Dave and Tom: Usually the concrete plants can't start up until the out side temperature has hit 28° and rising. It will also need to be about 32°+ for a few hours to make for a good pour. On another note, they add calcium to the concrete to get it to set faster. There are some other variables that come into play also, but that is the basics.
Just a little FYI from a former mixer driver turned electrical apprentice.
Philip
***Edited carse I caint speel tooday
[This message has been edited by GA76Apprentice (edited 11-19-2004).]
