(12-07-2012, 07:32 AM)CC Solutions Wrote: The 'pedigree' has nothing to do with the test itself. It has to do with the numbers being used. Who decided that 3lbs, or 5 lbs is good? And why? And who decided how to prep the slab? Clean it? Grind it? Sand it? 24 hour open period? 20"x20" square? Why? And why did it all change? And what exactly did the change do?
There was never a scientific process to the test. It started with putting CaCl granules on the floor and covering it with a plastic sheet and seeing if the CaCl granules got wet. THAT was the basis of the test. Very arbitrary.
He understands that. But then, I am asking about the ASTM E-96. Same thing. Ask the same questions about that and I bet you get the same answers.
So the question would be, " Why does E - 96 allow the use of dessicants, and the industry as a whole still allows this yet is starting to disregaurd the use of a dessicant for the puepose of MVER on a slab, yet allows it for topical coatings, all in one adhesive/vapor retarders and films over slabs"?