I'm a newly certified concrete tech and have been certified in soils for a little bit. Soils was easy to tell what was acceptable because moisture was the only thing I had to really watch out for. I trained for a while under some good techs and learned the general acceptability range for concrete, I can tell whats good enough. I know they put a bunch of funky stuff in the concrete to keep it viable in the colder weather (under 32) but does this affect me at all? Basically I'm wondering wether I should be more or less lenient, allow the batch plant todo there thing and trust in Jesus, keep them in normal perameters or be stricter? Also is there anyway the added chemicals could specially influence any of the tests? I just test the stuff so I guess I don't really need to know but I was also curious what the cold weather chemicals they add are if anyone knows