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.
Concreteâs strength is in part a function of the temperature at which it cures. Normal compressive strength is based on curing concrete at its ideal curing temperature, 72 degrees F for a period of 28 days.Warmer temperatures reduce the cure time.On the other hand, cooler temperatures increase the length of the cure period.s long as the differential between ambient air temperature and concrete temperature is minimal, concrete poured under cold conditions will produce higher than ordinary ultimate strengths and better long-term durability. Site preparation. The secret to a good cold weather pour begins with good site preparation.