Yes, inhibited drying equals lower MVER.
And a history of failures.
This is the bane of MVER testing, Mr. Higgens nightmare. How come we had low MVER but the floor failed catastrophically in 6 months?
Wet slabs are dangerous. Let's just agree on that. If the slab is very wet, it has high potential
(Copyright JD 2005) for failure. The cement is still hydrating above 85%. Moisture is moving and taking alkaline constituents with it as it moves. We have always known wet slabs are bad news.
Back in the day the only test for slab wetness was placing a desiccant on the slab and covering the desiccant with a vapor tight dome, and then dancing a vapor dance, giving homage to the concrete gods and boozing up the GC to make him your best buddy in case the whole shebang blew up.
You looked at the desiccant after a couple days and it told you NOTHING about the slab besides a tiny bit of information that at this brief instant in time between your brother's third wedding and the birth of the two headed goat at the county fair, the moisture that came out of the slab while the temperature and humidity were just so, was ....X.... an unknown number... Really an insignificant number. You never knew the potential
(copyright JD 2005) of the slab... How much water was trapped inside, boiling and seething and jonesing to get out and bring its alkaline posse with it...
And floors failed. Floors failed over bad readings, that we could understand, but hey, floors were failing over good MVER readings.... WHY?
Well we know why, because there is moisture in the concrete that is dying to get out, or at least equilibrate, and that raises havoc with our flooring. So a couple of smart guys figured out that we should and could read the moisture held inside the concrete, and get an idea of the potential
(copyright JD 2005) the slab has to experience problems later in life... A slab with a LOT of moisture inside is far more likely to have a failure due to moisture and alkalinity. Even if the slab has a cap that limits MVER such as a sealer, burned surface or it was just read during a high RH period of time in the building.
So, getting off my lectern, yes a hard troweled surface will inhibit MVER, but MVER is a LOUSY indicator of a slab's readiness for flooring... Love ya Bob!