...Same deal, Bill. Negative mineralization that nulls. Not desirable, but definitely real world. Like I said, it works for me, but may not for another.
However, having mixed my share of concrete over the years, I have never seen such sand used. Clean quartz sand is always whats available, especially from commercial sources..
Notice, though, that I also didnt decry the use of air testing - only suggesting that it is best employed for comparison purposes.
However, having mixed my share of concrete over the years, I have never seen such sand used. Clean quartz sand is always whats available, especially from commercial sources..
Notice, though, that I also didnt decry the use of air testing - only suggesting that it is best employed for comparison purposes.