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.
Concrete first must be scoured clean with a concrete cleaning solution, a scrub brush or a cleaning machine, then allowed to dry before any etching takes place. Never clean a new concrete pad until at least one month of curing time has been allowed at minimum. After all the water has been removed, the pad should have at least 48 hours of drying time before you apply any etching to the surface. If the weather is particularly humid, wait up to 72 hours for best results. There are numerous types of etching materials available for use with concrete, but as a general rule, they only need 15 to 30 minutes of time on the surface of the concrete to work their way down through the initial layer and etch the surface.