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.
Depending on the composite of the concrete material, it can melt at  different temperatures. When concrete reaches a high enough  temperature such as more than 1000 degrees â¦ Celsius, it can crumble  like sugar.he melting will start with the material that has the lowest temperature melting point unless you allow the system to take a long time and react into other solids first, of course. A ballpark guess of 800-1000Â°C for melting is what I would assume, for various reasons.