Weather for Lihue, HI. Overcast 69.6Â° Feels like 69.6Â° High: 79Â° Low: 72Â° Current conditions as of 04/21/17 5:40 AM HST. Humidity: 91% Visibility: 10.0 mi Dewpoint: 67Â° Barometer: 30.06 in Wind: SW Sunrise: 6:12 AM Sunset: 06:59 PM.
The American Concrete Institute recommends a maintained temperature of 70 degrees F for three days or 50 degrees F for five days to gain sufficient strength for a cold pour to perform up to specification.
It depends on the outside temperature. Also, you can add calcium chloride at lower temperatures, to decrease set time. 70Â°F - 6 hours. 60Â°F - 8 hours. 50Â°F - 11 hours. 40Â°F - 14 hours. 30Â°F - 19 hours. 20Â°F - Concrete will freeze.