 to 7 days. Start with a minimum of 2 people for a 1 cubic yard pour. 2  Add one person for each additional cubic yard of concrete. 3  If you are using wheelbarrows to move the concrete form the truck to the forms, add an additional person.
Cured and Dry. Concrete continues to harden for several years after it is poured, but the standard period of initial curing is 28 days, or roughly one month. At this point, the concrete is very close to full strength and is ready to accept most commercially available sealants. However, sealers typically must be applied to dry concrete. You can test the concrete for moisture content by securing a piece of aluminum foil on the sidewalk with duct tape and waiting 24 hours. If the foil is dry when you remove it, the sidewalk is ready for sealing.