As I readily admit, Bob and I do not always see eye to eye.
To be honest, I read the link, and I didn't get a point out of the article, did you? He initially stated that without knowing PH, the moisture tests could be VERY confusing. But then he never explained why he states that. (You can remind him that RH tests are happening deep within the slab at PH levels in the 12-13 range Big Grin ).
I don't know much about him, but a lot of what he says seems to fly in the face of ASTM's and many of the industry experts I follow.
I think what he really is trying to say in this article is: You may trust your CaCl moisture readings but still have a failure due to alkali breakdown of the adhesive.
Is that what you got? I mean he throws a bunch of numbers out there and scares us with CAPITAL LETTERS and says all the big organizations are teaching us improperly, but what is the reader's take away of the article?